不同R-μ-T关系对比研究及其在高层混合结构位移需求估计中的应用  

The comparison of R-μ-T relationships and their application in the displacement demand evaluation of high-rise structures

作　　者：黄志华[1] 吕西林[1] 周颖[1] 卜一[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《地震工程与工程振动》2009年第2期42-50,共9页Earthquake Engineering and Engineering Dynamics

基　　金：973计划项目(2007CB714202);国家自然科学基金项目(50708071)

摘　　要：本文结合弹塑性反应谱的研究,给出了求解钢框架-钢筋混凝土核心筒混合结构位移需求的基本步骤,并采用不同的R-μ-T关系计算了某15层混合结构的位移需求。结果表明:选取不同模型计算所得的位移需求有一定的偏差,偏差大致在25%以内,其中Newm ark&Hall模型会较大幅高估结构的位移需求。通过比较,本文最终选取吕西林、周定松模型,其估计的位移需求与弹塑性时程分析结果的偏差基本控制在30%以内,可以为工程界接受。对比分析不仅表明了选取该模型的合理性,同时说明弹塑性反应谱法是一种比较有效的估计此类结构位移需求的方法,在混合结构基于性态的抗震设计中具有应用价值。Based on the research of inelastic response spectra, the paper puts forward the process of how to find the displacement demand of steel frame-reinforced concrete core hybrid structures. The displacement demand of a 15 - storey hybrid structure is then calculated by adopting various R -μ -T relationships. The results demonstrate that the difference of displacement demand obtained from various R -μ -T relationships is within 25% and the demand will be overestimated if Newmark ＆ Hall model is used. Finally, the LU Xilin ＆ ZHOU Dingsong model is chosen. The error from the chosen model and the inelastic time-history analysis is within 30%, which could be accepted by engineers. So, the chosen model is reasonable and the method presented in the paper to evaluate the displacement demand of hybrid structures is applicable in performance-based seismic design.

关 键 词：弹塑性反应谱 钢框架-钢筋混凝土核心筒混合结构 位移需求 

分 类 号：P315.95[天文地球—地震学]