【摘要】 研究现有钢筋混凝土框架结构性能指标的不足.基于损伤力学理论和现有试验结果,提出一种新的结构抗震性能评价指标.对一个6层钢筋混凝土框架结构分别进行静力弹塑性分析及7度多遇地震和7度罕遇地震下的动力时程分析,并与Ghobarah性能指标进行比较.结果表明,在7度多遇地震下,两者相差8.9%;在7度罕遇地震下,差值扩大至14.2%.指出仅考虑结构初期地震响应的Ghobarah性能指标可能会低估实际结构的破坏情况.更多还原

【Abstract】 Some existing seismic performance parameters were reviewed and analyzed.A new structural performance evaluation index was proposed on the basis of the concept of damage mechanics and existing experimental results,is proposed.A 6-story reinforced concrete frame structure subject to earthquake action of Grade 7 was analyzed by pushover analysis and time-history dynamic analysis.The proposed index is compared with Ghobarah performance index.The results show that there is a difference of 8.9% for frequently occurred Grade 7 earthquake and a difference of 14.2% for rarely occurred Grade 7 earthquake.Ghobarah index,which only considers initial seismic response of structures,may underestimate the actual structural damages.The proposed performance index can give a simple,reasonable and reliable assessment of the structural performance level under earthquakes actions.更多还原