基于倒塌分析的板柱-剪力墙结构抗震性能研究

Research on seismic performance of slab-column shear wall structure based on collapse analysis

为准确揭示板柱-剪力墙结构抗震薄弱部位和地震作用下的倒塌机制,基于ABAQUS软件显式计算平台进行二次开发,开发的程序可对地震作用下的建筑结构进行倒塌数值仿真。首先,从构件和整体层面对开发程序计算结果的可信性予以验证。其次,结合某板柱-剪力墙结构工程实例,进行中震、大震、超大震弹塑性时程分析及倒塌数值仿真。通过对比分析,认为精细化弹塑性时程计算分析成果优于等效弹性算法,设置暗梁对提高结构抗倒塌能力作用显著。提出通过适当增加底部楼层墙厚和主要墙肢配筋率来提高结构抗倒塌能力的方法,该方法既能显著提高结构的抗震性能,又确保最大程度考虑经济性因素。

In order to accurately reveal the collapse mechanism of weak parts of slab-column shear wall structure under earthquake actions,explicit computing platform of ABAQUS software was used for secondary development. The calculation program was suitable for simulating the collapse of the building structure subject to the earthquake. First,the credibility of the results of the development program was verified from the component and overall levels. Secondly,combined with the engineering example of a slab-column shear wall structure,the elasto-plastic time-history analysis and the numerical simulation of the collapse process were conducted under the fortification,rare and super rare earthquakes. Through the contrast analysis,the results show that the precise elastic-plastic time history analysis is obviously superior to the equivalent elastic algorithm method,and setting of inner beam is helpful to improve the anti-collapse ability of the structure. A method of improving the collapse resistance of the structure by increasing the thickness of the bottom floor and the reinforcement ratio of the main wall was put forward. This method can not only significantly improve the seismic performance of the structure,but also ensure the economy to the greatest extent.