连于人字形防屈曲支撑的横梁抗震设计探讨

丁玉坤; 张耀春

doi:10.13204/j.gyjz200910026

连于人字形防屈曲支撑的横梁抗震设计探讨

doi: 10.13204/j.gyjz200910026

1.
哈尔滨工业大学土木工程学院,哈尔滨 150090

基金项目:

国家自然科学基金重大项目(59895410);国家科技支撑计划(2006BAJ01B02-01-04)

详细信息

作者简介:
丁玉坤，男，1979年1月出生，讲师。E-mail:dingyukun.student@sina.com

计量
- 文章访问数: 88
- HTML全文浏览量: 7
- PDF下载量: 51
- 被引次数: 0
出版历程
- 收稿日期: 2009-02-20
- 刊出日期: 2009-10-20

STUDY ON SEISMIC DESIGN OF THE BEAM CONNECTED BY THE CHEVRON BUCKLING-RESTRAINED BRACES

1.
School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China

摘要

摘要: 通过3个算例,对采用人字形无粘结内藏钢板支撑剪力墙(即人字形防屈曲支撑)的防屈曲支撑框架结构的抗震性能进行对比分析,以探讨支撑屈服后超强和被撑梁跨中竖向支点作用的有无对支撑跨横梁抗震性能的影响。结果表明,3个算例的框架梁在多遇地震下均能保持弹性,且被撑梁的最大竖向挠度均出现在撑点两侧。罕遇地震下,3个结构中支撑屈服后被撑梁的最大竖向挠度均出现在撑点位置。考虑超强但不考虑支点作用设计的结构中框架梁塑性发展程度较小,而不计超强但考虑支点作用设计的被撑梁塑性发展严重,且横梁的挠度较大,导致层间的两根支撑因承受较大的竖向力而使拉、压支撑的轴向应力-应变曲线明显不对称,不利于支撑受力。
- 防屈曲支撑 /
- 人字形无粘结内藏钢板支撑剪力墙 /
- 支撑框架 /
- 地震反应分析 /
- 滞回性能
Abstract: A seismic response analysis is carried out in order to compare the aseismic performance of three buckling-restrained braced frames(BRBFs).The effects of the two factors,including overstrength of the postyield buckling-restrained brace (BRB) due to the strain-hardening effect and the vertical support for the braced beam by this brace,on the aseismic performance of the beam braced by the chevron unbonded steel plate brace encased in reinforced concrete panel(socalled chevron BRB) are discussed.The analysis reveals that the beams in the three structures remain elasticity under frequent earthquake.The maximum vertical deflection of the beam connected by the chevron braces occurs in the segments of beam between the column and braced points before the brace yielding.Under severe earthquake,the maximum vertical deflection of the braced beams occurs at braced points. The beams designed by taking account of support action of braces but omitting the overstrength of braces develop large plastic deformation,resulting in the slightly larger deflection of the connected beams and the larger vertical gravity forces supported by the chevron BRBs,which make axial plastic deformation of the brace in compression be larger than that of the brace in tension.Whereas,little plastic deformation occurs in the beams designed by taking account of the overstrength but omitting the support action of the braces.
- buckling-restrained brace /
- chevron unbonded steel plate brace encased in reinforced concrete panel /
- braced frame /
- seismic response analysis /
- hysteretic behavior

HTML全文

参考文献(14)

AISC.Seismic Provisions of Structural Steel Buildings[S].Chicago:American Institute of Steel Construction,2005.

[2] FEMA.NEHRP Recommended Provisions for Seismic Regulations forNewBuildings and Other Structures[S].Washington:FEMA 450,Federal Emergency Management Agency,2003.

[3] 丁玉坤,张耀春.不失稳支撑及不失稳支撑框架结构研究现状[J].哈尔滨工业大学学报,2007,39(4):514-520.

[4] Sabelli R,Pottebaum W,Brazier J C,et al.Design of a Buckling-Restrained Braced Frame Utilizing 2005 Seismic Standards[J].Structures 2005,2005:171-181.

[5] L幃pez W A,Sabelli R.Seismic Design of Buckling-RestrainedBraced Frames[R].Steel Tips,Structural Steel Education Council,Moraga,Calif,2004.

[6] 蔡克铨,翁元滔,林圣霖.实尺寸三层CFT/BRB构架试体之性能设计[C]//第三届两岸结构与大地工程研讨会论文集.台北:2003:307-314.

[7] Sabelli R,Mahin S,Chang C.Seismic Demands on Steel BracedFrame Buildings with Buckling-Restrained Braces[J].EngineeringStructures,2003,25:655-666.

[8] Clark P,Aiken I,Kasai K,et al.Design Procedures for BuildingsIncorporating Hysteretic Damping Devices[C]//Proceedings,69thAnnual Convention.SEAOC,Santa Barbara,California,1999.

[9] KimJ,Choi H.Behavior and Design of Structures with Buckling-Restrained Braces[J].Engineering Structures,2004,26:693-706.

[10] Fahnestock L A,Sause R,Ricles J M.Seismic Response andPerformance of Buckling-Restrained Braced Frames[J].Journal ofStructural Engineering,ASCE,2007,133(9):1195-1204.

[11] Tremblay R,Lacerte M,Christopoulos C.Seismic Response ofMultistory Buildings with Self-Centering Energy Dissipative Steel Braces[J].Journal of Structural Engineering,ASCE,2008,134(1):108-120.

[12] GB500112001建筑抗震设计规范[S].

[13] JGJ 9998高层民用建筑钢结构技术规程[S].

[14] CECS 160∶2004建筑工程抗震性态设计通则(试用)[S].

施引文献

资源附件(0)

访问统计