第39第3期 2017年6月
土水建筑与环境工程
Journal of Civil,Architectural &. Environmental Engineering
doi;10. 11835/j. issn., 1674-4764. 2017.03. 012
Vol. 39 No. 3 2znn
地震作用下框架整体与局部损伤的相关性
刘哲锋，陈逵，赵鹏，陈蔚
（长沙理工大学土木与建筑学院，长沙410004）
摘要：根据框架结构耗散塑性变形能与存储弹性变形能能力的损失界定结构的整体损伤，根据塑性较耗敬塑性变形能能力的损失来界定局部损伤，并以拟力法为基础推导了局部损伤与整体损伤的解析表达式，进而讨论框架结构局部损伤与整体损伤的相关性。研究表明，控制框架结构整体损伤的手段有：减小局部损伤区域的强度衰减、提高局部损伤区域的极限转动能力和减小局部损伤区域的残余变形。其机理是通过提高局部损伤区域的耗能能力与约束能力来提高整个结构耗散与存储地震能量的能力；框架结构整体损伤与局部损伤的加权值较为接近，可以采用框架局部损伤的加权值来近似估计结构的整体损伤值。
关键词：框架结构；拟力法；地震能量；整体损伤；局部损伤
中图分类号：TU375.4
文献标志码：A
文章编号：1674-4764(2017)03-0092-07
Correlationbetweenglobal damageindexandlocaldamageindexes
for the seismic performance assessment of framework
LiuZhefeng,ChenKui,ZhaoPeng,ChenWei
(School of Civil Engineering and Architecture, Changsha University of
Science &, Technology, Changsha 410004, P. R. China)
Abstract: The global damage index of frame is defined as the loss of the strain energy dissipation capability during the pushover process, and the local damage index of plastic hinge is defined as the loss of hysteretic energy dissipation capability during the pushover process.Based on the force analogy method, the analytical expressions of the global local damage index are proposed. Besides, the correlation between global damage index and local damage indexes are discussed. The results show that improving hysteretic energy dissipation capability and constraint capacity to elastic portion of plastic hinges will effectively improve the strain energy dissipation capability of frame. There are three specific ways: reducing strength degradation, residual deformation and improving rotation capacity of plastic hinges. The global damage index is generally closed to weighted value of local damage indexes which taking the ratio of hysteretid energy dissipated by plastic hinge to total value dissipated by frame as weight. Therefore, the weighted
value of local damage indexes could be used to estimate the global damage index of structure Keywords:frame work; force analogy method; seismic energy; global damage; local damage
收稿日期：2016-12-01
基金项目：国家自然科学基金（50908022）
作者简介：刘哲锋（1976-），男，副教授，博士，主要从事高层建筑抗震研究，（E-mail）1zf0072006@163.com。 Received:2016-12-01
Foundation item:National Natural Science Foundation of China （No.50908022)
Author brief: Liu Zhefeng (1976-), associate professor, PhD, main research interest: seismic design of high-rise
buildings,（E-mail)Izf0072006@163.com.
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