高位转换耗能减振结构静力弹塑性分析

确定结构等效阻尼比是对高位转换耗能减振结构进行静力弹塑性分析时的关键问题.结合通用分析软件SAP2000/ETABS,对结构中加入的位移相关型耗能减振装置的力学模型(Bouc-Wen模型)进行分析,给出耗能减振装置采用该模型模拟时的能量计算公式.在此基础上,结合耗能减振结构的现有研究成果,推导出位移相关型耗能减振装置采用Bouc-Wen模型模拟时结构等效阻尼比计算公式.最后,对某高位转换耗能减振结构算例进行静力弹塑性分析,分析结果表明:计算高位转换耗能减振结构的等效阻尼比是可行的,采用高位转换耗能减振结构体系能很好的改善原高位转换结构的抗震性能.

Static elastic-plastic analysis for the structural system of high-level transfer stories with energy dissipation devices

The key issue of equivalent damping ratio for the system of high-level transfer story with energy dissipation devices in the process of statically elastic-plastic analysis is studied. Using a mechanical model(Bouc-Wen model)of the displacement-dependent energy dissipation devices are analyzed by using SAP2000/ETABS, and an energy formula for the devices simulated with the Bouc-wen model is presented. Based on relevant research results, a calculation formula of equivalent damping ratio for the system of high-level transfer story with energy dissipation devices is derived. An example structure is studied utilizing the above method, and the results indicate that the proposed formula is valid, and the structural seismic behavior could be obviously improved via adoption of the system.