低层双面叠合夹心保温剪力墙结构动力弹塑性分析研究

Study on dynamic elasto-plastic analysis of low-rise double-faced superimposed sandwich insulation shear wall structure

基于足尺模型振动台试验,对低层双面叠合夹心保温剪力墙结构进行动力弹塑性分析,并对数值计算结果和振动台试验结果进行对比,结果表明,有限元计算的结构响应及构件损伤情况基本和振动台试验结果相吻合,7度罕遇地震时该结构基本处于弹性状态,8度罕遇地震时构件损伤发展,9度罕遇地震时结构进入弹塑性状态,但变形满足大震不倒的要求。对有外叶墙模型和无外叶墙模型的动力弹塑性计算结果进行对比,随着输入地震波峰值加速度增大,两者结构响应发展趋势基本一致,无外叶墙模型的结构位移响应略大于有外叶墙模型,两者构件损伤位置和损伤发展趋势基本一致,无外叶墙模型墙体损伤程度略大。分析结果表明,在结构弹塑性状态下,外叶墙和桁架筋对结构抗震能力具有一定贡献,降低结构在地震作用下的损伤。

Based on the full-scale shaking table test,the dynamic elasto-plastic analysis of the low-rise double-faced superimposed sandwich insulation shear wall structure was carried out,and the numerical calculation results with the shaking table test results were compared.The results show that the structural response and damage calculated by finite element analysis are almost consistent with the results of the shaking table test.The structure is basically in an elastic state during the 7 degree rare earthquake,the component damage develops during the 8 degree rare earthquake,and the structure enters an elastic-plastic state during the 9 degree rare earthquake,but it’s deformations meet the requirements of no collapse under rare earthquake.The dynamic elastic-plastic calculation results of the model with and without outer prefabricated wall were compared.With the increase of the peak acceleration of the input seismic wave,the development trend of the structural response of the two models is basically consistent.The displacement response of the model without outer prefabricated wall is slightly greater than that of the model with outer prefabricated wall.The damage location and damage development trend of the two models are basically consistent,and the damage degree of the model without outer prefabricated wall is slightly greater.The analysis results show that under the elastic-plastic state of the structure,the outer prefabricated wall and truss reinforcement connectors have contribution to the seismic capacity of the structure and reduces the damage of the structure under seismic load.