基于侧向力加载方式的Pushover分析方法

静力弹塑性(Pushover)分析方法作为一种评估结构抗震性能的非线性分析方法,具有简便、实用、可靠的优点,近年来在国内外得到了广泛的关注和研究。针对静力弹塑性分析方法的研究热点问题——侧向力加载模式作了详细的介绍和深入的分析,在此基础上对两个混凝土框架高层结构(分别为平面不规则和规则的结构)进行了基于侧向力加载模式的推覆分析。对比分析了不同侧向力加载模式下的基底剪力-顶点位移关系曲线和层间位移角关系曲线,认为基于均匀分布模式和倒三角分布模式的推覆分析对实际工程的弹塑性分析具有指导意义,自适应分布模式的推覆分析方法可以代替弹塑性时程分析方法来评估结构的抗震性能。

STUDY ON PUSHOVER ANALYSIS METHOD BASED ON LATERAL LOADING PATTERN

Pushover analysis method is a nonlinear method for structure seismic evaluation,which is widely focused on and studied at home and abroad due to its advantages of simplification,practicality and reliability.It was introduced and analysed the hotspot of research on static elastic-plastic analysis method—lateral loading pattern.Based on which two concrete frame high-rise buildings were analyzed by pushover analysis method based on lateral loading pattern.Last,it was analyzed base shear vs top displacement curve and inter-story drift curve,and concluded that static elastic-plastic analysis method based on uniform distribution load pattern and triangle distribution load pattern has a guidance to elastic-plastic analysis of practical projects and that static elastic-plastic analysis method based on modal adaptive distribution load pattern can be used to evaluate structure seismic performance instead of time-history analysis method.