JPH059944A - Fixing structure of pedestal - Google Patents

Fixing structure of pedestal

Info

Publication number
JPH059944A
JPH059944A JP18929991A JP18929991A JPH059944A JP H059944 A JPH059944 A JP H059944A JP 18929991 A JP18929991 A JP 18929991A JP 18929991 A JP18929991 A JP 18929991A JP H059944 A JPH059944 A JP H059944A
Authority
JP
Japan
Prior art keywords
steel
column
lower structure
base plate
prestress
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.)
Pending
Application number
JP18929991A
Other languages
Japanese (ja)
Inventor
Shuji Okuda
修司 奥田
Ichiro Kusama
伊知郎 草間
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.)
Shimizu Construction Co Ltd
Shimizu Corp
Original Assignee
Shimizu Construction Co Ltd
Shimizu 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 Shimizu Construction Co Ltd, Shimizu Corp filed Critical Shimizu Construction Co Ltd
Priority to JP18929991A priority Critical patent/JPH059944A/en
Publication of JPH059944A publication Critical patent/JPH059944A/en
Pending legal-status Critical Current

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  • Foundations (AREA)

Abstract

PURPOSE:To provide a large fixing force by a small number of PC steel materials to effectively transmit a moment from a steel framed column to a lower structure, and also enhance the lower structure to effectively prevent the cracking. CONSTITUTION:To fix the pedestal of a steel framed column 3 to a lower structure 1 made of reinforced concrete, the base plate 5 of the steel framed column is fastened to the lower structure by a PC steel material 4 embedded in the lower structure. By giving a tension to the PC steel material, a prestress is introduced to the lower structure.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、鉄骨柱の柱脚を鉄筋コ
ンクリート造の下部構造体に対して定着するための構造
に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing a column base of a steel frame column to a reinforced concrete substructure.

【0002】[0002]

【従来の技術】周知のように、鉄骨柱の柱脚を鉄筋コン
クリート造の下部構造体(柱や杭もしくは地下外壁等)
に対して定着する場合、鉄骨柱から下部構造体へのモー
メントの伝達が確実になされるように、下部構造体中に
埋設したアンカーボルトにより鉄骨柱のベースプレート
を下部構造体に対して強固に締結するか、もしくは、柱
脚部に根巻を施すことが従来一般的である。
2. Description of the Related Art As is well known, a column base of a steel column is used as a substructure of a reinforced concrete structure (columns, piles, underground outer walls, etc.).
When anchored against, the anchor plate embedded in the lower structure firmly fastens the base plate of the steel column to the lower structure so that the moment is surely transmitted from the steel column to the lower structure. In general, it is common practice to do this, or apply a neck wrap to the column base.

【0003】[0003]

【発明が解決しようとする課題】ところが、上記従来技
術では、鉄骨柱から下部構造体へと伝達すべきモーメン
トが大きい場合には、定着用のアンカーボルトの所要本
数が多大となったり、根巻きが大掛かりなものとならざ
るを得ず、このため、定着部において鉄筋とアンカーボ
ルトが輻輳して納まりや施工が困難となったり、定着部
にコンクリートが十分に充填できなくなるといった不具
合を生じることがあり、その改善策が要望されていた。
However, in the above-mentioned prior art, when the moment to be transmitted from the steel column to the lower structure is large, the required number of anchor bolts for fixing becomes large, or the root winding is involved. However, there is a possibility that the reinforcing bars and anchor bolts will be congested in the anchoring section, making it difficult to install and install, or that the anchoring section cannot be fully filled with concrete. Yes, there was a demand for improvement measures.

【0004】[0004]

【課題を解決するための手段】本発明は上記の事情に鑑
みてなされたもので、下部構造体に埋設したPC鋼材に
より鉄骨柱のベースプレートを下部構造体に対して締結
するとともに、そのPC鋼材に緊張力を付与することに
よって下部構造体にプレストレスを導入するようにした
ものである。
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a base plate of a steel frame pillar is fastened to a lower structure by a PC steel material embedded in the lower structure, and the PC steel material is used. Prestress is introduced into the lower structure by applying tension to the lower structure.

【0005】[0005]

【作用】本発明では、従来一般に採用されているアンカ
ーボルトに代えてPC鋼材を用い、そのPC鋼材により
鉄骨柱のベースプレートを下部構造体に対して締結する
が、その際にPC鋼材に緊張力を付与することによって
下部構造体にプレストレスを導入してその曲げ耐力を高
める。
In the present invention, PC steel is used in place of the anchor bolts that have been generally used in the past, and the PC steel is used to fasten the base plate of the steel frame column to the lower structure. At that time, tension force is applied to the PC steel. By applying prestress to the lower structure to increase its bending resistance.

【0006】[0006]

【実施例】以下、本発明の実施例を図面を参照して説明
する。図1および図2は、地下階が鉄筋コンクリート造
とされ、地上階が鉄骨造とされた建築物の構造体の一部
分を示すものであって、図中符号1は地下階の柱(以下
ではRC柱と称す)、2は地下階の梁、3は地上階の鉄
骨柱である。
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a part of the structure of a building in which the basement floor is made of reinforced concrete and the ground floor is made of steel frame. 2 is a beam on the basement floor, and 3 is a steel frame column on the ground floor.

【0007】本実施例においては、RC柱1の柱頭に対
する鉄骨柱3の柱脚の定着は、従来一般に用いられてい
るアンカーボルトに代えてPC鋼材4を用いて行ない、
かつ、そのPC鋼材4を緊張することによりRC柱1に
プレストレスを導入するようになっている。すなわち、
RC柱1の柱頭部には、PC鋼棒あるいはPC撚線等の
PC鋼材4がRC柱1に対して非付着状態(アンボンド
状態)もしくはシース管内に配されて埋設されていて、
それらのPC鋼材4の下端部はRC柱1中に定着され、
上端部はRC柱1の柱頭に突出して鉄骨柱3のベースプ
レート5を貫通するようになっている。そして、それら
PC鋼材4を緊張したうえで、PC鋼材4の上端部にナ
ット6を螺着することによりベースプレート5をRC柱
1の柱頭に対して締結するようにされている。
In this embodiment, the column base of the steel column 3 is fixed to the stigma of the RC column 1 by using the PC steel material 4 in place of the anchor bolts that are generally used in the past.
Moreover, prestressing is introduced into the RC column 1 by tensioning the PC steel material 4. That is,
A PC steel rod 4 or a PC steel material 4 such as a PC twisted wire is embedded in a non-adhered state (unbonded state) or in a sheath tube with respect to the RC column 1 at the head of the RC column 1.
The lower ends of the PC steel materials 4 are fixed in the RC pillar 1,
The upper end portion projects from the stigma of the RC column 1 and penetrates the base plate 5 of the steel column 3. Then, after tensioning the PC steel materials 4, a nut 6 is screwed on the upper end portion of the PC steel materials 4 to fasten the base plate 5 to the stigmas of the RC pillar 1.

【0008】上記の構造では、従来一般に採用されてい
るアンカーボルトに代えてPC鋼材4を用いて鉄骨柱3
をRC柱1に定着するようにしたことにより、少ない本
数のPC鋼材4によって大きな定着力が得られるもので
あり、したがって、従来のように多数のアンカーボルト
を用いずとも、あるいは大掛かりな根巻を行なわずと
も、鉄骨柱3からRC柱1に大きなモーメントを有効に
伝達することができるものとなっている。その結果、従
来のように定着部においてアンカーボルトと鉄筋とが輻
輳して納まりが悪化したり、コンクリートの充填が不十
分となったり、施工が困難となるようなことを防止する
ことができる。
In the above structure, the steel frame column 3 is constructed by using the PC steel material 4 in place of the anchor bolt which has been generally adopted conventionally.
Is fixed to the RC column 1, a large fixing force can be obtained with a small number of PC steel materials 4. Therefore, it is possible to use a large number of anchor bolts without using many anchor bolts as in the conventional case. It is possible to effectively transmit a large moment from the steel frame column 3 to the RC column 1 without performing the above. As a result, it is possible to prevent the anchor bolts and the reinforcing bars from converging in the fixing portion to deteriorate the storage, the concrete filling being insufficient, and the construction difficult as in the conventional case.

【0009】しかも、上記の構造では、PC鋼材4に緊
張力を付与することによりRC柱1にプレストレスを導
入した状態で鉄骨柱3を定着するので、RC柱1の柱頭
部の曲げ耐力が高められて亀裂の発生等が有効に防止さ
れるものであり、このため、RC柱1に対して従来より
大きなモーメントを負担させることが可能となり、その
結果、従来においては梁2に負担せざるを得なかったモ
ーメントもRC柱1に負担させることが可能となって、
その分、梁2の断面を従来より小さくできるという利点
もある。
Moreover, in the above structure, the steel column 3 is fixed in a state where prestress is introduced into the RC column 1 by applying tension to the PC steel material 4, so that the bending strength of the column head of the RC column 1 is increased. The height of the RC column 1 is effectively increased to prevent the occurrence of cracks. Therefore, it becomes possible to load the RC column 1 with a larger moment than before, and as a result, the beam 2 has to be loaded in the conventional case. It is possible to load the RC column 1 with the moment that was not obtained,
Therefore, there is an advantage that the cross section of the beam 2 can be made smaller than the conventional one.

【0010】なお、上記実施例の場合には、地下1階の
部分のRC柱に対しては大きなモーメントが加わるが、
それより下層の階のRC柱にはさほど大きなモーメント
が加わることがないので、プレストレスは上記実施例の
ように地下1階の部分にのみ導入することで通常は十分
であるが、必要であればさらに下層階の柱にもプレスト
レスを導入するようにしても良い。勿論、PC鋼材の本
数や種類は、所望の強度が得られるように適宜設定すれ
ば良い。
In the case of the above embodiment, a large moment is applied to the RC pillar on the first basement,
Since a large moment is not applied to the RC columns on the lower floors, it is usually sufficient to introduce prestress only to the portion of the first basement floor as in the above embodiment, but it is necessary. In addition, prestress may be introduced into the pillars on the lower floors. Of course, the number and types of PC steel materials may be appropriately set so as to obtain a desired strength.

【0011】また、本発明は、鉄骨柱を鉄筋コンクリー
ト造の柱に定着する場合にのみならず、杭や地下外壁等
の他の下部構造体に対して定着する場合にも全く同様に
適用することができる。図3および図4は、鉄筋コンク
リート造の地下外壁10に、柱脚部を拡幅した鉄骨柱1
1を上記と同様のPC鋼材4により定着した場合の例を
示すものであり、さらに図5は、上記の鉄骨柱11を互
いに接するように設けた場合の例であり、いずれも、各
鉄骨柱11を地下外壁10に対して強固に定着できると
ともに、多数のPC鋼材4により地下外壁10に対して
プレストレスを導入できるものである。
Further, the present invention can be applied not only in the case where the steel frame column is fixed to the column made of reinforced concrete, but also in the case where it is fixed to other lower structures such as piles and underground outer walls. You can 3 and 4 show a steel frame column 1 in which a column base is widened on a reinforced concrete underground outer wall 10.
1 shows an example in which 1 is fixed by the same PC steel material 4 as described above, and FIG. 5 shows an example in which the above steel frame columns 11 are provided so as to be in contact with each other. 11 can be firmly fixed to the underground outer wall 10 and prestress can be introduced into the underground outer wall 10 by the large number of PC steel materials 4.

【0012】[0012]

【発明の効果】以上で詳細に説明したように、本発明に
よれば、鉄骨柱のベースプレートを下部構造体に埋設し
たPC鋼材により締結するとともに、そのPC鋼材に緊
張力を付与することによって下部構造体にプレストレス
を導入するようにしたので、少ない本数のPC鋼材によ
って大きな定着力が得られてモーメントを有効に伝達す
ることができるものであり、このため、従来のように定
着部においてアンカーボルトと鉄筋とが輻輳して納まり
が悪化したり、コンクリートの充填が不十分となった
り、施工が困難となるようなことを防止することができ
るとともに、下部構造体の曲げ耐力が高められて亀裂の
発生等が有効に防止される、という優れた効果を奏す
る。
As described above in detail, according to the present invention, the base plate of the steel frame column is fastened by the PC steel material embedded in the lower structure, and the PC steel material is given a tension force to lower the base plate. Since prestress is introduced into the structure, a large fixing force can be obtained with a small number of PC steel materials, and the moment can be effectively transmitted. Therefore, as in the conventional case, the anchor is used in the fixing portion. It is possible to prevent the bolt and the reinforcing bar from converging and worsening the fit, filling the concrete insufficiently, and preventing the construction from becoming difficult, and increasing the bending resistance of the lower structure. It has an excellent effect that cracks are effectively prevented.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る構造の一実施例を示すもので、鉄
骨柱とRC柱との定着部を示す側断面図である。
FIG. 1 is a side sectional view showing an embodiment of a structure according to the present invention and showing a fixing portion of a steel frame column and an RC column.

【図2】同定着部の正断面図である。FIG. 2 is a front sectional view of an identification attachment portion.

【図3】本発明に係る構造の他の実施例を示すもので、
鉄骨柱と地下外壁との定着部を示す側断面図である。
FIG. 3 shows another embodiment of the structure according to the present invention,
It is a sectional side view which shows the fixing | fixed part of a steel frame pillar and an underground wall.

【図4】同定着部の正断面図である。FIG. 4 is a front sectional view of an identification attachment portion.

【図5】本発明に係る構造のさらに他の実施例を示すも
ので、鉄骨柱と地下外壁との定着部を示す正断面図であ
る。
FIG. 5 shows still another embodiment of the structure according to the present invention, and is a front sectional view showing a fixing portion between a steel frame column and an outer underground wall.

【符号の説明】[Explanation of symbols]

1 RC柱(下部構造体) 2 梁 3 鉄骨柱 4 PC鋼材 5 ベースプレート 10 地下外壁(下部構造体) 11 鉄骨柱。 1 RC column (lower structure) 2 Beam 3 Steel column 4 PC steel 5 Base plate 10 Underground outer wall (lower structure) 11 Steel column.

Claims (1)

【特許請求の範囲】 【請求項1】 鉄骨柱の柱脚を鉄筋コンクリート造の下
部構造体に対して定着するための構造であって、前記下
部構造体に埋設したPC鋼材により前記鉄骨柱のベース
プレートを下部構造体に対して締結するとともに、その
PC鋼材に緊張力を付与することによって下部構造体に
プレストレスを導入することを特徴とする柱脚の定着構
造。
Claim: What is claimed is: 1. A structure for fixing a column base of a steel frame column to a reinforced concrete lower structure, wherein a base plate of the steel column is made of PC steel embedded in the lower structure. Is fixed to the lower structure, and prestress is introduced into the lower structure by applying tension to the PC steel material.
JP18929991A 1991-07-03 1991-07-03 Fixing structure of pedestal Pending JPH059944A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18929991A JPH059944A (en) 1991-07-03 1991-07-03 Fixing structure of pedestal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18929991A JPH059944A (en) 1991-07-03 1991-07-03 Fixing structure of pedestal

Publications (1)

Publication Number Publication Date
JPH059944A true JPH059944A (en) 1993-01-19

Family

ID=16239011

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18929991A Pending JPH059944A (en) 1991-07-03 1991-07-03 Fixing structure of pedestal

Country Status (1)

Country Link
JP (1) JPH059944A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002302958A (en) * 2001-04-06 2002-10-18 Taisei Corp Junction structure for vertical member to cast-in-place concrete pile
JP2015017478A (en) * 2013-07-12 2015-01-29 株式会社竹中工務店 Structure for fixing steel column base part
KR102265365B1 (en) * 2020-10-08 2021-06-15 (주)아이원이앤씨 Cast-in place pile for retensioning and reinforcement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002302958A (en) * 2001-04-06 2002-10-18 Taisei Corp Junction structure for vertical member to cast-in-place concrete pile
JP2015017478A (en) * 2013-07-12 2015-01-29 株式会社竹中工務店 Structure for fixing steel column base part
KR102265365B1 (en) * 2020-10-08 2021-06-15 (주)아이원이앤씨 Cast-in place pile for retensioning and reinforcement

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