阻尼填充墙简化力学模型研究

Study on simplified mechanical model of infilled damping wall

对阻尼填充墙砌体单元与框架柱的相互作用过程、阻尼填充墙的抗侧力及耗能机理、阻尼填充墙对框架梁的作用、填缝措施的作用等进行分析,揭示阻尼填充墙的工作机理,给出阻尼填充墙的破坏形态;在此基础上,用两根串联有弹簧-黏壶单元的斜撑表征阻尼填充墙对框架的刚度和耗能贡献,提出阻尼填充墙的简化力学模型——双斜撑模型;通过理论推导,得出阻尼填充墙双斜撑模型相关参数的计算公式,并采用该模型对框架阻尼填充墙进行水平循环荷载作用下的滞回性能分析,分析结果表明,阻尼填充墙双斜撑模型的分析结果与试验结果及仿真结果吻合良好。

By analyzing the interaction between masonry units of infilled damping wall （IDW） and surrounding columns, the lateral resistance and energy dissipation mechanisms of IDW, the effects of IDW on upper beams, the effects of filling detailing, the working mechanism of IDW was investigated, and the failure modes of IDW were also studied. Based on the analysis results, a simplified model of IDW was proposed, which uses two struts modeled by spring-dashpot elements to consider the wall＇ s stiffness and energy dissipation contribution. Computational formulas for model parameters were presented. Finally, the hysteresitic performance of IDW-frame structures was analyzed by utilizing the simplified model. The result suggests that the analysis results of the two struts model agree well with the test results and the results of the fine element analyses.