JP3848214B2 - Horizontal force distribution bearing device - Google Patents

Horizontal force distribution bearing device Download PDF

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JP3848214B2
JP3848214B2 JP2002163804A JP2002163804A JP3848214B2 JP 3848214 B2 JP3848214 B2 JP 3848214B2 JP 2002163804 A JP2002163804 A JP 2002163804A JP 2002163804 A JP2002163804 A JP 2002163804A JP 3848214 B2 JP3848214 B2 JP 3848214B2
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rubber body
laminated rubber
plate
horizontal force
force distribution
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JP2004011197A (en
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惣一郎 清水
洋一 熊谷
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東京ファブリック工業株式会社
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Description

【0001】
【発明の属する技術分野】
本発明は、複数層の補強板を内蔵する積層ゴム体と、該積層ゴム体の下面に固着される下沓と、該積層ゴム体の上面に固着される上沓と、を備え、下部構造物と上部構造物の間に設置される水平力分散支承装置に係り、特に鉛直剛性を低く維持することにより回転機能を妨げることがなく、水平剛性を高めることにより構造物に悪影響を及ぼすことがないような、水平力分散支承装置に関する。
【0002】
【従来の技術】
従来より橋梁や建物等の構造物においては、その上部構造物に作用する慣性力を下部構造物に確実に伝達するために、該下部構造物と上部構造物の間に、ゴム板と剛性板が複数層に亘って交互に積層された積層ゴム体を備える水平力分散支承装置が設置されている。この水平力分散支承装置には、上部構造物に作用する荷重を支持するための荷重支持機能,上部構造物の上下方向回転によるひずみに追随するための回転機能,及び上部構造物の通常時や地震時における水平変位に追随するための水平移動機能等が求められる。換言すれば、水平力分散支承装置には、鉛直方向については、上部構造物の上下方向回転によるひずみに追随しやすいように低い鉛直剛性が要求され、水平方向については、上部構造物の地震時における過度の水平変位を抑制しやすいように高い水平剛性が要求される。
【0003】
【発明が解決しようとする課題】
ここで積層ゴム体を備える水平力分散支承装置では、金属支承に比べて支圧面積が大きいため、上部構造物の上下方向回転によるひずみ量が大きくなり、該ひずみ量に追随する回転機能を求めると積層ゴム体の厚さが厚くなってしまうため、水平剛性が低くなってしまい、上部構造物の地震時における水平変位が過度に大きくなってしまうため、構造物に悪影響を及ぼしてしまう。しかしながら、水平剛性を高めるために支圧面積をさらに大きくすると、該支圧面積の増加に伴う回転機能を求めるために積層ゴム体の厚さがさらに厚くなってしまい、水平力分散支承装置が大型化するため、コストの上昇を招くと共に施工の煩雑化を招くことになる。即ち水平力分散支承装置では、鉛直方向の性能と水平方向の性能は二律背反の関係にある。
【0004】
本発明は、このような背景のもとになされたものであり、その目的は、装置の大型化を防止すると共に、鉛直剛性を低く維持することにより回転機能を妨げることがなく、水平剛性を高めることにより構造物に悪影響を及ぼすことがないような、水平力分散支承装置を提供することにある。
【0005】
【課題を解決するための手段】
本発明は、前記課題を解決するために、次のような手段を採る。なお参考のために図面中の符号を付すが、本発明は該図面により限定されるものではない。
【0006】
まず請求項1に係る発明は、図1〜図6に示すように、複数層の補強板(薄鋼板13,上厚鋼板14,下厚鋼板15,及び中間厚鋼板16)を内蔵し一体に成型された積層ゴム体11と、該積層ゴム体の下面に固着される下沓17と、前記積層ゴム体の上面に固着される上沓18とを備え、下部構造物(橋台1)と上部構造物(橋桁2)の間に設置される水平力分散支承装置であって前記積層ゴム体の前記複数層の補強板のうち、上部の一層及び下部の一層を除く中間の層の所定の一層に係る補強板を、他の中間の層に係る補強板(薄鋼板13)よりも厚い中間厚板補強板(中間厚鋼板16)とし、前記複数層の補強板のうちの前記上沓に固着される上部の一層に係る補強板を、前記他の中間の層に係る補強板(薄鋼板13)よりも厚い上厚板補強板(上厚鋼板14)とし、前記複数層の補強板のうちの前記下沓に固着される下部の一層に係る補強板を、前記他の中間の層に係る補強板(薄鋼板13)よりも厚い下厚板補強板(下厚鋼板15)とし、前記積層ゴム体に一体に成型された前記中間厚板補強板(中間厚鋼板16)に対向し接触可能な位置まで、前記下沓又は前記上沓のいずれか一方からストッパブロック17b突設され前記積層ゴム体は、鉛直方向には全厚が有効厚として作用して鉛直剛性を低くし、水平方向には、前記ストッパブロックと接触することにより、接触位置より上側又は下側のいずれか一方の側を拘束して、水平剛性を高めたことを特徴とする水平力分散支承装置10である。
【0007】
また請求項2に係る発明は、請求項1に記載した水平力分散支承装置であって、図7〜図9に示すように、前記中間厚板補強板(中間厚鋼板26)は、前記積層ゴム体21の側面からフランジ状に露出可能であることを特徴とする水平力分散支承装置20である。
【0008】
また請求項3に係る発明は、請求項2に記載した水平力分散支承装置であって、図10〜図11に示すように、前記積層ゴム体31は、複数層の補強板を内蔵する下側部分積層ゴム体31aと、複数層の補強板を内蔵する上側部分積層ゴム体31bとからなり、前記上側部分積層ゴム体31bは、前記上厚板補強板と、前記複数層の補強板のうちの下部の一層に係る補強板であって、前記他の中間の層に係る補強板よりも厚く、かつ、大きい下側フランジ板36bとを有し、前記下側部分積層ゴム体31aは、前記下厚板補強板と、前記複数層の補強板のうちの上部の一層に係る補強板であって、前記他の中間の層に係る補強板よりも厚く、かつ、大きい上側フランジ板36aとを有し、前記下側フランジ板36bと前記上側フランジ板36aをボルトにて接合することにより、前記積層ゴム体の側面からフランジ状に露出する前記中間厚板補強板(中厚鋼板36)を構成することを特徴とする水平力分散支承装置30である。
【0009】
また請求項4に係る発明は、請求項2又は3に記載した水平力分散支承装置であって、図〜図14に示すように、前記中間厚板補強板(中間厚鋼板26,36,46)には、露出する平面部に切欠26a又はフランジ孔46aを設け、前記ストッパブロック27b,47bは、記切欠又は前記フランジ孔に対応する位置に嵌合可能に設けられているものであることを特徴とする水平力分散支承装置20,30,40である。
【0010】
また請求項5に係る発明は、請求項1〜4のいずれか1つに記載した水平力分散支承装置であって、図15〜図16に示すように、前記ストッパブロック57bは、前記中間厚板補強板(中間厚鋼板56)の前後左右に対向する位置に設けられていることを特徴とする水平力分散支承装置50である。
【0011】
また請求項6に係る発明は、請求項1に記載した水平力分散支承装置であって、図17〜図20に示すように、前記積層ゴム体61には、前記積層ゴム体の下面又は上面から前記中間厚板補強板(中間厚鋼板66)に至るように内部孔61aを設け、前記ストッパブロック67bは、前記内部孔に対応する位置に嵌合可能に設けられているものであることを特徴とする水平力分散支承装置60である。
【0012】
さらに請求項7に係る発明は、請求項1〜6のいずれか1つに記載した水平力分散支承装置であって、図21〜図23に示すように、前記中間厚板補強板(中間厚鋼板76)と前記ストッパブロック77bとの間に所定の隙間Sを設けていることを特徴とする水平力分散支承装置70である。
【0013】
【発明の実施の形態】
以下、本発明の実施の形態を、図面を参照して説明する。本発明は、複数層の補強板を内蔵する積層ゴム体と、該積層ゴム体の下面に固着される下沓と、該積層ゴム体の上面に固着される上沓と、を備え、下部構造物と上部構造物の間に設置される水平力分散支承装置10,20,30,40,50,60,70である。以下においては、該水平力分散支承装置が、下部構造物であるコンクリート製の橋台1と、上部構造物である鋼製の橋桁2からなる、多径間連続桁の橋梁に適用される例について説明する。また、以下においては、橋軸方向を前後、橋軸直角方向を左右と称する。
【0014】
なお本発明に係る水平力分散支承装置には、第1実施形態に係る水平力分散支承装置10,第2実施形態に係る水平力分散支承装置20,第3実施形態に係る水平力分散支承装置30,第4実施形態に係る水平力分散支承装置40,第5実施形態に係る水平力分散支承装置50,第6実施形態に係る水平力分散支承装置60,及び第7実施形態に係る水平力分散支承装置70が含まれる。以下においては、第1実施形態に係る水平力分散支承装置10〜第7実施形態に係る水平力分散支承装置70までを順に説明する。また、以下においては、各実施形態において、同一の機能を有する構成要素については、同一の用語を用いて詳細な説明を省略すると共に、図面中の符号のうちの一の位の数字を同一の数字とする一方で十の位の数字を各実施形態に対応させた数字とする。
【0015】
[第1実施形態に係る水平力分散支承装置10]
まず図1〜図3は本発明の第1実施形態に係る水平力分散支承装置10(下沓17からストッパブロック17bが突設されるもの)を表す図である。この第1実施形態に係る水平力分散支承装置10は、複数層の補強板を内蔵する積層ゴム体11と、該積層ゴム体11の下面に固着される下沓17と、該積層ゴム体11の上面に固着される上沓18と、を備え、下部構造物である橋台1と上部構造物である橋桁2の間に設置されるものである。
【0016】
積層ゴム体11は、矩形のゴム板と矩形の補強板が複数層に亘って交互に積層されて一体加硫成型されたものである。ここでゴム板の材質は、例えばゴム弾性体であり、補強板の材質は、例えば鋼である。この補強板には、薄鋼板13,上厚板補強板である上厚鋼板14,下厚板補強板である下厚鋼板15,及び中間厚板補強板(以下厚板補強板という)である中間厚鋼板16が含まれる。ここでゴム板の厚さは例えば25mm程度であり、薄鋼板13の厚さは例えば3.2mm程度であり、上厚鋼板14,下厚鋼板15,及び中間厚鋼板16の厚さは例えば40mm程度である。この積層ゴム体11は、上側から順に上厚鋼板(上厚板補強板)14,ゴム板,薄鋼板13,ゴム板,薄鋼板13,ゴム板,中間厚鋼板(厚板補強板)16,ゴム板,薄鋼板13,ゴム板,薄鋼板13,ゴム板,下厚鋼板(下厚板補強板)15が積層されて一体加硫成型されたものである。ここで本発明では、複数層の補強板のうちの任意の一層に係る補強板を、他の層に係る補強板(薄鋼板13)よりも厚い厚板補強板(中間厚鋼板16)とした点に特徴があり、ここでは積層ゴム体11の全厚における中間に中間厚鋼板16を設けている。
【0017】
この積層ゴム体11において、上厚鋼板14が適宜の数の取付ボルト18aにより上沓18と固着され、下厚鋼板15が適宜の数の取付ボルト17aにより下沓17と固着されて、水平力分散支承装置10が構成される。そして水平力分散支承装置10において、適宜の数のアンカーボルト1aにより橋台1に下沓17が固着され、橋桁2に適宜の数の締結ボルト2aにより締結されたソールプレート2bに剪断キー2cを介して上沓18が接続されて、水平力分散支承装置10が橋梁に設置される。ここで本発明では、中間厚鋼板16に対向する位置まで、下沓17からストッパブロック17bを突設した(立ち上げた)点に特徴があり、ここでは下沓17の前後にストッパブロック17b,17bを設けている。
【0018】
次に図4は図1〜図3に示す水平力分散支承装置10の作用を表す橋軸方向の断面図である。この水平力分散支承装置10によれば、鉛直方向については、積層ゴム体11の全厚が有効厚として作用するので、鉛直剛性は低く維持される。一方、水平方向については、中間厚鋼板16がストッパブロック17bに接触することにより、積層ゴム体11の片側(ここでは下側)が確実に拘束され、該積層ゴム体11の反対側(ここでは上側)のみが自由に動いて水平変位に対応するので、水平剛性を高めることができる。
【0019】
次に図5及び図6は本発明の第1実施形態に係る水平力分散支承装置10’の変形例(上沓からストッパブロックが突設されるもの)を表す図である。この変形例に係る水平力分散支承装置10’は、第1実施形態に係る水平力分散支承装置10と同様に、複数層の補強板を内蔵する積層ゴム体11と、該積層ゴム体11の下面に固着される下沓17と、該積層ゴム体11の上面に固着される上沓18と、を備え、下部構造物である橋台1と上部構造物である橋桁2の間に設置されるものであるが、第1実施形態に係る水平力分散支承装置10と異なり、中間厚鋼板16に対向する位置まで、上沓18からストッパブロック18bを突設した(立ち下げた)点に特徴があり、ここでは上沓18の前後にストッパブロック18b,18bを設けている。
【0020】
この水平力分散支承装置10’によれば、鉛直方向については、積層ゴム体11の全厚が有効厚として作用するので、鉛直剛性は低く維持される。一方、水平方向については、中間厚鋼板16がストッパブロック18bに接触することにより、積層ゴム体11の片側(ここでは上側)が確実に拘束され、該積層ゴム体11の反対側(ここでは下側)のみが自由に動いて水平変位に対応するので、水平剛性を高めることができる。
【0021】
[第2実施形態に係る水平力分散支承装置20]
次に図7は本発明の第2実施形態に係る水平力分散支承装置(中間厚鋼板が積層ゴム体の側面からフランジ状に露出されるもの)を表す図であり、図8及び図9は図7に示す水平力分散支承装置20を構成する積層ゴム体21を表す図である。この第2実施形態に係る水平力分散支承装置20は、第1実施形態に係る水平力分散支承装置10と同様に、複数層の補強板を内蔵する積層ゴム体21と、該積層ゴム体21の下面に固着される下沓27と、該積層ゴム体21の上面に固着される上沓と、を備え、下部構造物である橋台と上部構造物である橋桁の間に設置されるものであるが、第1実施形態に係る水平力分散支承装置10と異なり、厚板補強板である中間厚鋼板26が積層ゴム体21の側面からフランジ状に露出される点に特徴があり、ここでは該中間厚鋼板26の左右方向(橋軸直角方向)に切欠26a,26aを設けると共に、下沓27の左右にストッパブロック27b,27bを設けて、該切欠26aとストッパブロック27bを嵌合している。
【0022】
この水平力分散支承装置20によれば、鉛直方向については、積層ゴム体21の全厚が有効厚として作用するので、鉛直剛性は低く維持される。一方、水平方向については、中間厚鋼板26に設けられた切欠26aの内面がストッパブロック27bに接触することにより、積層ゴム体21の片側(ここでは下側)が確実に拘束され、該積層ゴム体21の反対側(ここでは上側)のみが自由に動いて水平変位に対応するので、水平剛性を高めることができる。このように前後方向(橋軸方向)でなく左右方向(橋軸直角方向)に拘束可能なストッパブロック27aを設けたので、該前後方向のスペースが狭隘であっても水平力分散支承装置20を設置できる。なお変形例に係る水平力分散支承装置10’と同様に、上沓からストッパブロックを突設するようにしても良い。
【0023】
[第3実施形態に係る水平力分散支承装置30]
次に図10及び図11は本発明の第3実施形態に係る水平力分散支承装置(下側部分積層ゴム体31aの下側フランジ板36aと上側部分積層ゴム体31bの上側フランジ板36bが接合ボルト36cにて接合されるもの)を構成する積層ゴム体31を表す図である。この第3実施形態に係る水平力分散支承装置30は、第2実施形態に係る水平力分散支承装置20における積層ゴム体21に代えて積層ゴム体31を用いるものである。
【0024】
この積層ゴム体31は、複数層の補強板を内蔵すると共に該補強板よりも大きい下側フランジ板36aが上面に固着された下側部分積層ゴム体31aと、複数層の補強板を内蔵すると共に該補強板よりも大きい上側フランジ板36bが下面に固着された上側部分積層ゴム体31bと、からなり、下側フランジ板36aと上側フランジ板36bを接合ボルト36cにて接合することにより、積層ゴム体31の側面からフランジ状に露出する厚板補強板である中間厚鋼板36が構成されるものであり、ここでは該中間厚鋼板36の左右方向(橋軸直角方向)に切欠36d,36dを設けている。ここで下側部分積層ゴム体31aと上側部分積層ゴム体31bは、天地は逆であるが、下側フランジ板36aと上側フランジ板36bとが同一の形状の鋼製なので、該部分積層ゴム体を重ね合わせて適宜の数の接合ボルト36cにて接合することにより、積層ゴム体31を簡便に製造できる。
【0025】
[第4実施形態に係る水平力分散支承装置40]
次に図12は本発明の第4実施形態に係る水平力分散支承装置40(フランジ孔46aにストッパブロック47bが嵌合されるもの)を表す図であり、図13及び図14は図12に示す水平力分散支承装置40を構成する積層ゴム体41を表す図である。この第4実施形態に係る水平力分散支承装置40は、第2実施形態に係る水平力分散支承装置20と同様に、複数層の補強板を内蔵する積層ゴム体41と、該積層ゴム体41の下面に固着される下沓47と、該積層ゴム体41の上面に固着される上沓と、を備え、下部構造物である橋台と上部構造物である橋桁の間に設置されるものであるが、第2実施形態に係る水平力分散支承装置20と異なり、積層ゴム体41の側面からフランジ状に露出する厚板補強板である中間厚鋼板46の平面部にフランジ孔46aを設け、該フランジ孔に対応する位置に設けられるストッパブロック47bが嵌合される点に特徴があり、ここでは該中間厚鋼板46の左右方向(橋軸直角方向)にフランジ孔46aを設けると共に、下沓47の左右にストッパブロック47b,47bを設けて、該フランジ孔46aとストッパブロック47bを嵌合している。
【0026】
この水平力分散支承装置40によれば、鉛直方向については、積層ゴム体41の全厚が有効厚として作用するので、鉛直剛性は低く維持される。一方、水平方向については、中間厚鋼板46に設けられたフランジ孔46aの内面がストッパブロック47bに接触することにより、積層ゴム体21の片側(ここでは下側)が確実に拘束され、該積層ゴム体21の反対側(ここでは上側)のみが自由に動いて水平変位に対応するので、水平剛性を高めることができる。このようにフランジ孔46aに嵌合されたストッパブロック47bが該フランジ孔46aにおける対向する二面に接触するので、水平変位を抑制する力を二分割として、該ストッパブロック47bをコンパクトに構成することができる。なお変形例に係る水平力分散支承装置10’と同様に、上沓からストッパブロックを突設するようにしても良い。また第3実施形態に係る水平力分散支承装置30と同様に、下側部分積層ゴム体の下側フランジ板と上側部分積層ゴム体の上側フランジ板を接合ボルトにて接合することにより積層ゴム体を構成するようにしても良い。
【0027】
[第5実施形態に係る水平力分散支承装置50]
次に図15は本発明の第5実施形態に係る水平力分散支承装置50(ストッパブロック57bが前後左右に設けられたもの)を表す図である。この第5実施形態に係る水平力分散支承装置50は、第1実施形態に係る水平力分散支承装置10と同様に、複数層の補強板を内蔵する積層ゴム体51と、該積層ゴム体51の下面に固着される下沓57と、該積層ゴム体51の上面に固着される上沓と、を備え、下部構造物である橋台と上部構造物である橋桁の間に設置されるものであるが、第1実施形態に係る水平力分散支承装置10と異なり、ストッパブロック57bが厚板補強板である中間厚鋼板56の前後左右に対向する位置に設けられる点に特徴があり、ここでは下沓57の前後左右にストッパブロック57b,57b,57b,57bを設けている。
【0028】
この水平力分散支承装置50によれば、鉛直方向については、積層ゴム体51の全厚が有効厚として作用するので、鉛直剛性は低く維持される。一方、水平方向については、中間厚鋼板56がストッパブロック57bに接触することにより、積層ゴム体51の片側(ここでは下側)が確実に拘束され、該積層ゴム体51の反対側(ここでは上側)のみが自由に動いて水平変位に対応するので、水平剛性を高めることができる。このように下沓57の前後左右にストッパブロック57b,57b,57b,57bを設けたので、前後方向(橋軸方向)及び左右方向(橋軸直角方向)について、水平剛性を高めることができる。なお変形例に係る水平力分散支承装置10’と同様に、上沓からストッパブロックを突設するようにしても良い。また第2実施形態に係る水平力分散支承装置20と同様に、中間厚鋼板を積層ゴム体の側面からフランジ状に露出させ、該中間厚鋼板の前後左右に切欠を設けて、前後左右に設けられたストッパブロック57b,57b,57b,57bを該切欠に嵌合するようにしても良い。また第3実施形態に係る水平力分散支承装置30と同様に、下側部分積層ゴム体の下側フランジ板と上側部分積層ゴム体の上側フランジ板を接合ボルトにて接合することにより積層ゴム体を構成するようにしても良い。さらに第4実施形態に係る水平力分散支承装置40と同様に、中間厚鋼板を積層ゴム体の側面からフランジ状に露出させ、該中間厚鋼板の前後左右にフランジ孔を設けて、前後左右に設けられたストッパブロック57b,57b,57b,57bを該フランジ孔に嵌合するようにしても良い。
【0029】
[第6実施形態に係る水平力分散支承装置60]
次に図17は本発明の第6実施形態に係る水平力分散支承装置60(内部孔61aにストッパブロック57bが嵌合されるもの)を表す図であり、図18及び図19は図17に示す水平力分散支承装置60を構成する積層ゴム体61を表す図である。この第6実施形態に係る水平力分散支承装置60は、第1実施形態に係る水平力分散支承装置10と同様に、複数層の補強板を内蔵する積層ゴム体61と、該積層ゴム体61の下面に固着される下沓67と、該積層ゴム体61の上面に固着される上沓と、を備え、下部構造物である橋台と上部構造物である橋桁の間に設置されるものであるが、第1実施形態に係る水平力分散支承装置10と異なり、積層ゴム体61の下面から厚板補強板である中間厚鋼板66に至るように内部孔61aを設け、該内部孔61aに対応する位置に設けられるストッパブロック67bが嵌合される点に特徴があり、ここでは積層ゴム体61の中央において下面から中間厚鋼板66に至る矩形の内部孔61aを設けると共に、下沓67の中央において中間厚鋼板66に至る矩形のストッパブロック67bを設けて、該内部孔61aとストッパブロック67bを嵌合している。
【0030】
次に図20は図17に示す水平力分散支承装置60の作用を表す橋軸方向の断面図である。この水平力分散支承装置60によれば、鉛直方向については、積層ゴム体61の全厚が有効厚として作用するので、鉛直剛性は低く維持される。一方、水平方向については、中間厚鋼板66がストッパブロック67bに接触することにより、積層ゴム体61の片側(ここでは下側)が確実に拘束され、該積層ゴム体61の反対側(ここでは上側)のみが自由に動いて水平変位に対応するので、水平剛性を高めることができる。なお積層ゴム体の上面から中間厚鋼板に至るように内部孔を設けると共に、変形例に係る水平力分散支承装置10’と同様に、該内部孔に対応する位置に上沓からストッパブロックを突設し、該内部孔とストッパブロックを嵌合するようにしても良い。
【0031】
[第7実施形態に係る水平力分散支承装置70]
次に図21は本発明の第7実施形態に係る水平力分散支承装置70(中間厚鋼板76とストッパブロック77bとの間に所定の隙間Sが設けられたもの)を表す図である。この第7実施形態に係る水平力分散支承装置70は、第1実施形態に係る水平力分散支承装置10と同様に、複数層の補強板を内蔵する積層ゴム体と、該積層ゴム体の下面に固着される下沓77と、該積層ゴム体の上面に固着される上沓と、を備え、下部構造物である橋台と上部構造物である橋桁の間に設置されるものであるが、第1実施形態に係る水平力分散支承装置10と異なり、厚板補強板である中間厚鋼板76とストッパブロック77bとの間に所定の隙間Sが設けられている点に特徴がある。
【0032】
次に図22及び図23は図21に示す水平力分散支承装置70の作用を表す橋軸方向の断面図である。この水平力分散支承装置70によれば、鉛直方向については、積層ゴム体の全厚が有効厚として作用するので、鉛直剛性は低く維持される。一方、水平方向については、一定の水平変位(例えば通常時の水平変位)に対しては、図22に示すように、積層ゴム体の片側(図21では下側)も隙間Sの範囲内で水平変位に追随するので水平剛性が低くなり、それ以上の水平変位(例えば地震時の水平変位)に対しては、図23に示すように、該積層ゴム体の反対側(図21では上側)のみが隙間Sの範囲を越えて水平変位に追随するので水平剛性が高くなるという、バイリニア機能を実現できる。なお、この第7実施形態に係る水平力分散支承装置70の技術は、第1実施形態に係る水平力分散支承装置10〜第6実施形態に係る水平力分散支承装置60のいずれにも適用可能である。
【0033】
[変形例]
最後に、本発明の変形例について説明する。
【0034】
上記の実施形態では、構造物が橋梁であり、下部構造物が橋台1であり、上部構造物が橋桁2である例について説明したが、これに限らず、構造物が建物であっても本発明は適用可能である。また上記の実施形態では、橋桁2が鋼桁である例について説明したが、これに限らず、該橋桁2はコンクリート桁でも良い。さらに上記の実施形態では、積層ゴム体が平面視で矩形を呈するものである例について説明したが、これに限らず、該積層ゴム体は平面視で円形を呈するものでも良い。
【0035】
上記の実施形態では、中間厚鋼板の厚さが40mm程度である例について説明したが、これに限らず、該中間厚鋼板の厚さは設計上22mm〜40mm程度に構成するのが適当である。また上記の実施形態では、中間厚鋼板が積層ゴム体の全厚における中間に設けられて、該積層ゴム体の下半分(又は上半分)が拘束され、該積層ゴム体の上半分(又は下半分)が自由に動いて水平変位に対応する例について説明したが、これに限らず、積層ゴム体の全厚における1/2〜3/4が拘束され、積層ゴム体の全厚における1/2〜1/4が自由に動いて水平変位に対応するように構成するのが適当である。
【0036】
【発明の効果】
本発明に係る水平力分散支承装置によれば、積層ゴム体11の全厚が有効厚として作用し、鉛直剛性を低く維持することができるので、回転機能を妨げることがなく、また厚板補強板がストッパブロックに接触して積層ゴム体の片側が確実に拘束され該積層ゴム体の反対側のみが自由に動いて水平変位に対応し、水平剛性を高めることができるので、構造物に悪影響を及ぼすことがないと共に、装置の大型化を防止できるので、コストの上昇や施工の煩雑化を招くこともない。
【図面の簡単な説明】
【図1】図1は本発明の第1実施形態に係る水平力分散支承装置(下沓からストッパブロックが突設されるもの)を表す橋軸直角方向の正面図及び断面図(図3のA−A断面図)である。
【図2】図2は図1に示す水平力分散支承装置を表す橋軸方向の断面図(図3のB−B断面図)である。
【図3】図3は図1に示す水平力分散支承装置を表す平面図(図2のC−C矢視図)である。
【図4】図4は図1〜図3に示す水平力分散支承装置の作用を表す橋軸方向の断面図である。
【図5】図5は本発明の第1実施形態に係る水平力分散支承装置の変形例(上沓からストッパブロックが突設されるもの)を表す橋軸直角方向の正面図及び断面図である。
【図6】図6は図5に示す水平力分散支承装置を表す橋軸方向の断面図である。
【図7】図7は本発明の第2実施形態に係る水平力分散支承装置(中間厚鋼板が積層ゴム体の側面からフランジ状に露出されるもの)を表す橋軸直角方向の正面図及び断面図である。
【図8】図8は図7に示す水平力分散支承装置を構成する積層ゴム体を表す断面図である。
【図9】図9は図7に示す水平力分散支承装置を構成する積層ゴム体を表す平面図である。
【図10】図10は本発明の第3実施形態に係る水平力分散支承装置(下側部分積層ゴム体の下側フランジ板と上側部分積層ゴム体の上側フランジ板がボルトにて接合されるもの)を構成する積層ゴム体を表す断面図である。
【図11】図11は図10に示す水平力分散支承装置を構成する積層ゴム体を表す平面図である。
【図12】図12は本発明の第4実施形態に係る水平力分散支承装置(フランジ孔にストッパブロックが嵌合されるもの)を表す橋軸直角方向の正面図及び断面図である。
【図13】図13は図12に示す水平力分散支承装置を構成する積層ゴム体を表す断面図である。
【図14】図14は図12に示す水平力分散支承装置を構成する積層ゴム体を表す平面図である。
【図15】図15は本発明の第5実施形態に係る水平力分散支承装置(ストッパブロックが前後左右に設けられたもの)を表す橋軸直角方向の正面図及び断面図である。
【図16】図16は図15に示す水平力分散支承装置を表す平面図である。
【図17】図17は本発明の第6実施形態に係る水平力分散支承装置(内部孔にストッパブロックが嵌合されるもの)を表す橋軸方向の断面図である。
【図18】図18は図17に示す水平力分散支承装置を構成する積層ゴム体を表す断面図である。
【図19】図19は図17に示す水平力分散支承装置を構成する積層ゴム体を表す平面図である。
【図20】図20は図17に示す水平力分散支承装置の作用を表す橋軸方向の断面図である。
【図21】図21は本発明の第7実施形態に係る水平力分散支承装置(中間厚鋼板とストッパブロックとの間に所定の隙間が設けられたもの)を表す橋軸方向の断面図である。
【図22】図22は図21に示す水平力分散支承装置の作用を表す橋軸方向の断面図である。
【図23】図23は図22に続く図である。
【符号の説明】
1…橋台
1a…アンカーボルト
2…橋桁
2a…締結ボルト
2b…ソールプレート
2c…剪断キー
10…(第1実施形態に係る)水平力分散支承装置
11…積層ゴム体
12…ゴム板
13…薄鋼板
14…上厚鋼板
15…下厚鋼板
16…中間厚鋼板
17…下沓
17a…取付ボルト
17b…ストッパブロック
18…上沓
18a…取付ボルト
18b…ストッパブロック
20…(第2実施形態に係る)水平力分散支承装置
21…積層ゴム体
26…中間厚鋼板
26a…切欠
27…下沓
27b…ストッパブロック
30…(第3実施形態に係る)水平力分散支承装置
31…積層ゴム体
31a…下側部分積層ゴム体
31b…上側部分積層ゴム体
36…中間厚鋼板
36a…下側フランジ板
36b…上側フランジ板
36c…接合ボルト
36d…切欠
40…(第4実施形態に係る)水平力分散支承装置
41…積層ゴム体
46…中間厚鋼板
46a…フランジ孔
47…下沓
47b…ストッパブロック
50…(第5実施形態に係る)水平力分散支承装置
51…積層ゴム体
56…中間厚鋼板
57…下沓
57b…ストッパブロック
60…(第6実施形態に係る)水平力分散支承装置
61…積層ゴム体
61a…内部孔
66…中間厚鋼板
67…下沓
67b…ストッパブロック
70…(第7実施形態に係る)水平力分散支承装置
76…中間厚鋼板
77…下沓
77b…ストッパブロック
S…隙間
[0001]
BACKGROUND OF THE INVENTION
The present invention comprises a laminated rubber body containing a plurality of layers of reinforcing plates, a lower collar fixed to the lower surface of the laminated rubber body, and an upper collar fixed to the upper surface of the laminated rubber body. This is related to a horizontal force dispersion support device installed between an object and a superstructure, and in particular, keeping the vertical rigidity low does not hinder the rotation function, and increasing the horizontal rigidity may adversely affect the structure. The present invention relates to a horizontal force dispersion support device.
[0002]
[Prior art]
Conventionally, in a structure such as a bridge or a building, a rubber plate and a rigid plate are interposed between the lower structure and the upper structure in order to reliably transmit the inertial force acting on the upper structure to the lower structure. Is provided with a horizontal force dispersion support device including laminated rubber bodies laminated alternately over a plurality of layers. This horizontal force dispersion support device has a load support function for supporting the load acting on the superstructure, a rotation function for following the strain caused by the vertical rotation of the superstructure, and the normal structure of the superstructure. A horizontal movement function to follow the horizontal displacement during an earthquake is required. In other words, the horizontal force distribution bearing device is required to have low vertical rigidity in the vertical direction so that it can easily follow the strain caused by the vertical rotation of the upper structure. High horizontal rigidity is required so that excessive horizontal displacement can be easily suppressed.
[0003]
[Problems to be solved by the invention]
Here, in the horizontal force dispersion bearing device provided with a laminated rubber body, since the bearing area is larger than that of the metal bearing, the amount of strain due to the vertical rotation of the upper structure is increased, and a rotation function that follows the strain amount is obtained. Since the thickness of the laminated rubber body is increased, the horizontal rigidity is lowered, and the horizontal displacement of the upper structure during an earthquake is excessively increased, which adversely affects the structure. However, if the bearing area is further increased in order to increase the horizontal rigidity, the thickness of the laminated rubber body is further increased in order to obtain the rotation function accompanying the increase in the bearing area, and the horizontal force distribution bearing device is large. Therefore, the cost increases and the construction becomes complicated. That is, in the horizontal force dispersion support device, the vertical performance and the horizontal performance are in a trade-off relationship.
[0004]
The present invention has been made based on such a background. The purpose of the present invention is to prevent an increase in the size of the apparatus and to maintain the horizontal rigidity without hindering the rotation function by maintaining the vertical rigidity low. It is an object of the present invention to provide a horizontal force dispersion supporting device that does not adversely affect the structure by being raised.
[0005]
[Means for Solving the Problems]
The present invention adopts the following means in order to solve the above problems. In addition, although the code | symbol in drawing is attached for reference, this invention is not limited by this drawing.
[0006]
First, the invention according to claim 1 includes a plurality of layers of reinforcing plates (thin steel plate 13, upper thick steel plate 14, lower thick steel plate 15, and intermediate thick steel plate 16) as shown in FIGS. Molded in one piece A laminated rubber body 11, a lower collar 17 fixed to the lower surface of the laminated rubber body, and an upper collar 18 fixed to the upper surface of the laminated rubber body, are provided with a lower structure (abutment 1) and an upper structure ( Horizontal force distribution bearing device installed between bridge girders 2) Because , Of the laminated rubber body Among the multi-layer reinforcing plates, A predetermined layer of intermediate layers excluding the upper layer and the lower layer Reinforcing plate according to other Intermediate Thicker than the reinforcing plate (thin steel plate 13) according to the layer Middle Thick plate reinforcing plate (intermediate thick steel plate 16), The upper thick plate reinforcing plate (upper layer) is thicker than the reinforcing plate (thin steel plate 13) related to the other intermediate layer. The reinforcing plate related to the lower layer fixed to the lower arm among the plurality of reinforcing plates is thicker than the reinforcing plate (thin steel plate 13) related to the other intermediate layer. A thick reinforcing plate (lower thick steel plate 15) was formed integrally with the laminated rubber body. Said Middle Opposing to thick plate reinforcement plate (intermediate thick steel plate 16) Can touch Stopper block 17b from either the lower eyelid or the upper eyelid to the position But Projecting Is , In the laminated rubber body, the total thickness acts as an effective thickness in the vertical direction to lower the vertical rigidity, and in the horizontal direction, either the upper side or the lower side from the contact position by contacting the stopper block. The horizontal side was increased by restraining the side of This is a horizontal force dispersion support device 10 characterized by the above.
[0007]
Further, the invention according to claim 2 is the horizontal force distribution support device according to claim 1, wherein, as shown in FIGS. Middle The thick plate reinforcing plate (intermediate thick steel plate 26) is a horizontal force dispersion support device 20 that can be exposed in a flange shape from the side surface of the laminated rubber body 21.
[0008]
The invention according to claim 3 is the horizontal force distribution support device according to claim 2, wherein the laminated rubber body 31 incorporates a plurality of layers of reinforcing plates as shown in FIGS. The upper partial laminated rubber body 31b includes a lower partial laminated rubber body 31a and an upper partial laminated rubber body 31b incorporating a plurality of layers of reinforcing plates. The upper partial laminated rubber body 31b includes the upper thick plate reinforcing plate and the multi-layered reinforcing plate. A lower flange plate 36b that is thicker and larger than the reinforcing plate according to the other intermediate layer, and the lower partial laminated rubber body 31a includes a lower flange plate 36b. The lower thick plate reinforcing plate and the reinforcing plate according to the upper layer of the plurality of layers of reinforcing plates, the upper flange plate 36a being thicker and larger than the reinforcing plate according to the other intermediate layer And The lower flange plate 36b and the upper flange plate 36a are joined with bolts, so that the flange exposed from the side surface of the laminated rubber body. Middle This is a horizontal force dispersion support device 30 that constitutes a thick plate reinforcing plate (medium-thick steel plate 36).
[0009]
The invention according to claim 4 is the horizontal force distribution support device according to claim 2 or 3, wherein 8 As shown in FIG. The intermediate thick plate reinforcing plate (intermediate thick steel plates 26, 36, 46) is provided with a notch 26a or a flange hole 46a in the exposed flat portion, and the stopper blocks 27b, 47b. Is Notch or above In the position corresponding to the flange hole What can be fitted Horizontal force distribution bearing device characterized by being 20, 30, 40.
[0010]
The invention according to claim 5 is the horizontal force distribution support device according to any one of claims 1 to 4, wherein the stopper block 57b includes the stopper block 57b as shown in FIGS. Middle It is provided at a position facing the front, rear, left and right of the thick plate reinforcing plate (intermediate thick steel plate 56). Have This is a horizontal force distribution support device 50.
[0011]
The invention according to claim 6 is the horizontal force distribution support device according to claim 1, as shown in FIGS. In the laminated rubber body 61, From the bottom or top surface of the laminated rubber body Middle An internal hole 61a is provided so as to reach the thick plate reinforcing plate (intermediate thick steel plate 66), The stopper block 67b is At a position corresponding to the internal hole It is provided so that it can be fitted. This is a horizontal force distribution support device 60.
[0012]
Furthermore, the invention according to claim 7 is the horizontal force distribution support device according to any one of claims 1 to 6, wherein, as shown in FIGS. Middle A predetermined gap S is provided between the thick plate reinforcing plate (intermediate thick steel plate 76) and the stopper block 77b. Have This is a horizontal force distribution support device 70 characterized by the above.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention comprises a laminated rubber body containing a plurality of layers of reinforcing plates, a lower collar fixed to the lower surface of the laminated rubber body, and an upper collar fixed to the upper surface of the laminated rubber body. Horizontal force distribution bearing devices 10, 20, 30, 40, 50, 60, 70 installed between the object and the superstructure. In the following, an example in which the horizontal force distribution support device is applied to a multi-span continuous girder bridge composed of a concrete abutment 1 as a lower structure and a steel bridge girder 2 as an upper structure. explain. In the following, the bridge axis direction is referred to as front and rear, and the direction perpendicular to the bridge axis is referred to as right and left.
[0014]
The horizontal force distribution support device according to the present invention includes the horizontal force distribution support device 10 according to the first embodiment, the horizontal force distribution support device 20 according to the second embodiment, and the horizontal force distribution support device according to the third embodiment. 30, Horizontal force distribution support device according to the fourth embodiment 40 , A horizontal force distribution support device 50 according to the fifth embodiment, a horizontal force distribution support device 60 according to the sixth embodiment, and a horizontal force distribution support device 70 according to the seventh embodiment. In the following, the horizontal force distribution support device 10 according to the first embodiment to the horizontal force distribution support device 70 according to the seventh embodiment will be described in order. Further, in the following, in each embodiment, the same terms are used for the constituent elements having the same functions, and detailed description thereof is omitted, and the first digit of the reference numerals in the drawings is the same. On the other hand, a number corresponding to each embodiment is a tenth digit.
[0015]
[Horizontal force distribution support device 10 according to the first embodiment]
First, FIG. 1 to FIG. 3 are views showing the horizontal force distribution support device 10 (with a stopper block 17b protruding from the lower rod 17) according to the first embodiment of the present invention. The horizontal force distribution support device 10 according to the first embodiment includes a laminated rubber body 11 containing a plurality of reinforcing plates, a lower collar 17 fixed to the lower surface of the laminated rubber body 11, and the laminated rubber body 11. And an upper gutter 18 fixed to the upper surface of the bridge, and is installed between the abutment 1 as the lower structure and the bridge girder 2 as the upper structure.
[0016]
The laminated rubber body 11 is formed by integrally vulcanizing and molding a rectangular rubber plate and a rectangular reinforcing plate alternately over a plurality of layers. Here, the material of the rubber plate is, for example, a rubber elastic body, and the material of the reinforcing plate is, for example, steel. The reinforcing plate includes a thin steel plate 13, It is an upper thick plate reinforcement plate Upper steel plate 14, Lower thick plate reinforcement plate Lower thick steel plate 15, and It is an intermediate thick plate reinforcing plate (hereinafter referred to as a thick plate reinforcing plate) An intermediate thick steel plate 16 is included. Here, the thickness of the rubber plate is, for example, about 25 mm, the thickness of the thin steel plate 13 is, for example, about 3.2 mm, and the thicknesses of the upper thick steel plate 14, the lower thick steel plate 15, and the intermediate thick steel plate 16 are, for example, 40 mm. Degree. This laminated rubber body 11 is an upper thick steel plate in order from the upper side. (Upper plate reinforcement plate) 14, rubber plate, thin steel plate 13, rubber plate, thin steel plate 13, rubber plate, intermediate thick steel plate (Thick plate reinforcement plate) 16, rubber plate, thin steel plate 13, rubber plate, thin steel plate 13, rubber plate, lower thick steel plate (Lower plate reinforcement plate) 15 is laminated and integrally vulcanized and molded. Here, in the present invention, the reinforcing plate according to any one of the plurality of reinforcing plates is a thick plate reinforcing plate (intermediate thick steel plate 16) thicker than the reinforcing plate (thin steel plate 13) according to another layer. In this respect, the intermediate thick steel plate 16 is provided in the middle of the total thickness of the laminated rubber body 11.
[0017]
In this laminated rubber body 11, the upper thick steel plate 14 is fixed to the upper flange 18 by an appropriate number of mounting bolts 18a, and the lower thick steel plate 15 is fixed to the lower flange 17 by an appropriate number of mounting bolts 17a. A distributed bearing device 10 is configured. In the horizontal force distribution support device 10, the lower rod 17 is fixed to the abutment 1 by an appropriate number of anchor bolts 1a, and the sole plate 2b fastened to the bridge girder 2 by an appropriate number of fastening bolts 2a via a shear key 2c. Thus, the horizontal rod 18 is connected to the bridge 18 and the horizontal force distribution support device 10 is installed on the bridge. Here, the present invention is characterized in that the stopper block 17b protrudes (starts up) from the lower rod 17 to a position facing the intermediate thick steel plate 16, and here, the stopper blocks 17b, 17b is provided.
[0018]
Next, FIG. 4 is a cross-sectional view in the direction of the bridge axis showing the operation of the horizontal force dispersion support device 10 shown in FIGS. According to this horizontal force dispersion support device 10, in the vertical direction, the total thickness of the laminated rubber body 11 acts as an effective thickness, so that the vertical rigidity is kept low. On the other hand, in the horizontal direction, when the intermediate thick steel plate 16 comes into contact with the stopper block 17b, one side (here, the lower side) of the laminated rubber body 11 is securely restrained, and the opposite side (here, the laminated rubber body 11). Since only the upper side moves freely to cope with horizontal displacement, the horizontal rigidity can be increased.
[0019]
Next, FIGS. 5 and 6 are views showing a modified example of the horizontal force dispersion support device 10 ′ according to the first embodiment of the present invention (in which a stopper block protrudes from the upper collar). Similar to the horizontal force distribution support device 10 according to the first embodiment, the horizontal force distribution support device 10 ′ according to this modification includes a laminated rubber body 11 containing a plurality of layers of reinforcing plates, and the laminated rubber body 11. A lower rod 17 fixed to the lower surface and an upper rod 18 fixed to the upper surface of the laminated rubber body 11 are provided between the abutment 1 as the lower structure and the bridge girder 2 as the upper structure. However, unlike the horizontal force distribution support device 10 according to the first embodiment, the feature is that the stopper block 18b is protruded (fallen) from the upper collar 18 to a position facing the intermediate thick steel plate 16. Yes, here, stopper blocks 18b, 18b are provided before and after the upper collar 18.
[0020]
According to the horizontal force dispersion support device 10 ', the vertical rigidity is kept low in the vertical direction because the total thickness of the laminated rubber body 11 acts as an effective thickness. On the other hand, in the horizontal direction, when the intermediate thick steel plate 16 comes into contact with the stopper block 18b, one side (here, the upper side) of the laminated rubber body 11 is reliably restrained, and the opposite side (here, the lower side) of the laminated rubber body 11 is secured. Since only the side) moves freely to cope with the horizontal displacement, the horizontal rigidity can be increased.
[0021]
[Horizontal force distribution support device 20 according to the second embodiment]
Next, FIG. 7 is a view showing a horizontal force distribution support device (in which the intermediate thick steel plate is exposed in a flange shape from the side surface of the laminated rubber body) according to the second embodiment of the present invention, and FIGS. It is a figure showing the laminated rubber body 21 which comprises the horizontal force dispersion | distribution support apparatus 20 shown in FIG. Similar to the horizontal force distribution support device 10 according to the first embodiment, the horizontal force distribution support device 20 according to the second embodiment includes a laminated rubber body 21 containing a plurality of layers of reinforcing plates, and the laminated rubber body 21. And a lower rod 27 fixed to the lower surface of the laminated rubber body 21 and an upper rod fixed to the upper surface of the laminated rubber body 21, and is installed between the abutment as the lower structure and the bridge girder as the upper structure. However, unlike the horizontal force distribution support device 10 according to the first embodiment, there is a feature in that the intermediate thick steel plate 26 that is a thick plate reinforcing plate is exposed in a flange shape from the side surface of the laminated rubber body 21. Notches 26a, 26a are provided in the left-right direction (the direction perpendicular to the bridge axis) of the intermediate thick steel plate 26, and stopper blocks 27b, 27b are provided on the left and right of the lower rod 27, and the notch 26a and the stopper block 27b are fitted together. Yes.
[0022]
According to the horizontal force dispersion support device 20, in the vertical direction, the total thickness of the laminated rubber body 21 acts as an effective thickness, so that the vertical rigidity is kept low. On the other hand, in the horizontal direction, the inner surface of the notch 26a provided in the intermediate thick steel plate 26 comes into contact with the stopper block 27b, so that one side (here, the lower side) of the laminated rubber body 21 is reliably restrained. Since only the opposite side (the upper side in this case) of the body 21 moves freely to cope with the horizontal displacement, the horizontal rigidity can be increased. In this way, not in the front-rear direction (bridge axis direction) but in the left-right direction (bridge axis perpendicular direction) Restrainable Since the stopper block 27a is provided, the horizontal force distribution support device 20 can be installed even if the space in the front-rear direction is narrow. In addition, you may make it project a stopper block from an upper collar like the horizontal force dispersion | distribution support apparatus 10 'which concerns on a modification.
[0023]
[Horizontal force distribution support device 30 according to the third embodiment]
Next, FIG. 10 and FIG. 11 show horizontal force distribution bearing devices according to the third embodiment of the present invention (the lower flange plate 36a of the lower partial laminated rubber body 31a and the upper flange plate 36b of the upper partial laminated rubber body 31b are joined together. It is a figure showing the laminated rubber body 31 which comprises what is joined with the volt | bolt 36c. The horizontal force distribution support device 30 according to the third embodiment uses a laminated rubber body 31 instead of the laminated rubber body 21 in the horizontal force distribution support device 20 according to the second embodiment.
[0024]
The laminated rubber body 31 contains a plurality of layers of reinforcing plates, and a lower partial laminated rubber body 31a having a lower flange plate 36a that is larger than the reinforcing plate fixed to the upper surface, and a plurality of layers of reinforcing plates. And an upper partial laminated rubber body 31b having an upper flange plate 36b larger than the reinforcing plate fixed to the lower surface, and the lower flange plate 36a and the upper flange plate 36b are joined together by a joining bolt 36c. An intermediate thick steel plate 36 which is a thick plate reinforcing plate exposed in a flange shape from the side surface of the rubber body 31 is configured. Here, notches 36d and 36d are formed in the left-right direction (perpendicular to the bridge axis) of the intermediate thick steel plate 36. Is provided. Here, the lower partial laminated rubber body 31a and the upper partial laminated rubber body 31b are upside down, The lower flange plate 36a and the upper flange plate 36b Same Shape Since it is made of steel, the laminated rubber body 31 can be easily manufactured by superposing the partially laminated rubber bodies and joining them with an appropriate number of joining bolts 36c.
[0025]
[Horizontal force distribution support device 40 according to the fourth embodiment]
Next, FIG. 12 is a view showing a horizontal force distribution support device 40 (in which a stopper block 47b is fitted to the flange hole 46a) according to the fourth embodiment of the present invention, and FIGS. It is a figure showing the laminated rubber body 41 which comprises the horizontal force dispersion | distribution support apparatus 40 shown. Similar to the horizontal force distribution support device 20 according to the second embodiment, the horizontal force distribution support device 40 according to the fourth embodiment includes a laminated rubber body 41 containing a plurality of layers of reinforcing plates, and the laminated rubber body 41. And a lower rod 47 fixed to the lower surface of the laminated rubber body 41 and an upper rod fixed to the upper surface of the laminated rubber body 41, and is installed between the abutment as the lower structure and the bridge girder as the upper structure. However, unlike the horizontal force distribution support device 20 according to the second embodiment, a flange hole 46a is provided in the flat portion of the intermediate thick steel plate 46 which is a thick plate reinforcing plate exposed in a flange shape from the side surface of the laminated rubber body 41, There is a feature in that a stopper block 47b provided at a position corresponding to the flange hole is fitted. Here, a flange hole 46a is provided in the left-right direction (perpendicular to the bridge axis) of the intermediate thick steel plate 46, and Stopper blow on left and right of 47 Click 47b, and 47b are provided, is fitted to the flange holes 46a and the stopper block 47b.
[0026]
According to the horizontal force dispersion support device 40, the vertical rigidity is kept low in the vertical direction because the total thickness of the laminated rubber body 41 acts as an effective thickness. On the other hand, in the horizontal direction, the inner surface of the flange hole 46a provided in the intermediate thick steel plate 46 comes into contact with the stopper block 47b, so that one side (here, the lower side) of the laminated rubber body 21 is reliably restrained. Since only the opposite side (the upper side in this case) of the rubber body 21 moves freely to cope with the horizontal displacement, the horizontal rigidity can be increased. Since the stopper block 47b fitted in the flange hole 46a contacts the two opposing surfaces in the flange hole 46a in this manner, the stopper block 47b is made compact by dividing the force for suppressing the horizontal displacement into two parts. Can do. In addition, you may make it project a stopper block from an upper collar like the horizontal force dispersion | distribution support apparatus 10 'which concerns on a modification. Similarly to the horizontal force distribution support device 30 according to the third embodiment, a laminated rubber body is formed by joining the lower flange plate of the lower partial laminated rubber body and the upper flange plate of the upper partial laminated rubber body with a joining bolt. You may make it comprise.
[0027]
[Horizontal force distribution support device 50 according to the fifth embodiment]
Next, FIG. 15 is a diagram showing a horizontal force distribution support device 50 (with stopper blocks 57b provided on the front, rear, left and right) according to a fifth embodiment of the present invention. Similar to the horizontal force distribution support device 10 according to the first embodiment, the horizontal force distribution support device 50 according to the fifth embodiment includes a laminated rubber body 51 containing a plurality of reinforcing plates, and the laminated rubber body 51. A lower rod 57 fixed to the lower surface of the laminated rubber body 51 and an upper rod fixed to the upper surface of the laminated rubber body 51, and is installed between the abutment as the lower structure and the bridge girder as the upper structure. However, unlike the horizontal force distribution support device 10 according to the first embodiment, there is a feature in that the stopper block 57b is provided at a position facing the front, rear, left and right of the intermediate thick steel plate 56 which is a thick plate reinforcing plate. Stopper blocks 57b, 57b, 57b, 57b are provided on the front, rear, left and right of the lower collar 57.
[0028]
According to the horizontal force dispersion support device 50, the vertical rigidity is kept low in the vertical direction because the total thickness of the laminated rubber body 51 acts as an effective thickness. On the other hand, in the horizontal direction, when the intermediate thick steel plate 56 comes into contact with the stopper block 57b, one side (here, the lower side) of the laminated rubber body 51 is securely restrained, and the opposite side (here, the laminated rubber body 51). Since only the upper side moves freely to cope with horizontal displacement, the horizontal rigidity can be increased. Since the stopper blocks 57b, 57b, 57b, 57b are thus provided on the front, rear, left and right of the lower rod 57, the horizontal rigidity can be enhanced in the front-rear direction (bridge axis direction) and the left-right direction (bridge axis perpendicular direction). In addition, you may make it project a stopper block from an upper collar like the horizontal force dispersion | distribution support apparatus 10 'which concerns on a modification. Further, similarly to the horizontal force distribution support device 20 according to the second embodiment, the intermediate thick steel plate is exposed in a flange shape from the side surface of the laminated rubber body, and notches are provided on the front, rear, left and right of the intermediate thick steel plate to The stopper blocks 57b, 57b, 57b, 57b thus formed may be fitted into the notches. Similarly to the horizontal force distribution support device 30 according to the third embodiment, a laminated rubber body is formed by joining the lower flange plate of the lower partial laminated rubber body and the upper flange plate of the upper partial laminated rubber body with a joining bolt. You may make it comprise. Further, similarly to the horizontal force distribution support device 40 according to the fourth embodiment, the intermediate thick steel plate is exposed in a flange shape from the side surface of the laminated rubber body, and flange holes are provided on the front, rear, left and right of the intermediate thick steel plate, The provided stopper blocks 57b, 57b, 57b, 57b may be fitted into the flange holes.
[0029]
[Horizontal force distribution support device 60 according to the sixth embodiment]
Next, FIG. 17 is a view showing a horizontal force distribution support device 60 (in which the stopper block 57b is fitted in the internal hole 61a) according to the sixth embodiment of the present invention, and FIGS. 18 and 19 are shown in FIG. It is a figure showing the laminated rubber body 61 which comprises the horizontal force dispersion | distribution support apparatus 60 shown. Similar to the horizontal force distribution support device 10 according to the first embodiment, the horizontal force distribution support device 60 according to the sixth embodiment includes a laminated rubber body 61 containing a plurality of layers of reinforcing plates, and the laminated rubber body 61. A lower rod 67 fixed to the lower surface of the laminated rubber body 61 and an upper rod fixed to the upper surface of the laminated rubber body 61 are installed between the abutment as the lower structure and the bridge girder as the upper structure. However, unlike the horizontal force distribution support device 10 according to the first embodiment, an internal hole 61a is provided from the lower surface of the laminated rubber body 61 to the intermediate thick steel plate 66 that is a thick plate reinforcing plate, and the internal hole 61a is provided in the internal hole 61a. The stopper block 67b provided at the corresponding position is fitted, and here, a rectangular internal hole 61a extending from the lower surface to the intermediate thick steel plate 66 is provided at the center of the laminated rubber body 61, and Intermediate thick steel plate 6 in the center Rectangular stopper block 67b leading to provided, fitted with internal hole 61a and the stopper block 67b.
[0030]
Next, FIG. 20 is a cross-sectional view in the bridge axis direction showing the operation of the horizontal force dispersion support device 60 shown in FIG. According to the horizontal force distribution support device 60, the vertical rigidity is kept low in the vertical direction because the entire thickness of the laminated rubber body 61 acts as an effective thickness. On the other hand, in the horizontal direction, when the intermediate thick steel plate 66 comes into contact with the stopper block 67b, one side (here, the lower side) of the laminated rubber body 61 is reliably restrained, and the opposite side (here, the laminated rubber body 61). Since only the upper side moves freely to cope with horizontal displacement, the horizontal rigidity can be increased. An internal hole is provided so as to reach the intermediate thick steel plate from the upper surface of the laminated rubber body, and a stopper block is projected from the upper collar to a position corresponding to the internal hole in the same manner as in the horizontal force distribution support device 10 ′ according to the modification. And the inner hole may be fitted to the stopper block.
[0031]
[Horizontal force distribution support device 70 according to the seventh embodiment]
Next, FIG. 21 is a diagram showing a horizontal force distribution support device 70 (with a predetermined gap S provided between the intermediate thick steel plate 76 and the stopper block 77b) according to the seventh embodiment of the present invention. Similar to the horizontal force distribution support device 10 according to the first embodiment, the horizontal force distribution support device 70 according to the seventh embodiment includes a laminated rubber body incorporating a plurality of layers of reinforcing plates, and a lower surface of the laminated rubber body. A lower gutter 77 fixed to the upper surface of the laminated rubber body, and an upper gutter fixed to the upper surface of the laminated rubber body, and is installed between the abutment that is the lower structure and the bridge girder that is the upper structure, Unlike the horizontal force distribution support device 10 according to the first embodiment, there is a feature in that a predetermined gap S is provided between the intermediate thick steel plate 76 which is a thick plate reinforcing plate and the stopper block 77b.
[0032]
Next, FIGS. 22 and 23 are cross-sectional views in the direction of the bridge axis showing the operation of the horizontal force distribution support device 70 shown in FIG. According to the horizontal force dispersion support device 70, the vertical rigidity is kept low in the vertical direction because the total thickness of the laminated rubber body acts as an effective thickness. On the other hand, in the horizontal direction, for a certain horizontal displacement (for example, normal horizontal displacement), as shown in FIG. 22, one side (the lower side in FIG. 21) of the laminated rubber body is also within the gap S. Since the horizontal displacement follows the horizontal displacement, the horizontal rigidity is lowered. For further horizontal displacement (for example, horizontal displacement during an earthquake), as shown in FIG. 23, the opposite side of the laminated rubber body (upper side in FIG. 21). Since only the horizontal displacement follows the horizontal displacement beyond the range of the gap S, a bilinear function of increasing the horizontal rigidity can be realized. The technique of the horizontal force distribution support device 70 according to the seventh embodiment is applicable to any of the horizontal force distribution support device 10 according to the first embodiment and the horizontal force distribution support device 60 according to the sixth embodiment. It is.
[0033]
[Modification]
Finally, a modification of the present invention will be described.
[0034]
In the above embodiment, an example in which the structure is a bridge, the lower structure is an abutment 1, and the upper structure is a bridge girder 2 has been described. The invention is applicable. In the above embodiment, the example in which the bridge girder 2 is a steel girder has been described. However, the present invention is not limited thereto, and the bridge girder 2 may be a concrete girder. Furthermore, in the above-described embodiment, an example in which the laminated rubber body has a rectangular shape in a plan view has been described. However, the present invention is not limited thereto, and the laminated rubber body may have a circular shape in a plan view.
[0035]
In the above-described embodiment, an example in which the thickness of the intermediate thick steel plate is about 40 mm has been described. However, the thickness of the intermediate thick steel plate is appropriately designed to be about 22 mm to 40 mm. . In the above embodiment, the intermediate thick steel plate is provided in the middle of the total thickness of the laminated rubber body, the lower half (or upper half) of the laminated rubber body is restrained, and the upper half (or lower) of the laminated rubber body. However, the present invention is not limited to this, and 1/2 to 3/4 of the total thickness of the laminated rubber body is restricted, and 1 / of the total thickness of the laminated rubber body is restricted. It is appropriate that 2 to 1/4 move freely to accommodate horizontal displacement.
[0036]
【The invention's effect】
According to the horizontal force distribution support device according to the present invention, the total thickness of the laminated rubber body 11 acts as an effective thickness, and the vertical rigidity can be kept low. The plate comes into contact with the stopper block and one side of the laminated rubber body is securely restrained, and only the opposite side of the laminated rubber body can move freely to cope with horizontal displacement and increase the horizontal rigidity, adversely affecting the structure. In addition, the increase in size of the apparatus can be prevented, so that the cost is not increased and the construction is not complicated.
[Brief description of the drawings]
FIG. 1 is a front view and a cross-sectional view (in FIG. 3) of a horizontal force distribution bearing device (with a stopper block projecting from a lower arm) according to a first embodiment of the present invention. It is AA sectional drawing.
2 is a cross-sectional view (cross-sectional view taken along the line BB in FIG. 3) in the bridge axis direction showing the horizontal force dispersion support device shown in FIG.
3 is a plan view (a view taken along the line CC in FIG. 2) of the horizontal force dispersion support device shown in FIG. 1;
FIG. 4 is a cross-sectional view in the direction of the bridge axis showing the operation of the horizontal force distribution support device shown in FIGS.
FIG. 5 is a front view and a cross-sectional view in a direction perpendicular to the bridge axis showing a modification of the horizontal force distribution support device according to the first embodiment of the present invention (in which a stopper block protrudes from the upper collar). is there.
6 is a cross-sectional view in the direction of the bridge axis showing the horizontal force distribution support device shown in FIG. 5. FIG.
FIG. 7 is a front view in a direction perpendicular to the bridge axis showing a horizontal force distribution bearing device (in which an intermediate thick steel plate is exposed in a flange shape from the side surface of a laminated rubber body) according to a second embodiment of the present invention; It is sectional drawing.
8 is a cross-sectional view showing a laminated rubber body constituting the horizontal force distribution support device shown in FIG.
FIG. 9 is a plan view showing a laminated rubber body constituting the horizontal force distribution support device shown in FIG.
FIG. 10 is a horizontal force distribution bearing device according to a third embodiment of the present invention (the lower flange plate of the lower partial laminated rubber body and the upper flange plate of the upper partial laminated rubber body are joined by bolts; It is sectional drawing showing the laminated rubber body which comprises a thing.
FIG. 11 is a plan view showing a laminated rubber body constituting the horizontal force distribution support device shown in FIG. 10;
FIGS. 12A and 12B are a front view and a cross-sectional view in a direction perpendicular to the bridge axis showing a horizontal force distribution bearing device according to a fourth embodiment of the present invention (in which a stopper block is fitted into a flange hole).
13 is a cross-sectional view showing a laminated rubber body constituting the horizontal force distribution support device shown in FIG.
14 is a plan view showing a laminated rubber body constituting the horizontal force distribution support device shown in FIG. 12. FIG.
FIGS. 15A and 15B are a front view and a cross-sectional view in a direction perpendicular to the bridge axis showing a horizontal force distribution bearing device (with stopper blocks provided on the front, rear, left and right sides) according to a fifth embodiment of the present invention.
FIG. 16 is a plan view showing the horizontal force distribution support device shown in FIG.
FIG. 17 is a cross-sectional view in a bridge axis direction showing a horizontal force distribution bearing device (with a stopper block fitted to an internal hole) according to a sixth embodiment of the present invention.
18 is a cross-sectional view showing a laminated rubber body constituting the horizontal force distribution support device shown in FIG.
FIG. 19 is a plan view showing a laminated rubber body constituting the horizontal force distribution support device shown in FIG.
FIG. 20 is a cross-sectional view in the direction of the bridge axis showing the operation of the horizontal force distribution support device shown in FIG.
FIG. 21 is a cross-sectional view in a bridge axis direction showing a horizontal force distribution support device (with a predetermined gap provided between an intermediate thick steel plate and a stopper block) according to a seventh embodiment of the present invention. is there.
22 is a cross-sectional view in the bridge axis direction showing the operation of the horizontal force distribution support device shown in FIG. 21. FIG.
FIG. 23 is a diagram subsequent to FIG.
[Explanation of symbols]
1 ... Abutment
1a ... Anchor bolt
2 ... Bridge girder
2a ... Fastening bolt
2b ... Sole plate
2c ... Shear key
10 ... Horizontal force distribution bearing device (according to the first embodiment)
11 ... Laminated rubber body
12 ... rubber plate
13. Thin steel plate
14: Upper steel plate
15 ... Lower steel plate
16 ... Intermediate steel plate
17 ... Shimojo
17a ... Mounting bolt
17b ... Stopper block
18 ...
18a ... Mounting bolt
18b ... Stopper block
20 ... Horizontal force distribution bearing device (according to the second embodiment)
21 ... Laminated rubber body
26 ... Intermediate thick steel plate
26a ... Notch
27 ... Shimojo
27b ... Stopper block
30 ... Horizontal force distribution bearing device (according to the third embodiment)
31 ... Laminated rubber body
31a ... Lower part laminated rubber body
31b ... Upper part laminated rubber body
36 ... Intermediate steel plate
36a ... Lower flange plate
36b ... Upper flange plate
36c ... Joining bolt
36d ... Notch
40 ... Horizontal force distribution bearing device (according to the fourth embodiment)
41 ... Laminated rubber body
46 ... Intermediate steel plate
46a ... Flange hole
47 ... Shimojo
47b ... Stopper block
50 ... Horizontal force distribution bearing device (according to the fifth embodiment)
51 ... Laminated rubber body
56 ... Intermediate steel plate
57 ... Shimojo
57b ... Stopper block
60 ... Horizontal force distribution bearing device (according to the sixth embodiment)
61 ... Laminated rubber body
61a ... Inner hole
66 ... Intermediate steel plate
67 ... Shimojo
67b ... Stopper block
70 ... Horizontal force distribution bearing device (according to the seventh embodiment)
76 ... Intermediate steel plate
77 ... Shimojo
77b ... Stopper block
S ... Gap

Claims (7)

複数層の補強板を内蔵し一体に成型された積層ゴム体と、
該積層ゴム体の下面に固着される下沓と、
前記積層ゴム体の上面に固着される上沓とを備え、下部構造物と上部構造物の間に設置される水平力分散支承装置であって
前記積層ゴム体の前記複数層の補強板のうち、上部の一層及び下部の一層を除く中間の層の所定の一層に係る補強板を、他の中間の層に係る補強板よりも厚い中間厚板補強板とし、
前記複数層の補強板のうちの前記上沓に固着される上部の一層に係る補強板を、前記他の中間の層に係る補強板よりも厚い上厚板補強板とし、
前記複数層の補強板のうちの前記下沓に固着される下部の一層に係る補強板を、前記他の中間の層に係る補強板よりも厚い下厚板補強板とし、
前記積層ゴム体に一体に成型された前記中間厚板補強板に対向し接触可能な位置まで、前記下沓又は前記上沓のいずれか一方からストッパブロック突設され
前記積層ゴム体は、鉛直方向には全厚が有効厚として作用して鉛直剛性を低くし、水平方向には、前記ストッパブロックと接触することにより、接触位置より上側又は下側のいずれか一方の側を拘束して、水平剛性を高めた
ことを特徴とする水平力分散支承装置。
A laminated rubber body that incorporates multiple layers of reinforcing plates and is integrally molded ;
A lower arm fixed to the lower surface of the laminated rubber body;
Wherein a upper shoe which is fixed to the upper surface of the laminated rubber body, a horizontal force-distributing bearing device installed between the lower structure and the upper structure,
Wherein among the reinforcing plate of the plurality of layers of laminated rubber body, a reinforcing plate according to an intermediate layer of a predetermined layer but one layer and one layer of the lower part of the upper, intermediate thickness thicker than the reinforcing plate according to the layers of other intermediate As a plate reinforcement plate
Among the plurality of layers of reinforcing plates, a reinforcing plate related to the upper layer fixed to the upper collar is an upper thick plate reinforcing plate thicker than the reinforcing plate related to the other intermediate layer,
Of the plurality of layers of reinforcing plates, the lower reinforcing plate according to the lower layer fixed to the lower arm is a lower thick plate reinforcing plate thicker than the reinforcing plate of the other intermediate layer,
Wherein the laminated rubber body to opposing contactable position to the intermediate thick reinforcing plate which is integrally molded, the stopper block is projected from one of the lower shoe or the upper shoe,
In the laminated rubber body, the total thickness acts as an effective thickness in the vertical direction to lower the vertical rigidity, and in the horizontal direction, either the upper side or the lower side from the contact position by contacting the stopper block. Horizontal force distribution bearing device characterized in that the horizontal rigidity is increased by restraining the side .
請求項1に記載した水平力分散支承装置であって、
前記中間厚板補強板は、前記積層ゴム体の側面からフランジ状に露出可能である
ことを特徴とする水平力分散支承装置。
A horizontal force distribution support device according to claim 1,
The horizontal thick plate supporting device, wherein the intermediate thick plate reinforcing plate can be exposed in a flange shape from a side surface of the laminated rubber body.
請求項2に記載した水平力分散支承装置であって、
前記積層ゴム体は、複数層の補強板を内蔵する下側部分積層ゴム体と、複数層の補強板を内蔵する上側部分積層ゴム体とからなり、
前記上側部分積層ゴム体は、
前記上厚板補強板と、前記複数層の補強板のうちの下部の一層に係る補強板であって、前記他の中間の層に係る補強板よりも厚く、かつ、大きい下側フランジ板とを有し、
前記下側部分積層ゴム体は、
前記下厚板補強板と、前記複数層の補強板のうちの上部の一層に係る補強板であって、前記他の中間の層に係る補強板よりも厚く、かつ、大きい上側フランジ板とを有し、
前記下側フランジ板と前記上側フランジ板をボルトにて接合することにより、前記積層ゴム体の側面からフランジ状に露出する前記中間厚板補強板を構成する
ことを特徴とする水平力分散支承装置。
A horizontal force distribution support device according to claim 2,
The laminated rubber body comprises a lower partial laminated rubber body containing a plurality of layers of reinforcing plates, and an upper partial laminated rubber body containing a plurality of layers of reinforcing plates,
The upper partial laminated rubber body is
The upper thick plate reinforcing plate, and a reinforcing plate according to a lower layer of the plurality of layers of reinforcing plates, the lower flange plate being thicker and larger than the reinforcing plate according to the other intermediate layer, Have
The lower partial laminated rubber body is
The lower thick plate reinforcing plate, and a reinforcing plate according to the upper layer of the plurality of layers of reinforcing plates, the upper flange plate being thicker and larger than the reinforcing plate according to the other intermediate layer Have
The intermediate force plate reinforcing plate that is exposed in the form of a flange from the side surface of the laminated rubber body by joining the lower flange plate and the upper flange plate with a bolt to constitute a horizontal force distribution bearing device. .
請求項2又は3に記載した水平力分散支承装置であって、
前記中間厚板補強板には、露出する平面部に切欠又はフランジ孔を設け、
前記ストッパブロックは、前記切欠又は前記フランジ孔に対応する位置に嵌合可能に設けられているものである
ことを特徴とする水平力分散支承装置。
A horizontal force distribution support device according to claim 2 or 3,
The intermediate thick plate reinforcing plate is provided with a notch or a flange hole in the exposed flat portion,
The stopper block is provided so as to be able to be fitted at a position corresponding to the notch or the flange hole.
請求項1〜4のいずれか1つに記載した水平力分散支承装置であって、
前記ストッパブロックは、前記中間厚板補強板の前後左右に対向する位置に設けられてい
ことを特徴とする水平力分散支承装置。
A horizontal force distribution support device according to any one of claims 1 to 4,
The stopper block has a horizontal force-distributing bearing and wherein the Ru Tei provided at a position opposed to the front, rear, right and left of the middle plank reinforcing plate.
請求項1に記載した水平力分散支承装置であって、
前記積層ゴム体には、前記積層ゴム体の下面又は上面から前記中間厚板補強板に至るように内部孔を設け、
前記ストッパブロックは、前記内部孔に対応する位置に嵌合可能に設けられているものである
ことを特徴とする水平力分散支承装置。
A horizontal force distribution support device according to claim 1,
In the laminated rubber body , an internal hole is provided so as to reach the intermediate thick plate reinforcing plate from the lower surface or the upper surface of the laminated rubber body,
The stopper block is provided so as to be fitted at a position corresponding to the inner hole.
請求項1〜6のいずれか1つに記載した水平力分散支承装置であって、
前記中間厚板補強板と前記ストッパブロックとの間に所定の隙間を設けてい
ことを特徴とする水平力分散支承装置。
A horizontal force distribution support device according to any one of claims 1 to 6,
Horizontal force-distributing bearing and wherein the Ru Tei provided a predetermined gap between the stopper block and the intermediate thick reinforcing plate.
JP2002163804A 2002-06-05 2002-06-05 Horizontal force distribution bearing device Expired - Lifetime JP3848214B2 (en)

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KR100939183B1 (en) 2007-12-03 2010-01-28 (주) 국제이엔씨 Improve elastomeric bearing with high-stiffness in horizontal direction under earthquake
CN102852089B (en) * 2012-09-28 2014-05-28 衡水橡胶股份有限公司 Pot bearing with horizontal compensation type force sensor
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CN106245783A (en) * 2016-10-25 2016-12-21 辽宁工程技术大学 A kind of compounded shock isolating pedestal that three-dimensional energy-consumption is provided
CN106638977A (en) * 2017-02-16 2017-05-10 许昌义 Vertical-direction and horizontal-direction combined shock insulation supporting seat
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