JPH0544255A - Concrete brace for prestress to be introduced into - Google Patents

Concrete brace for prestress to be introduced into

Info

Publication number
JPH0544255A
JPH0544255A JP20296191A JP20296191A JPH0544255A JP H0544255 A JPH0544255 A JP H0544255A JP 20296191 A JP20296191 A JP 20296191A JP 20296191 A JP20296191 A JP 20296191A JP H0544255 A JPH0544255 A JP H0544255A
Authority
JP
Japan
Prior art keywords
brace
prestress
concrete
src
tensile force
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
JP20296191A
Other languages
Japanese (ja)
Inventor
Osamu Hosozawa
治 細沢
Hiroshi Shimada
博志 島田
Keiko Ishii
圭子 石井
Masataka Kodera
正孝 小寺
Akira Emi
暁 恵美
Arata Furuta
新 古田
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.)
Taisei Corp
Original Assignee
Taisei 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 Taisei Corp filed Critical Taisei Corp
Priority to JP20296191A priority Critical patent/JPH0544255A/en
Publication of JPH0544255A publication Critical patent/JPH0544255A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To prevent a brace concrete section from being cracked by providing the brace of a frame formed with SRC construction, with fixing reinforcements, and by setting a PC steel wire with prestress, on the fixing reinforcements. CONSTITUTION:A frame is composed by providing SRC columns A and SRC beans B with an RC brace C. Then, in the axial direction of the RC brace C, a plurality of fixing reinforcements 1 wound up with a spiral reinforcement 2 are arranged, and both the ends of the fixing reinforcements 1 are fixed to the columns A and the beams B. Besides, in the RC brace C, a PC steel wire 3 with prestress is set. Then, a tensile force to be generated on the RC brace C is reduced by prestress component applied to the PC steel wire 3, and a great tensile force is not generated on the RC brace material, and so concrete can be prevented from being cracked.

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RCまたはSRC構造の
架構におけるプレストレスを導入したコンクリートブレ
ースに係るものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-stressed concrete brace for an RC or SRC structure frame.

【0002】[0002]

【従来の技術】従来、図10に示す如く、RCまたはS
RC架構a耐震要素としてRCブレースbが採用される
ことがある。
2. Description of the Related Art Conventionally, as shown in FIG.
RC brace b may be adopted as the RC frame a seismic element.

【0003】[0003]

【発明が解決しようとする課題】この場合、ブレースb
に引張力Tが作用すると鉄筋が伸び、これに伴ってコン
クリートが引張られてひび割れcが生じがちである。本
発明は前記従来技術の有する問題点に鑑みて提案された
もので、その目的とする処は、水平力によりRCブレー
スに生じる引張力を低減し、ひび割れの発生を防止する
点にある。
In this case, the brace b
When a tensile force T is applied to the steel bar, the reinforcing bar is stretched, and along with this, the concrete tends to be pulled and a crack c tends to occur. The present invention has been proposed in view of the above problems of the prior art, and an object thereof is to reduce the tensile force generated in the RC brace by the horizontal force and prevent the occurrence of cracks.

【0004】[0004]

【課題を解決するための手段】前記の目的を達成するた
め、本発明に係るコンクリートブレースは、同ブレース
内にPC鋼材を配設するとともに、同PC鋼材によって
予めプレストレスを導入して構成されている。
In order to achieve the above object, the concrete brace according to the present invention is constructed by arranging a PC steel material in the brace and introducing a prestress in advance by the PC steel material. ing.

【0005】[0005]

【作用】本発明に係るコンクリートブレースは前記した
ように、同ブレースに配設されたPC鋼材に予めプレス
トレス力を導入したことによって、ブレースに生じる引
張力が導入プレストレス分だけ低減され、同プレストレ
ス力が大きければブレース材に大きな引張力が生じるこ
とがなく、コンクリート部におけるひび割れの発生が防
止される。
As described above, in the concrete brace according to the present invention, the prestressing force is preliminarily introduced into the PC steel material arranged in the brace, whereby the tensile force generated in the brace is reduced by the amount of the prestressing introduced. If the prestressing force is large, a large tensile force is not generated in the brace material, and cracking in the concrete part is prevented.

【0006】[0006]

【実施例】以下本発明を図示の実施例について説明す
る。図1においてAはRCまたはSRC柱、BはRCま
たはSRC梁、CはRCブレースで、同ブレースの軸方
向に複数の定着筋1が配設され、同定着筋1の両端部が
前記柱A、梁Bに定着されている。2は定着筋1に捲回
された螺旋状筋で、柱のフープ筋に相当するものであっ
て、ブレースに圧縮力が働いた場合の拘束筋の機能と、
ブレース材のせん断耐力向上の機能とを兼ねる。
The present invention will be described below with reference to the illustrated embodiments. In FIG. 1, A is an RC or SRC column, B is an RC or SRC beam, C is an RC brace, and a plurality of anchor bars 1 are arranged in the axial direction of the brace, and both ends of the identification bar 1 are the pillar A. , Is fixed to the beam B. 2 is a spiral muscle wound around the anchor muscle 1, which corresponds to a hoop muscle of a column, and functions as a restraining muscle when a compressive force acts on a brace,
It also has the function of improving the shear strength of the brace material.

【0007】前記ブレースCにはPC鋼材3が配設さ
れ、同PC鋼材3に予めプレストレス力を導入すること
によって、水平力によってブレースCに生じる引張力
を、導入プレストレス力分だけ低減し、コンクリート部
のひび割れの発生を防止する。図中4は前記PC鋼材3
の定着部である。また同PC鋼材3はプレストレス力が
ブレースCの断面において偏心を生じないように配設さ
れる。(図3(イ)(ロ)(ハ)(ニ)(ホ)参照) 更に定着筋1は図4(イ)に示すようにブレースCの全
断面に配筋されてもよく、図4(ロ)に示すようにブレ
ースCの両端以外の部分で定着筋1を低減してもよい。
A PC steel material 3 is disposed on the brace C, and a prestressing force is introduced into the PC steel material 3 in advance to reduce the tensile force generated in the brace C by the horizontal force by the amount of the introduced prestressing force. , Prevent the occurrence of cracks in the concrete part. In the figure, 4 is the PC steel material 3
It is the fixing unit. Further, the PC steel material 3 is arranged so that the prestressing force does not cause eccentricity in the cross section of the brace C. (See (a), (b), (c), (d), and (e) in FIG. 3) Further, the fixing streak 1 may be arranged in the entire cross section of the brace C as shown in FIG. As shown in (b), the fixing streak 1 may be reduced in a portion other than both ends of the brace C.

【0008】図5(イ)(ロ)はブレースCに対するプ
レストレス力導入範囲を変えた例を示し、図5(イ)は
PC鋼材3の一端を柱パネルゾーン内に定着し、他端を
ブレースCの端部に配設した場合を示し、図5(ロ)は
プレストレス力をブレースC両端の柱梁パネルゾーンを
超えた位置まで導入した例を示す。図6(イ)(ロ)
(ハ)は圧縮力が作用した場合のブレースCの座屈耐力
を向上させるとともに、部材重量を軽減するために、中
空断面のコンクリートブレースを使用した例を示すもの
である。中空部は必要に応じて充填材を注入する場合と
しない場合がある。
FIGS. 5A and 5B show examples in which the prestressing force introduction range for the brace C is changed, and FIG. 5A shows that one end of the PC steel material 3 is fixed in the pillar panel zone and the other end is fixed. FIG. 5B shows an example in which the prestressing force is introduced to a position beyond the column / beam panel zones at both ends of the brace C, showing the case where the brace C is arranged at the end part. Figure 6 (a) (b)
(C) shows an example in which a concrete brace having a hollow cross section is used in order to improve the buckling resistance of the brace C when a compressive force is applied and to reduce the weight of the member. The hollow portion may or may not be filled with a filler as needed.

【0009】図7乃至図9は前記ブレースCを複数のプ
レキャスト部材C1,C2 ,C 3,C4 ,…C m…Cn
より構成した実施例を示し、同各プレキヤストC1 ,C
2 …に埋設されたシース5に亘ってPC鋼材3を挿貫、
緊張して、同PC鋼材3を端部プレキヤスト部材C1
n に定着し、シース5にグラウトを注入するものであ
る。なお定着筋1は端部のプレキヤスト部材C1 ,Cn
に配設されている。また図中6は各プレキヤスト部材に
配設された篭状鉄筋である。
7 to 9 show the brace C having a plurality of precast members C 1 , C 2 , C 3 , C 4 , ... C m ... C n.
An embodiment constituted by the above is shown, and each precast C 1 , C
2 Insert the PC steel material 3 across the sheath 5 embedded in
When tensioned, the PC steel material 3 is attached to the end precast member C 1 ,
After fixing to C n , grout is injected into the sheath 5. The anchor streak 1 is provided with precast members C 1 and C n at the ends.
It is installed in. Reference numeral 6 in the drawing denotes a cage-shaped rebar arranged on each precast member.

【0010】[0010]

【発明の効果】本発明によれば前記したように、RCま
たはSRC構造の架構におけるRCブレースに、PC鋼
材を配設するとともに、予め同PC鋼材にプレストレス
力を導入したことによって、水平力によりブレースに生
じる引張力を導入プレストレス分だけ低減し、同ブレー
スのコンクリート部における引張力によるひび割れの発
生を防止しうるものである。
As described above, according to the present invention, the PC steel material is disposed on the RC brace in the RC or SRC structure frame, and the prestressing force is introduced into the PC steel material in advance, so that the horizontal force is increased. By this, the tensile force generated in the brace can be reduced by the amount of the introduced prestress, and the generation of cracks due to the tensile force in the concrete portion of the brace can be prevented.

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

【図1】本発明に係るプレストレスを導入したコンクリ
ートブレースを有する架構を示す要部縦断正面図であ
る。
FIG. 1 is a longitudinal sectional front view of a main part showing a frame having a concrete brace into which a prestress is introduced according to the present invention.

【図2】前記ブレースの横断平面図である。FIG. 2 is a cross-sectional plan view of the brace.

【図3】(イ)(ロ)(ハ)(ニ)(ホ)は前記ブレー
スにおけるPC鋼材の配置状況を示す横断平面図であ
る。
3 (a), (b), (c), (d), and (e) are cross-sectional plan views showing the arrangement of the PC steel material in the brace.

【図4】(イ)(ロ)は前記ブレースにおける定着筋の
配置例を示す縦断面図である。
4 (a) and (b) are vertical cross-sectional views showing an example of arrangement of fixing lines in the brace.

【図5】(イ)(ロ)は前記ブレースにおけるプレスト
レス力導入範囲の各例を示す縦断面図である。
5A and 5B are vertical cross-sectional views showing examples of the prestressing force introduction range in the brace.

【図6】(イ)(ロ)(ハ)は中空ブレースにおけるP
C鋼材の配置例を示す横断平面図である。
6] (a), (b) and (c) show P in the hollow brace.
It is a cross-sectional top view which shows the example of arrangement | positioning of C steel material.

【図7】本発明に係るプレストレスを導入したブレース
の他の実施例を具えた架構を示す要部縦断正面図であ
る。
FIG. 7 is a vertical cross-sectional front view of essential parts showing a frame structure including another embodiment of the brace in which the prestress according to the present invention is introduced.

【図8】前記ブレースの部分拡大縦断面図である。FIG. 8 is a partially enlarged vertical sectional view of the brace.

【図9】前記ブレースの拡大横断平面図である。FIG. 9 is an enlarged transverse plan view of the brace.

【図10】従来のブレースのコンクリート部が引張力に
よってひび割れを生じる状態を示す説明図である。
FIG. 10 is an explanatory view showing a state in which a concrete portion of a conventional brace is cracked by a tensile force.

【符号の説明】 A RCまたはSRC柱 B RCまたはSRC梁 C RCブレース 1 定着筋 3 PC鋼材 4 PC鋼材の定着部[Explanation of Codes] A RC or SRC Column B BRC or SRC Beam C RC Brace 1 Anchorage 3 PC Steel 4 Anchor of PC

───────────────────────────────────────────────────── フロントページの続き (72)発明者 小寺 正孝 東京都新宿区西新宿一丁目25番1号 大成 建設株式会社内 (72)発明者 恵美 暁 東京都新宿区西新宿一丁目25番1号 大成 建設株式会社内 (72)発明者 古田 新 東京都新宿区西新宿一丁目25番1号 大成 建設株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masataka Kodera 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Within Taisei Construction Co., Ltd. (72) Inventor Akira Emi 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo (72) Inventor Shin Furuta 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Inside Taisei Construction Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 RCまたはSRC構造の架構において、
RCのブレースにPC鋼材を配設するとともに、予め同
PC鋼材にプレストレス力を導入してなり、水平力によ
って前記ブレースに生じる引張力を低減し、ひび割れの
発生を防止するように構成されたことを特徴とするプレ
ストレスを導入したコンクリートブレース。
1. In a frame of RC or SRC structure,
PC steel was placed on the RC brace, and prestressing force was introduced into the PC steel in advance to reduce the tensile force generated in the brace by horizontal force and prevent the occurrence of cracks. A concrete brace that introduces prestress that is characterized.
JP20296191A 1991-08-13 1991-08-13 Concrete brace for prestress to be introduced into Pending JPH0544255A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20296191A JPH0544255A (en) 1991-08-13 1991-08-13 Concrete brace for prestress to be introduced into

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20296191A JPH0544255A (en) 1991-08-13 1991-08-13 Concrete brace for prestress to be introduced into

Publications (1)

Publication Number Publication Date
JPH0544255A true JPH0544255A (en) 1993-02-23

Family

ID=16466033

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20296191A Pending JPH0544255A (en) 1991-08-13 1991-08-13 Concrete brace for prestress to be introduced into

Country Status (1)

Country Link
JP (1) JPH0544255A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015034444A (en) * 2013-08-09 2015-02-19 高周波熱錬株式会社 Reinforcement device and reinforcement method for structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015034444A (en) * 2013-08-09 2015-02-19 高周波熱錬株式会社 Reinforcement device and reinforcement method for structure

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