Journal of South China University of Technology(Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (12): 144-151.

• Architecture & Civil Engineering • Previous Articles     Next Articles

IDA-Based Seismic Fragility Analysis of Transfer Frame with Energy Dissipation Haunch Braces

He Ming-ji1  Wu Yi2  Cai Jian1,3   Huang Yan-sheng1,3  Yang Chun1,3   

  1. 1. School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China;2. School of Civil Engineering,Guangzhou University,Guangzhou 510006,Guangdong,China;3. State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-05-27 Revised:2011-08-31 Online:2011-12-25 Published:2011-11-04
  • Contact: 吴轶(1973-) ，女，博士，教授，主要从事钢－混凝土组合结构与结构抗震减震研究． E-mail: wya2103@163．com E-mail:nikko-1983@163.com
  • About author:何铭基(1983-) ，男，博士，主要从事钢－混凝土组合结构与结构抗震减震研究．
  • Supported by:

    广东省自然科学基金资助项目( 8151009101000010，8451064101000286) ; 国家自然科学基金青年基金资助项目( 51108104) ; 亚热带建筑科学国家重点实验室资助项目( X2TJ-C709025z) ; 亚热带建筑科学国家重点实验室自主研究课题( 2011ZC25，2011ZC28) ; 亚热带建筑科学国家重点实验室开放课题( 2012KB06) ; 广州市教育局科技资助项目( 10A041)

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Abstract:

Based on the incremental dynamic analysis ( IDA) ,the seismic fragility of RC ( Reinforced Concrete) transfer frame structures with and without energy dissipation haunch braces ( EDHBs) was investigated,and the corresponding fragility curve equations were established. The seismic reliability of the structure with EDHBs was then evaluated,and the influences of buckling-restrained EDHBs on the failure mechanism of the structure were analyzed. The results show that,by setting buckling-restrained EDHBs,the exceeding probability of the RC transfer frame structure in different damage states decreases by 5% ～ 80%; and that EDHBs change the soft-storey failure mechanism at the transfer storey and the neighboring stories and effectively alleviate the damage of transfer components,thus preventing the structure from global and local collapses. In addition,as EDHBs may result in large additional shear force on the RC column,steel-concrete composite components are more feasible in constructing steelreinforced concrete transfer structures with EDHBs.

Key words: energy dissipation haunch brace, reinforced concrete, transfer frame structure, incremental dynamic analysis, seismic fragility, failure mechanism

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