基于构件变形的RC剪力墙结构#br# 地震抗倒塌准则对比研究

为确定一种能够较为真实地反映RC剪力墙结构接近倒塌状态的抗倒塌判定准则，该文分别从材料、构件和结构层次选取4种具有代表性的抗倒塌准则(弹塑性层间位移角准则、第一竖向构件失效准则、材料应变准则和结构动力失稳准则)进行对比分析。在不考虑结构的扭转效应前提下，以RC构件变形指标限值为墙肢损坏程度的衡量标准，采用基于IDA的倒塌易损性分析方法对11个典型RC剪力墙结构(考虑不同设防烈度、特征周期和结构高度)进行评估，研究各准则的控制严格程度、倒塌概率、CMR随结构参数变化规律以及墙肢实际性能状态等。研究结果表明：第一竖向构件失效准则可合理地判别RC剪力墙结构的临界倒塌状态，具有合适的控制严格程度。

Comparative study on seismic collapse resistance criteria of RC shear#br# wall structures based on component deformation

 In order to determine a collapse resistance criterion which can truly reflect the collapse state of a reinforced concrete (RC) shear wall structure, this paper selects four representative collapse resistance criteria (the elastoplastic inter-story drift ratio criterion, the first vertical component failure criterion, the material strain criterion and the side-sway collapse mechanism criterion) from the material, component and structural levels for comparative analysis. Under the assumption of not considering the torsional effect, the damage degree of the shear wall is measured by the limit value of component deformation. The collapse fragility analysis based on incremental dynamic analysis (IDA)is used to evaluate 11 typical RC shear wall structures (considering the influence of different fortification intensities, site periods and structural height). Comparative study is conducted on different criteria on the degree of control stringency, the probability of collapse, the variation of collapse margin ratio (CMR) with changing the structural parameters and the actual performance levels of shear walls. The results show that the first vertical component failure criterion can determine the critical state of collapse of a RC shear wall structure with a suitable degree of control stringency.