填充墙钢筋混凝土框架结构简化分析模型及抗震性能系数研究

对结构进行动力和静力分析时，构件单元和模型的准确性将直接影响到分析结果。为在建立填充墙钢筋混凝土(reinforced concrete, RC)框架简化模型时选择合适的单轴材料与简化模型，使用OpenSees基于3种单轴材料与4种填充墙简化模型结合填充墙RC框架试验对模型的准确性与适用性进行了对比分析。根据对比结果建立填充墙RC框架结构模型，采用Pushover方法对结构进行了整体抗震性能系数的分析。结果表明：Hysteretic材料可以准确地模拟滞回曲线的形状及峰值承载力；单撑杆模型对填充墙的峰值承载力、割线刚度、残余变形模拟较准确；五撑杆模型对填充墙的峰值承载力与初始刚度模拟较准确；满布布置的填充墙可增大RC框架结构的整体抗震性能系数，底层不布置填充墙会明显导致结构整体抗震性能系数的降低。因此，仅研究填充墙平面内问题时选用单撑杆模型即可，在设计时要考虑填充墙的布置，避免出现底部薄弱层而影响整个结构的安全。

Study on Simplified Analysis Model and Seismic Performance Coefficient of Infilled Walls RC Frame Structure

In the dynamic and static analysis of structures, the accuracy of component elements and models will directly affect the analysis results. In order to select the appropriate uniaxial material and simplified model when establishing the simplified model of infilled wall reinforced concrete (RC) frame, OpenSees is used to compare and analyze its accuracy and applicability based on three uniaxial materials and four simplified models of infilled wall RC frame test. According to the comparison results, the infilled wall RC frame structure model is established, and the pushover method is used to analyze the overall seismic performance coefficient of the structure. The results show that the hysteretic material can accurately simulate the shape of the Hysteretic curve and peak bearing capacity; the single strut model can accurately simulate the peak bearing capacity, secant stiffness, and residual deformation of the infilled wall; the five strut model can accurately simulate the peak bearing capacity and initial stiffness of infilled wall; the full arrangement of infilled walls can increase the overall seismic performance coefficient of RC frame structure, and the absence of infilled walls on the ground floor will significantly reduce the overall seismic performance coefficient of the structure. Therefore, only the single strut model can be selected when studying the in-plane problems of the infilled wall. The layout of the infilled wall should be considered in the design to avoid the bottom weak layer affecting the safety of the whole structure.