An analytical model for inelastic cyclic response of eccentrically braced frame with vertical shear link (V-EBF)

Jack Bouwkamp , Mohamad Ghasem Vetr , Ali Ghamari
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引用次数: 45

Abstract

Eccentrically Braced Frames (EBFs) have a capability of energy dissipation relying on horizontal link beams in main frame. Use of vertical link (V-EBF) enhances system performance; main frame damaged, easy replaces after earthquake, and it can be rehabilitated minor changes of existing structure. This paper describes experimental and analytical study of the V-EBF system. Experimental results showed that ultimate shear strength of vertical link is more than two times of yielding strength. In analytical model, Kinematic-Isotropic strain hardening for shear, and only Kinematic for moment, showed accurate results with an upper bound for yielding surface to the vertical link.

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带竖向剪力杆偏心支撑框架的非弹性循环响应解析模型
偏心支撑框架依靠主框架内的水平连接梁具有一定的耗能能力。垂直链接(V-EBF)的使用提高了系统性能;主框架损坏,地震后易于更换,并可对现有结构进行微小的改造。本文介绍了V-EBF系统的实验和分析研究。试验结果表明,竖向连杆的极限抗剪强度是屈服强度的2倍以上。在解析模型中,对剪切采用运动学-各向同性应变硬化,而对弯矩只采用运动学应变硬化,得到了准确的结果,并给出了垂直连杆屈服面的上界。
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