高强钢筋对框架结构抗震破坏机制及性能控制的研究.PDF

第 28 卷第 1 期 工程抗震与加固改造 Vol. 28 ,No 1 　 2006 年 2 月 Earthquake Resistant Engineering and Retrofitting Feb. 2006 　 ( ) [文章编号] 2006 高强钢筋对框架结构抗震破坏机制和性能控制的研究 □叶列平 ,Asad U Q ,马千里 ,陆新征清华大学土木工程系 ; 清华大学结构工程与振动教育部重点实验室 [摘 　要] 　本文针对钢筋混凝土框架结构 ,在柱中配置高强钢筋作为纵筋 , 以实现对结构抗震破坏机制和性能的控制,并利 用其弹性恢复特性 ,减小结构震后的残余变形。论文采用弹塑性时程分析方法 ,通过普通配筋和高强配筋的两个 3 层框架结 构的地震响应分析 ,研究了高强钢筋对框架结构抗震破坏机制和性能控制的效果 ,及其地震响应和震后残余变形。研究结果 表明 ,采用高强钢筋配筋后 ,不仅提高了框架结构整体抗震承载力 ,而且完全避免了出现柱铰屈服机制 ,并且地震后结构具有 很小的残余变形 ,结构的损伤仅发生于框架梁端 ,有利于震后的加固修复。 [ 关键词] 　抗震 ;高性能钢筋 ;框架结构 ;被动控制 ;破坏机制 ;残余变形 [ 中图分类号] 　TU3754 　　　[文献标识码] 　A Study on Failure Mechanism and Seismic Performance of Passive Control RC Frame against Earthquake Department of Civil Engineering , Tsinghua University , Beijing 100084 , □ Ye Lieping , Asad U Q , Ma Qianli , Lu Xinzheng China ; Key Laboratory of Structural Engineering and Vibration of China Education Ministry , Tsinghua University , Beijing 100084 , China Abstract :To achieve better structural performance during earthquake and to minimize rehabilitation and strengthening costs after seismic event is the main objective of the earthquake resistant design. With the invention of the high performance materials and their introduction to the structures , the failure mechanism and seismic performance , especially the residual deformation , can be improved. The Passive Control RC Frame (PF) reinforced with high strength reinforcements in columns are investigated with nonlinear time history analysis method in this paper. It is found that the high strength reinforcements not only provides the RC frame more resistance against lateral earthquake loadings but also reduced the residual