基于能力谱法原理的改进模态静力弹塑性分析

英文篇名：MODAL PUSHOVER ANALYSIS IMPROVED BY CAPACITY-SPECTRUM THEORY
中文刊名：工业建筑
英文刊名：Industrial Construction
作者：辛力 ; 王敏 ; 曾凡生 ; 梁兴文
英文作者：Xin Li1 Wang Min1 Zeng Fansheng1 Liang Xingwen2(1.Northwest Building Design & Research Institute Co.Ltd ; Xi’an 710003 ; China ; 2.Xi’an University of Architecture and Technology ; Xi’an 710055 ; China)
中文关键词：模态静力弹塑性分析 ; 动力时程分析 ; 能力谱法 ; 性能目标
英文关键词：modal pushover analysis ; non-linear time-history analysis ; capacity-spectrum method ; performance objective
出版日期：2011-01-20
机构：中国建筑西北设计研究院有限公司;西安建筑科技大学;
年：2011
期：01
出版单位：工业建筑

摘要

模态静力弹塑性分析法中,动力时程分析部分的可操作性较差,且分析结果不稳定。用能力谱法替代原有的动力时程分析,在现行规范加速度反应谱基础上计算结构各振型等效单自由度体系各性能水平的位移反应,然后将其转化为相应多自由度结构的位移反应,并通过平方和开方法求得结构的总位移反应,用其与结构某一性能水平的位移(层间位移角)限值进行比较,判断设计结果是否满足性能目标要求。该方法改善了模态静力弹塑性分析法的可操作性,使其评估结果更加稳定。
In the procedure of modal pushover analysis,non-linear time-history analysis is not so operative and its analytical result is unstable,the capacity-spectrum theory is used to take the place of dynamic time-history anslysis.Converting the acceleration response spectrum of current code into displacement response spectrum,the displacement response of equivalent single degree of freedom in each mode of vibration can be calculated by capacity spectrum method.Then the displacement response of multi-degree of freedom can be obtained too,and it is used to compare with the corresponding displacement(storey drift ratio) limits,judging whether the structure satisfies its performance objective or not.The proposed method improves the modal pushover analysis’operation and stability.

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