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新型中心支撑钢框架抗震性能研究 预览 被引量:1

Seismic Performance a New-type Centrically Braced Steel Frame
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摘要 基于某超高层钢框架-核心筒结构的设计优化,提出了一种改进的单斜杆中心支撑形式.该支撑形式构造简单,构件截面选取灵活,具有合理的弹塑性耗能机制及屈曲模态.弹性反应谱及罕遇地震弹塑性动力时程分析表明,该新型支撑钢框架对整体结构抗侧贡献显著,在罕遇地震下耗能充分,能有效防止结构构件的破坏,且兼顾强度和延性两种性能要求.在保证良好性能表现的基础上,其支撑构件总用钢量仅为传统中心支撑设计的72.1%,具有显著的经济效益. Based on optimization design of a high-rise steel frame-tube structure,this paper puts forward a type of improved single diagonal centric brace.The new-type brace possesses briefness and flexibility,meanwhile it has rational energy dissipation mechanism and buckling mode.Results of response spectrum and elasto-plastic time-history analysis indicate that new-type braced frame has satisfactory seismic performance both in strength capacity and ductility.The new-type brace contributes remarkably to overall lateral stiffness and seismic energy dissipation.With its application,preferable seismic behavior and economy will be obtained in comparison to traditional centrically braced frame.
作者 欧阳倩雯 翟永梅 OUYANG Qianwen1 ZHAI Yongmei1, 2 ( 1. Research Institute of Structural Engineering and Disaster Prevention, Tongji University, Shanghai 200092, China; 2. Shanghai Institute of Disaster Prevention and Relief, Shanghai 200092, China)
出处 《结构工程师》 北大核心 2013年第6期92-97,共6页 Structural Engineers
关键词 中心支撑 优化设计 抗震性能 centric brace optimization design seismic performance
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参考文献11

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