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浙江大学学报(工学版)
J4  2013, Vol. 47 Issue (10): 1815-1823    DOI: 10.3785/j.issn.1008-973X.2013.10.017
    
Refined study on lateral-force resistance of dual structural system composed of moment-resisting frame and chevron braces
ZHANG Lei, LUO Gui-fa, TONG Gen-shu
Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China
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Abstract  

To investigate the post-buckling strength of the compressive brace in the chevron braced frame, the strength of the moment-resisting frame to the behavior of the dual structural system and the lateral load carrying capacity of the dual structural system, a series of nonlinear finite element analysis were conducted on the dual structural system using 50 typical numerical examples considering the provisions of the current design code. Special concerns were paid on the performances of the two substructures of the dual structural system, the moment-resisting frame and the chevron braces, in the entire loading history and their contributions to the behavior of the dual structural system. Results show that the lateral loading capacity of the dual system may rapidly decrease after the buckling of the compressive brace, where the decrease magnitude in the lateral loading capacity depends largely on the relative strength of the moment-resisting frame. The lateral loading capacity of the dual system may not be the sum of those of its two substructures. A refined method for the unbalance force acting at the beam of the chevron braced frame was proposed based on the analysis results.

Published: 01 October 2013
CLC:  TU 391  
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Cite this article:

ZHANG Lei, LUO Gui-fa, TONG Gen-shu. Refined study on lateral-force resistance of dual structural system composed of moment-resisting frame and chevron braces. J4, 2013, 47(10): 1815-1823.

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http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2013.10.017     OR     http://www.zjujournals.com/eng/Y2013/V47/I10/1815


人字撑-钢框架弹塑性抗侧性能的精细化研究

为了研究人字撑-钢框架双重抗侧力结构体系中受压支撑屈曲后的剩余强度、框架抗侧强度对结构体系抗侧性能的影响以及结构体系的最大抗侧承载力等问题,在考虑现行规范相关规定的基础上,设计50个典型人字撑-框架结构算例,开展弹塑性抗侧性能的非线性有限元分析.研究组成结构体系的2个子结构支撑架和框架在整个抗侧过程中的性能及其对结构体系总的抗侧性能的影响.结果表明,结构体系的抗侧性能在压撑屈曲后存在快速下降,框架的相对强弱对下降幅度具有重要的影响|框架与支撑的极限承载力之和不能作为结构体系的抗侧承载能力.根据计算结果提出人字撑横梁承受的不平衡力的改进计算方法.

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