孙逊，方立新，邱一峰，战龙龙，陈庚俊

（东南大学土木工程学院， 南京 210096）

 

［摘要］屈曲约束支撑（BRBs）框架因具有良好的耗能能力而被越来越多的多、高层结构所采用，但其结合整体结构在不同设防烈度水准下全过程的受力和变形特征并未被引起重视。人民日报社报刊综合业务楼是在高烈度区全面采用屈曲约束支撑的高层钢结构建筑，对该结构进行了设防烈度和罕遇烈度地震作用下的弹塑性时程分析。重点揭示了屈曲约束支撑的耗能能力、实际的变形情况、结构的残余变形，以及屈曲约束支撑对其他主体结构构件的影响等。对于采用BRBs作为主要抗侧力构件的高层钢结构，在遭遇设防烈度以上地震时，抗力由支撑向框架转移的现象是明显的，框架部分特别是框架梁的耗能和损伤不容忽视。

［关键词］高层钢结构；屈曲约束支撑；弹塑性时程分析；残余变形

中图分类号：TU311-3文献标识码：A文章编号：1002-848X(2012)09-0056-05

 

Sun Xun, Fang Lixin, Qiu Yifeng, Zhan Longlong, Chen Gengjun

( School of Civil Engineering, Southeast University, Nanjing 210096, China )

 

Abstract: The buckling resistance braces (BRBs) are widely used in the multiple and high-rise structures due to its well energy dissipation capacity, but the loading and deflection characteristics of the whole structure with the BRBs still need to be further studied. The People’s Daily office building is the first high-rise steel frames with the BRBs as the main role to resist the horizontal loads. The elasto-plastic time history analysis method was used to study the structural performance under the moderate and severe earthquakes. The strain of the BRBs, the residual drifts of the structures and the yield status of the structural members were be found. The results revealed the loading shift from the braces to the frames under the moderate or severe earthquake, the frames in the high-rise buildings still play the main role in resisting the horizontal loads, the energy dissipation and the damage of frame beams cannot be ignored.

Keywords: high-rise steel structure; buckling resistance brace; elasto-plastic time history analysis; residual deformation

作者简介：孙逊，博士，一级注册结构工程师，Email: sunxun@seu.edu.cn。

 

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