JP2017044009A - Foundation structure for seismic isolation building - Google Patents

Foundation structure for seismic isolation building Download PDF

Info

Publication number
JP2017044009A
JP2017044009A JP2015168505A JP2015168505A JP2017044009A JP 2017044009 A JP2017044009 A JP 2017044009A JP 2015168505 A JP2015168505 A JP 2015168505A JP 2015168505 A JP2015168505 A JP 2015168505A JP 2017044009 A JP2017044009 A JP 2017044009A
Authority
JP
Japan
Prior art keywords
base
steel
reinforced concrete
composite beam
seismic isolation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2015168505A
Other languages
Japanese (ja)
Other versions
JP6816941B2 (en
Inventor
ラヴィ シング
Singh Ravi
ラヴィ シング
仁 佐々木
Hitoshi Sasaki
仁 佐々木
増田　圭司
Keiji Masuda
圭司 増田
毅洋 東
Takehiro Higashi
毅洋 東
孝 浅野
Takashi Asano
孝 浅野
幸博 佐藤
Yukihiro Sato
幸博 佐藤
英治 森山
Eiji Moriyama
英治 森山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujita Corp
Original Assignee
Fujita Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujita Corp filed Critical Fujita Corp
Priority to JP2015168505A priority Critical patent/JP6816941B2/en
Publication of JP2017044009A publication Critical patent/JP2017044009A/en
Application granted granted Critical
Publication of JP6816941B2 publication Critical patent/JP6816941B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Foundations (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a foundation structure for a seismic isolation building which is excellent in economic and construction efficiency and has an advantage in efficiently maintaining a seismic isolation device.SOLUTION: A foundation structure 18 of a seismic isolation building 10 comprises: a plurality of base sections 20; and a plurality of foundation beams 24 which connect lateral faces of the base sections 20. Each of the plurality of foundation beams 24 is a composite beam 26. The composite beam 26 may have a steel construction 2604 at a central section thereof and steel-reinforced concrete constructions 2602 on both sides of the central section. Or, the composite beam 26 may have the steel construction 2604 at the central section thereof, the steel-reinforced concrete constructions 2602 on both sides of the central section and reinforced concrete constructions 2606 continuous with the steel-reinforced concrete constructions 2602.SELECTED DRAWING: Figure 1

Description

本発明は、免震建物に関し、さらに詳しくは、基礎梁として複合梁を用いた免震建物の基礎構造に関する。   The present invention relates to a base-isolated building, and more particularly to a base structure of a base-isolated building using a composite beam as a base beam.

特許文献１には、免震建物として、上部構造体の基礎構造が、互いに切り離された複数の基部（連結部）と、それら基部を連結する複数の基礎梁とで構成され、複数の基部が免震装置を介して下部構造体上で免震支持されたものが知られている。
このような免震建物の基礎構造においては、基礎梁を鉄筋コンクリート造（ＲＣ造）の梁とすることが一般的である。このため、建物のスパンの長さが鉄筋コンクリート造梁で可能なスパン長となってしまう。しかしながら、物流施設や病院などのような建物でスパンが長く、鉄筋コンクリート造梁の適用が不可能な場合、梁にプレストレスを導入するか、鉄骨鉄筋コンクリート造（ＳＲＣ造）の梁とすることが多い。 In Patent Document 1, as a base-isolated building, the basic structure of the upper structure is composed of a plurality of base portions (connecting portions) separated from each other and a plurality of base beams connecting the base portions, and the plurality of base portions are It is known that seismic isolation is supported on the lower structure via a seismic isolation device.
In such a base structure of a base-isolated building, the foundation beam is generally a reinforced concrete (RC) beam. For this reason, the span length of a building will be a span length possible with a reinforced concrete beam. However, if the span is long in buildings such as logistics facilities and hospitals and it is impossible to apply reinforced concrete beams, pre-stress is introduced to the beams or steel reinforced concrete (SRC) beams are often used. .

特開２００８−２８５９５２号公報JP 2008-285952 A

しかしながら、基礎梁を鉄筋コンクリート造梁や鉄骨鉄筋コンクリート造梁とした場合、鉄筋工や型枠大工などの労務が不足している中で、労務の手配が難しく、施工が困難である。特に、少人数の労務で施工した場合、基礎工事の工期が長くなり、全体工程が従来よりも長くなる。
また、鉄筋コンクリート造梁や鉄骨鉄筋コンクリート造梁の場合は、型枠材や支保工などの仮設材が増えてしまい、免震ピットからの解体・搬出は手間がかかる。
また、建物のスパンが大きい場合に、プレストレスを導入した梁を用いることがあるが、プレストレスを導入するには専門業者を要し、専門業者によるプレストレスの導入は躯体工事のコストアップになる。
また、従来の鉄筋コンクリート造や鉄骨鉄筋コンクリート造からなる基礎梁の場合、免震ピットを大きく確保する上で不利となり、免震装置のメンテナンスを効率良く行なう上で不利となる。
また、設備配管を収めるため、免震ピットの根切り深さが深くなり、残土が増えて躯体工事のコストの低減化を図る上で不利となる問題もある。
また、建物のスパンが大きい場合には、基礎梁を鉄骨造とすることも考えられるが、鉄骨造の梁は剛性が弱く、床振動に起因し、居住性が低下するという問題がある。
上記の課題により、免震建物を構築中の各作業所において施工性が悪くなり、作業の効率を低下させることになる。 However, when the foundation beam is a reinforced concrete beam or a steel-framed reinforced concrete beam, it is difficult to arrange labor due to lack of labor such as rebar work or formwork carpenter. In particular, when construction is performed with a small number of workers, the construction period of the foundation work becomes longer, and the entire process becomes longer than before.
In the case of reinforced concrete beams and steel-framed reinforced concrete beams, temporary materials such as formwork materials and supporting works increase, and it takes time to dismantle and carry out the seismic isolation pit.
In addition, prestressed beams may be used when the span of the building is large, but a special contractor is required to introduce prestress. Become.
Further, in the case of a foundation beam made of a conventional reinforced concrete structure or a steel reinforced concrete structure, it is disadvantageous for securing a large seismic isolation pit, and disadvantageous for efficient maintenance of the seismic isolation device.
In addition, because the equipment piping is accommodated, there is a problem in that the seismic isolation pit has a deep root cutting depth, and the remaining soil increases, which is disadvantageous in reducing the cost of the frame construction.
In addition, when the span of a building is large, it is conceivable that the foundation beam is made of steel. However, the steel beam has a problem that the rigidity is weak and the habitability is lowered due to floor vibration.
Due to the above-mentioned problems, workability deteriorates at each work site that is constructing a base-isolated building, and the work efficiency is reduced.

本発明は、上記のような課題を解決するためになされたもので、施工性及び経済性に優れ免震装置のメンテナンスを効率良く行なう上で有利な免震建物の基礎構造を提供することを目的とする。   The present invention has been made to solve the above-described problems, and provides a foundation structure of a seismic isolation building that is excellent in workability and economical efficiency and that is advantageous in efficiently maintaining a seismic isolation device. Objective.

上記目的を達成するために、本発明は、上部構造体の基礎構造が、互いに切り離された複数の基部と、それら基部を連結する複数の基礎梁とを含んで構成され、前記複数の基部は、免震装置を介して下部構造体上で免震支持された免震建物の基礎構造であって、前記複数の基礎梁は、その長手方向の中央部が鉄骨造であり、前記鉄骨造の両端に続く箇所が鉄骨鉄筋コンクリート造である複合梁を含んで構成されていることを特徴とする。   To achieve the above object, according to the present invention, the basic structure of the upper structure is configured to include a plurality of base portions separated from each other and a plurality of base beams connecting the base portions, A base structure of a base-isolated building that is supported by base isolation on a lower structure via a base isolation device, wherein the plurality of foundation beams have a steel frame structure at the center in the longitudinal direction thereof. The part which continues to both ends is comprised including the composite beam which is a steel reinforced concrete structure, It is characterized by the above-mentioned.

本発明の免震建物の基礎構造によれば、基礎梁を複合梁とすることにより、鉄筋コンクリート造梁や鉄骨鉄筋コンクリート造梁に比べて労務不足の課題が緩和できる。
鉄筋工や型枠大工による作業は複合梁の端部の鉄骨鉄筋コンクリート造の部分のみなので、少人数の労務でも施工が可能となる。また、複合梁の中央部分が鉄骨造のため、スピーディーな建方で工期短縮ができる。
鉄筋コンクリート造梁や鉄骨鉄筋コンクリート造梁に比べて型枠材や仮設材が削減できるので、免震ピットからの解体・搬出の手間が省ける。
複合梁は建物のスパンが大きい部分に適用可能なため、プレストレスの手間が省けるので、躯体工事のコストが低減できる。
複合梁の中央部分が鉄骨のため、免震ピットを大きく確保する上で有利となり、免震装置のメンテナンスを効率良く行なう上で有利となる。
また、免震ピット内での設備配管の収まりも容易になり、免震ピットの根切り深さを抑えることができることから、掘削量を削減して躯体工事のコストの低減化を図る上で有利となる。
複合梁は端部が鉄骨鉄筋コンクリート造のため、梁の剛性が高く、床振動を押さえ、居住性が改善される。
複合梁を適用することで施工性が改善されるので、作業所においての省力化が図れる。 According to the foundation structure of the base-isolated building of the present invention, the problem of labor shortage can be alleviated as compared with the reinforced concrete beam or the steel reinforced concrete beam by using the foundation beam as the composite beam.
Since the work by the rebar and formwork carpenter is only the steel reinforced concrete part at the end of the composite beam, the work can be done even with a small number of labor. In addition, because the central part of the composite beam is steel, the construction period can be shortened with a speedy construction method.
Compared to reinforced concrete beams and steel-framed reinforced concrete beams, formwork and temporary materials can be reduced, eliminating the need for dismantling and unloading from the seismic isolation pit.
Since composite beams can be applied to the part where the span of the building is large, the labor of prestressing can be saved, so that the cost of frame construction can be reduced.
Since the central part of the composite beam is a steel frame, it is advantageous for securing a large seismic isolation pit, and it is advantageous for efficient maintenance of the seismic isolation device.
In addition, it is easy to fit the equipment piping in the seismic isolation pit, and it is possible to reduce the root cutting depth of the seismic isolation pit, which is advantageous for reducing the amount of excavation and reducing the cost of the frame work. It becomes.
The end of the composite beam is steel-framed reinforced concrete, so the beam has high rigidity, suppresses floor vibration, and improves comfortability.
Since the workability is improved by applying the composite beam, labor can be saved at the work place.

実施の形態に係る免震建物の縦断面図である。It is a longitudinal cross-sectional view of the seismic isolation building which concerns on embodiment. 図１のＡＡ線断面図である。It is AA sectional view taken on the line of FIG. 図１のＢＢ線断面図である。It is BB sectional drawing of FIG. 基礎梁の構成を示す断面図である。It is sectional drawing which shows the structure of a foundation beam. 基礎梁の変形例を示す断面図である。It is sectional drawing which shows the modification of a foundation beam. 複数種類の梁を混合して設けた上部構造の断面図である。It is sectional drawing of the upper structure which mixed and provided the multiple types of beam. 柱を連結する複合梁の断面図である。It is sectional drawing of the composite beam which connects a column. 柱を連結する複合梁の変形例を示す断面図である。It is sectional drawing which shows the modification of the composite beam which connects a column. ブレースおよび耐力壁が設けられた免震建物の正面図である。It is a front view of a seismic isolation building provided with braces and bearing walls. （Ａ）〜（Ｃ）は別実施例の説明図である。(A)-(C) are explanatory drawings of another Example. 鉄筋コンクリート造の基礎梁を示す図である。It is a figure which shows the foundation beam of a reinforced concrete structure. 鉄骨鉄筋コンクリート造の基礎梁を示す図である。It is a figure which shows the foundation beam of a steel frame reinforced concrete structure. 複数種類の基礎梁が用いられた免震建物の縦断面図である。It is a longitudinal cross-sectional view of a base-isolated building using a plurality of types of foundation beams. 図１３のＡＡ線断面図である。It is AA sectional view taken on the line of FIG.

次に、本発明の実施の形態について図面を参照して説明する。
図１、図２に示すように、免震建物１０は、上部構造体１２が免震装置１６を介して下部構造体１４上で免震支持されたものである。
下部構造体１４は、地盤に設けられた不図示の基礎を含み、この基礎上に設けられ水平面に沿って延在する底盤１５０２と、底盤１５０２の外周に沿って起立する不図示の周壁（土留め壁）とを備えている。
そして、底盤１５０２上で周壁（土留め壁）の内側が免震ピット１５となっている。
図４に示すように、免震装置１６は、互いに間隔をおいて配置された複数の免震用積層ゴム１６０２を含んで構成されている。本実施の形態では、免震用積層ゴム１６０２は、平面視、縦横に所定の間隔をおいて格子状に配置されている。
免震用積層ゴム１６０２は、多数のゴムシートと多数の鋼板とが交互に重ね合わせて接合された積層体を含んで構成されている。免震用積層ゴム１６０２は、積層体の内部に、振動のエネルギを吸収する鉛の柱が挿入されているものや挿入されていないものなど従来公知の様々な構造が採用可能である。 Next, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the seismic isolation building 10 is a structure in which an upper structure 12 is seismically isolated on a lower structure 14 via a seismic isolation device 16.
The lower structure 14 includes a foundation (not shown) provided on the ground, a bottom board 1502 provided on the foundation and extending along a horizontal plane, and a peripheral wall (soil) (not shown) standing along the outer periphery of the bottom board 1502. Retaining wall).
And on the bottom board 1502, the inner side of the peripheral wall (earth retaining wall) is a seismic isolation pit 15.
As shown in FIG. 4, the seismic isolation device 16 includes a plurality of seismic isolation laminated rubbers 1602 that are spaced apart from each other. In the present embodiment, the seismic isolation laminated rubber 1602 is arranged in a lattice form with a predetermined interval in the vertical and horizontal directions in plan view.
The seismic isolation laminated rubber 1602 includes a laminated body in which a large number of rubber sheets and a large number of steel plates are alternately overlapped and joined. As the seismic isolation laminated rubber 1602, various known structures such as those in which a lead pillar that absorbs vibration energy is inserted or not inserted in the laminated body can be adopted.

積層体の下側のフランジプレート１６０４Ａは、底盤１５０２にボルトで取着されている。
積層体の上側のフランジプレート１６０４Ｂは、基礎構造１８の基部２０にボルトで取着されている。
基部２０は、柱２２の断面形状よりも大きな断面形状を呈し、鉄筋コンクリート製であり、本実施の形態では、断面が矩形を呈している。 The lower flange plate 1604A of the laminated body is attached to the bottom plate 1502 with bolts.
The upper flange plate 1604B of the laminate is attached to the base 20 of the foundation structure 18 with bolts.
The base 20 has a larger cross-sectional shape than the cross-sectional shape of the column 22 and is made of reinforced concrete. In the present embodiment, the cross-section has a rectangular shape.

上部構造体１２は、図１〜図３に示すように、基礎構造１８と、複数の柱２２と、複数の梁２８とを含んで構成されている。
基礎構造１８は、複数の基部２０と、それら基部２０の側面間を連結する複数の基礎梁２４とを含んで構成されている。
図４に示すように、複数の基礎梁２４は、両端が鉄骨鉄筋コンクリート造２６０２であり中央部が鉄骨造２６０４である複合梁２６で構成されている。
すなわち、複合梁２６の両端の鉄骨鉄筋コンクリート造２６０２は、基部２０の側面に接合されている。
この場合、複合梁２６は、図５（Ａ）に示すように、中央部が鉄骨造２６０４であり、中央部の両側が鉄骨鉄筋コンクリート造２６０２であり、両端が鉄筋コンクリート造２６０６であってもよく、あるいは図５（Ｂ）に示すように、中央部が鉄骨造２６０４であり、中央部の両側が鉄骨鉄筋コンクリート造２６０２であってもよい。
図５（Ａ）、（Ｂ）の何れの場合も、鉄骨造２６０４の両側の鉄骨鉄筋コンクリート造２６０２または鉄骨造２６０４の両側の鉄骨鉄筋コンクリート造２６０２および鉄筋コンクリート造２６０６は、現場打ちコンクリート造またはプレキャストコンクリート造により構成することができる。プレキャストコンクリート造とした場合、フルプレキャストあるいはハーフプレキャストの何れを用いても良い。 As shown in FIGS. 1 to 3, the upper structure 12 includes a foundation structure 18, a plurality of pillars 22, and a plurality of beams 28.
The foundation structure 18 includes a plurality of base portions 20 and a plurality of base beams 24 that connect the side surfaces of the base portions 20.
As shown in FIG. 4, the plurality of foundation beams 24 are composed of composite beams 26 whose both ends are steel reinforced concrete structures 2602 and whose central portions are steel structures 2604.
That is, the steel reinforced concrete structures 2602 at both ends of the composite beam 26 are joined to the side surfaces of the base 20.
In this case, as shown in FIG. 5A, the composite beam 26 may be a steel structure 2604 at the center, steel reinforced concrete structures 2602 on both sides of the center, and reinforced concrete structures 2606 at both ends. Alternatively, as shown in FIG. 5B, the central portion may be a steel frame structure 2604, and both sides of the central portion may be a steel frame reinforced concrete structure 2602.
5A and 5B, the steel reinforced concrete structure 2602 on both sides of the steel structure 2604 or the steel reinforced concrete structure 2602 and the reinforced concrete structure 2606 on both sides of the steel structure 2604 are either cast-in-place concrete structure or precast concrete structure. Can be configured. When a precast concrete structure is used, either full precast or half precast may be used.

図１、図２に示すように、複数の柱２２は各基部２０から立設されている。
複数の梁２８は、複数の柱２２を各階毎に接続している。
本実施の形態では、柱２２は鉄筋コンクリート造柱２２０２であり、梁２８は鉄骨造梁２８０２である。
なお、上部構造体１２は、上記の構造に限定されず、図６に平面図で示すように、必要に応じて、鉄骨造梁２８０２、鉄骨鉄筋コンクリート造梁２８０４、鉄筋コンクリート造梁２８０６を混合して用いるようにしてもよく、図７に示す両端が鉄骨鉄筋コンクリート造３００２であり中央部が鉄骨造３００４である複合梁３０、あるいは、図８に示す、中央部が鉄骨造３００４であり、中央部の両側が鉄骨鉄筋コンクリート造３００２であり、両端が鉄筋コンクリート造３００６である複合梁３０を用いても良い。
また、柱２２も必要に応じて鉄骨造柱、鉄骨鉄筋コンクリート造柱、鉄筋コンクリート造柱を混合して用いるようにしてもよい。
また、柱２２は、現場打ちコンクリートで構築してもよいし、プレキャストコンクリート柱で構築してもよい。柱２２をプレキャストコンクリート柱で構築した場合、フルプレキャストを用いてもよく、あるいは、柱２２を中空断面形状としてもよい。
また、階毎に複数の梁２８の構成、複数の柱２２の構成がそれぞれ異なっていてもよい。
さらに、図９に示すように、必要に応じて、上下で隣り合う梁２８の間に、一対の型鋼等からなる補強材を互いに略Ｖ字形をなすように組んだ複数の耐震や制振機能のあるブレース３２を掛け渡すようにしてもよい。
また、上部構造体１２は、図１〜図３に示すような純ラーメン構造の他、必要に応じて、図９に示すように、柱２２および梁２８で囲まれた空間に耐力壁３３を設けても良い。 As shown in FIGS. 1 and 2, the plurality of pillars 22 are erected from each base 20.
The plurality of beams 28 connect the plurality of pillars 22 to each floor.
In the present embodiment, the column 22 is a reinforced concrete column 2202 and the beam 28 is a steel beam 2802.
The upper structure 12 is not limited to the above structure, and as shown in a plan view in FIG. 6, a steel beam 2802, a steel reinforced concrete beam 2804, and a reinforced concrete beam 2806 are mixed as necessary. 7 may be used, or the composite beam 30 in which both ends shown in FIG. 7 are steel reinforced concrete structures 3002 and the central part is steel structure 3004, or the central part is steel structure 3004 shown in FIG. The composite beam 30 may be used in which both sides are steel-framed reinforced concrete structures 3002 and both ends are reinforced concrete structures 3006.
Further, the column 22 may be used by mixing steel-framed columns, steel-framed reinforced concrete columns, and reinforced concrete columns as necessary.
Moreover, the pillar 22 may be constructed with a cast-in-place concrete or a precast concrete pillar. When the column 22 is constructed of a precast concrete column, full precast may be used, or the column 22 may have a hollow cross-sectional shape.
Moreover, the structure of the some beam 28 and the structure of the some pillar 22 may differ for every floor.
Furthermore, as shown in FIG. 9, a plurality of seismic and damping functions in which reinforcing members made of a pair of steel plates or the like are assembled so as to form a substantially V shape between the beams 28 adjacent to each other as necessary, as shown in FIG. You may make it span the brace 32 with.
In addition to the pure ramen structure as shown in FIGS. 1 to 3, the upper structure 12 has a load-bearing wall 33 in the space surrounded by the pillars 22 and the beams 28 as shown in FIG. 9 as necessary. It may be provided.

また、図１０（Ａ）に示すように、複合梁２６が基部２０に連結される部分の梁幅Ｗ１を、柱２２の幅Ｗ２よりも大きく形成すると、複合梁２６が基部２０に連結される部分の梁成を小さくでき、免震ピット１５を大きく確保する上で有利となり、免震装置１６のメンテナンスを効率良く行なう上で有利となる。
すなわち、複合梁２６が基部２０に連結される部分の梁幅Ｗ１を、柱２２の幅Ｗ２よりも大きく形成すると、複合梁２６が基部２０に連結される部分、例えば、図１０（Ｂ）に示すように鉄骨鉄筋コンクリート造２６０２および鉄筋コンクリート造２６０６の梁成Ｈや図１０（Ｃ）に示すように鉄骨鉄筋コンクリート造２６０２の梁成Ｈを小さくでき、免震ピット１５を大きく確保する上で有利となり、免震装置１６のメンテナンスを効率良く行なう上で有利となる。 10A, when the beam width W1 of the portion where the composite beam 26 is connected to the base portion 20 is formed larger than the width W2 of the column 22, the composite beam 26 is connected to the base portion 20. This makes it possible to reduce the beam formation of the portion, which is advantageous in securing a large seismic isolation pit 15 and advantageous in performing maintenance of the seismic isolation device 16 efficiently.
That is, if the beam width W1 of the portion where the composite beam 26 is connected to the base portion 20 is formed larger than the width W2 of the column 22, the portion where the composite beam 26 is connected to the base portion 20, for example, FIG. As shown in FIG. 10C, the beam formation H of the steel reinforced concrete structure 2602 and the steel reinforced concrete structure 2606 can be reduced, which is advantageous in securing a large seismic isolation pit 15. This is advantageous for efficient maintenance of the seismic isolation device 16.

本実施の形態によれば以下の効果が奏される。
（１）基礎梁２４を両端が鉄骨鉄筋コンクリート造２６０２または鉄筋コンクリート造２６０６であり中央部が鉄骨造２６０４である複合梁２６で構成したので、基礎梁２４を鉄筋コンクリート造梁や鉄骨鉄筋コンクリート造梁で構成する場合に比べて労務不足の課題が緩和できる。
すなわち、複合梁２６を施工するにあたっては、鉄筋工や型枠大工による作業が複合梁２６の両端の鉄骨鉄筋コンクリート造２６０２または鉄筋コンクリート造２６０６の部分のみなので、少人数の労務でも施工が可能となる。また、複合梁２６の中央部分が鉄骨造２６０４のため、スピーディーな建方で工期短縮ができる。
（２）基礎梁２４を鉄筋コンクリート造梁や鉄骨鉄筋コンクリート造梁で構成する場合に比べて、型枠材や仮設材が複合梁２６の両端部分のみで足りることから、型枠材や仮設材を削減できるので、それら型枠材や仮設材を解体し免震ピット１５から搬出する際の手間が省ける。
（３）複合梁２６は建物のスパンが大きい部分に適用可能なため、プレストレスの手間が省けるので、躯体工事のコストが低減できる。
（４）複合梁２６の中央部分が鉄骨のため、免震ピット１５を大きく確保する上で有利となり、免震装置１６のメンテナンスを効率良く行なう上で有利となる。
また、免震ピット１５内での設備配管の収まりも容易になることから、免震ピット１５の根切り深さを抑える上で有利となり、掘削量を削減して躯体工事のコストの低減化を図る上で有利となる。
（５）複合梁２６は両端が鉄骨鉄筋コンクリート造２６０２または鉄筋コンクリート造２６０６のため、梁の剛性が高く、床振動を押さえ、居住性が改善される。
（６）複合梁２６を適用することで施工性が改善されるので、作業所においての省力化が図れる。
（７）上述の効果から施工性及び経済性に優れた免震建物１０を提供する上で有利となる。 According to the present embodiment, the following effects are produced.
(1) Since the foundation beam 24 is composed of the composite beam 26 whose both ends are the steel reinforced concrete structure 2602 or the reinforced concrete structure 2606 and the central part is the steel structure 2604, the foundation beam 24 is composed of a reinforced concrete beam or a steel reinforced concrete beam. Compared to the case, labor shortage can be alleviated.
That is, when constructing the composite beam 26, the work by the rebar or formwork is only performed on the steel reinforced concrete structure 2602 or the reinforced concrete structure 2606 at both ends of the composite beam 26, so that the construction can be performed even with a small number of labors. In addition, since the central portion of the composite beam 26 is a steel structure 2604, the construction period can be shortened with a speedy construction method.
(2) Compared to the case where the foundation beam 24 is composed of a reinforced concrete beam or a steel reinforced concrete beam, the formwork material and the temporary material are sufficient only at both ends of the composite beam 26, so the formwork material and the temporary material are reduced. As a result, it is possible to save time and labor when dismantling these mold materials and temporary materials and carrying them out from the seismic isolation pit 15.
(3) Since the composite beam 26 can be applied to a part where the span of the building is large, the labor of pre-stress can be saved, so that the cost of the frame construction can be reduced.
(4) Since the central portion of the composite beam 26 is a steel frame, it is advantageous for securing a large seismic isolation pit 15 and is advantageous for efficiently maintaining the seismic isolation device 16.
In addition, it is easy to fit the equipment piping in the seismic isolation pit 15, which is advantageous in suppressing the depth of the base isolation of the seismic isolation pit 15, reducing the excavation amount and reducing the cost of the frame work. It is advantageous in planning.
(5) Since both ends of the composite beam 26 are steel-framed reinforced concrete structures 2602 or reinforced concrete structures 2606, the rigidity of the beams is high, floor vibration is suppressed, and comfort is improved.
(6) Since the workability is improved by applying the composite beam 26, it is possible to save labor in the work place.
(7) From the above-mentioned effects, it is advantageous in providing the seismic isolation building 10 excellent in workability and economy.

なお、本実施の形態では、複数の基礎梁２４を全て複合梁２６で構成する場合について説明したが、必要に応じて複数の基礎梁２４の一部を図１１に示す鉄筋コンクリート造梁３４、図１２に示す鉄骨鉄筋コンクリート造梁３６、プレストレス梁の何れか１種類の梁で構成し、あるいは、２種類以上の梁を組み合わせて構成してもよいことは無論である。
すなわち、スパンが大きい箇所や設備配管が配置される箇所を複合梁２６とし、さらにスパンが大きい箇所を鉄骨造梁３４あるいは鉄骨鉄筋コンクリート造梁３６あるいはプレストレス梁とし、スパンが小さい箇所を鉄筋コンクリート造梁としてもよい。
図１３、図１４は、必要に応じて複数の基礎梁２４の一部を、必要に応じて鉄筋コンクリート造梁３４、鉄骨鉄筋コンクリート造梁３６に置き代えて用いている。
また、本実施の形態では、下部構造体１４が、建物が構築される地盤であり、上部構造体１２が建物である場合について説明したが、上部構造体１２と下部構造体１４とが共に建物である場合にも本発明は同様に適用可能である。 In the present embodiment, a case has been described in which a plurality of foundation beams 24 are all composed of composite beams 26. However, as necessary, a part of the plurality of foundation beams 24 may be a reinforced concrete beam 34 shown in FIG. Of course, any one of the steel-frame reinforced concrete beam 36 and the prestressed beam shown in FIG. 12 may be used, or two or more types of beams may be combined.
That is, a portion having a large span or a place where equipment piping is arranged is a composite beam 26, a portion having a large span is a steel beam 34, a steel reinforced concrete beam 36, or a prestressed beam, and a portion having a small span is a reinforced concrete beam. It is good.
In FIGS. 13 and 14, a part of the plurality of foundation beams 24 is replaced with a reinforced concrete beam 34 and a steel reinforced concrete beam 36 as necessary.
In the present embodiment, the case where the lower structure 14 is a ground on which a building is constructed and the upper structure 12 is a building has been described. However, the upper structure 12 and the lower structure 14 are both buildings. In this case, the present invention can be similarly applied.

１０ 免震建物
１２ 上部構造体
１４ 下部構造体
１５ 免震ピット
１６ 免震装置
１８ 基礎
２０ 基部
２２ 柱
２４ 基礎梁
２６ 複合梁
２６０２ 鉄骨鉄筋コンクリート造
２６０４ 鉄骨造
２６０６ 鉄筋コンクリート造
２８ 梁
２８０２ 鉄骨造梁
２８０４ 鉄骨鉄筋コンクリート造梁
２８０６ 鉄筋コンクリート造梁
３０ 複合梁
３００２ 鉄骨鉄筋コンクリート造
３００４ 鉄骨造
３００６ 鉄筋コンクリート造
３２ ブレース
３３ 耐力壁
３４ 鉄骨造梁
３６ 鉄骨鉄筋コンクリート造梁 10 base-isolated building 12 upper structure 14 lower structure 15 base-isolated pit 16 base-isolated device 18 base 20 base 22 pillar 24 foundation beam 26 composite beam 2602 steel reinforced concrete 2604 steel 2606 reinforced concrete 28 beam 2802 steel beam 2804 steel Reinforced concrete beam 2806 Reinforced concrete beam 30 Composite beam 3002 Steel reinforced concrete frame 3004 Steel frame 3006 Reinforced concrete frame 32 Brace 33 Bearing wall 34 Steel beam 36 Steel reinforced concrete beam

Claims (7)

上部構造体の基礎構造が、互いに切り離された複数の基部と、それら基部を連結する複数の基礎梁とを含んで構成され、
前記複数の基部は、免震装置を介して下部構造体上で免震支持された免震建物の基礎構造であって、
前記複数の基礎梁は、その長手方向の中央部が鉄骨造であり、前記鉄骨造の両端に続く箇所が鉄骨鉄筋コンクリート造である複合梁を含んで構成されている、
ことを特徴とする免震建物の基礎構造。 The base structure of the upper structure includes a plurality of base portions separated from each other and a plurality of base beams connecting the base portions,
The plurality of bases are base structures of a base-isolated building that is supported by base isolation on a lower structure via a base isolation device,
The plurality of foundation beams are configured to include a composite beam in which a central portion in a longitudinal direction thereof is a steel structure, and a portion continuing from both ends of the steel structure is a steel reinforced concrete structure,
The basic structure of a base-isolated building. 前記複合梁は、前記鉄骨造と反対に位置する前記鉄骨鉄筋コンクリート造の端部に続き前記基部に連結される箇所が鉄筋コンクリート造である、
ことを特徴とする請求項１記載の免震建物の基礎構造。 The composite beam has a reinforced concrete structure where the end connected to the steel reinforced concrete structure located opposite to the steel structure is connected to the base.
The base structure of the base-isolated building according to claim 1. 前記上部構造体は、前記複数の基部にそれぞれ設けられた複数の柱を備え、
前記複合梁が前記基部に連結される部分の梁幅は、前記柱の幅よりも大きく形成されている、
ことを特徴とする請求項１または２記載の免震建物の基礎構造。 The upper structure includes a plurality of columns provided on the plurality of bases,
The beam width of the portion where the composite beam is connected to the base is formed larger than the width of the column.
The base structure of a base-isolated building according to claim 1 or 2. 前記複合梁の前記鉄骨鉄筋コンクリート造の部分は、現場打ちコンクリート造またはプレキャストコンクリート造である、
ことを特徴とする請求項１記載の免震建物の基礎構造。 The steel-framed reinforced concrete part of the composite beam is a cast-in-place concrete structure or a precast concrete structure,
The base structure of the base-isolated building according to claim 1. 前記複合梁の前記鉄骨鉄筋コンクリート造の部分および鉄筋コンクリート造の部分は、現場打ちコンクリート造またはプレキャストコンクリート造である、
ことを特徴とする請求項２記載の免震建物の基礎構造。 The steel-framed reinforced concrete part and the reinforced concrete part of the composite beam are in-situ concrete or precast concrete,
The base structure of a base-isolated building according to claim 2. 前記複数の基礎梁は全て、その長手方向の中央部が鉄骨造であり、前記鉄骨造の両端に続く箇所が鉄骨鉄筋コンクリート造である複合梁で構成されている、
ことを特徴とする請求項１〜５の何れか１項記載の免震建物の基礎構造。 Each of the plurality of foundation beams is composed of a composite beam in which the central portion in the longitudinal direction is a steel structure, and the places following both ends of the steel structure are a steel reinforced concrete structure,
The base structure of a base-isolated building according to any one of claims 1 to 5. 前記複数の基礎梁は、前記複合梁に加えて、鉄筋コンクリート造梁、鉄骨鉄筋コンクリート造梁、プレストレス梁の少なくとも１つの梁を含む、
ことを特徴とする請求項１〜５の何れか１項記載の免震建物の基礎構造。 The plurality of foundation beams include at least one of a reinforced concrete beam, a steel reinforced concrete beam, and a prestressed beam in addition to the composite beam.
The base structure of a base-isolated building according to any one of claims 1 to 5.
JP2015168505A 2015-08-28 2015-08-28 Foundation structure of seismic isolated building Active JP6816941B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015168505A JP6816941B2 (en) 2015-08-28 2015-08-28 Foundation structure of seismic isolated building

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015168505A JP6816941B2 (en) 2015-08-28 2015-08-28 Foundation structure of seismic isolated building

Publications (2)

Publication Number Publication Date
JP2017044009A true JP2017044009A (en) 2017-03-02
JP6816941B2 JP6816941B2 (en) 2021-01-20

Family

ID=58209239

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2015168505A Active JP6816941B2 (en) 2015-08-28 2015-08-28 Foundation structure of seismic isolated building

Country Status (1)

Country Link
JP (1) JP6816941B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7362448B2 (en) 2019-11-25 2023-10-17 株式会社竹中工務店 Construction method of seismic isolation foundation beam

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7362448B2 (en) 2019-11-25 2023-10-17 株式会社竹中工務店 Construction method of seismic isolation foundation beam

Also Published As

Publication number Publication date
JP6816941B2 (en) 2021-01-20

Similar Documents

Publication Publication Date Title
JP6553442B2 (en) Reinforcement structure and reinforcement method for existing columns
JP2016216900A (en) Structure
JP2020037775A (en) Non-brace steel frame building construction method and column base unit
JP6339923B2 (en) How to build a building frame
JP6143068B2 (en) Underground structure of building
KR20190036248A (en) Seismic retrofit structure for building and seismic retrofit method using the same
JP6816941B2 (en) Foundation structure of seismic isolated building
JP2007277856A (en) Aseismatic reinforcing structure of existing building
JP6228836B2 (en) Reverse winding method
JP5951375B2 (en) Steel tower reinforcement structure
JP6654428B2 (en) Building method using reverse construction method
KR20150032264A (en) Aseismic reinforcing structure
JP2014231702A (en) Column base fixing structure of steel frame column
KR101266215B1 (en) Improved seismic performance of Staggered wall system with central hall
JP2017218855A (en) Rebuilt-building including existing underground exterior wall
JP6712448B2 (en) Precast members for reinforced concrete beam-column joints
JP6684088B2 (en) Seismic retrofitting structure and method for existing buildings
JP6752006B2 (en) Fixed structure of building unit and unit building
JP2015161059A (en) building construction method
JP2012136932A (en) Seismic strengthening structure of existing builing
JP6300228B2 (en) Flat slab structure
KR20130051183A (en) Seismic resistant reinforcement structures and the reinforcing method using it
JP7265343B2 (en) steel building
WO2021149266A1 (en) Building construction method
JP7155488B2 (en) Structural Seismic Reinforcement Structure

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20180725

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20190529

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20190604

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20190724

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20191224

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20200220

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20200804

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20201023

C60 Trial request (containing other claim documents, opposition documents)

Free format text: JAPANESE INTERMEDIATE CODE: C60

Effective date: 20201023

A911 Transfer to examiner for re-examination before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A911

Effective date: 20201102

C21 Notice of transfer of a case for reconsideration by examiners before appeal proceedings

Free format text: JAPANESE INTERMEDIATE CODE: C21

Effective date: 20201110

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20201222

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20201224

R150 Certificate of patent or registration of utility model

Ref document number: 6816941

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250