装配式RC框架黏滞阻尼器凸轮式响应放大#br# 消能体系的地震易损性分析

针对装配整体式结构抗震性能的不足及现有响应放大装置在罕震和极罕遇地震下容易失效的缺点，提出一种新型限位响应放大装置(凸轮式响应放大装置)。通过ABAQUS有限元软件进行凸轮式响应放大装置子单元的二次开发，进而对装配整体式框架结构实体模型进行动力时程分析。选取层间位移角为结构损伤指标，用动力增量法分别对未添加凸轮式响应放大装置的无控结构和添加后的减震结构进行地震易损性分析。结果表明：相对于无控结构，加设凸轮式响应放大装置的减震结构达到各级破坏状态的超越概率显著下降，抗震性能得到有效提高；凸轮式响应放大装置在各级地震作用下均有优良的减震效果，能有效降低结构的损伤程度；通过对易损性曲线的分析，可为装配整体式结构基于性态的设计方法提供依据。

Seismic fragility analysis of the energy-dissipative prefabricated concrete frame #br# structure with a new cam-type response amplification device of viscous damper

A new type of response amplification device (cam-type response amplification device) had been proposed to solve the two following problems: the seismic performances of the prefabricated concrete structures are not as good as the cast-in-situ concrete structures, and the existing response amplification devices are prone to failure under the action of rare earthquakes. The secondary development of the sub-unit of the cam-type response amplification device was carried out by using ABAQUS finite element software, and then the dynamic time history analysis was performed on the prefabricated concrete structures. The story drift ratio was selected as the structural damage index, and the incremental dynamic analysis method was used to analyze the seismic fragility of the uncontrolled structures and the energy-dissipative structures after adding the devices. The results show that compared with the uncontrolled structures, the exceedance probabilities of structures with cam-type response amplification devices have been significantly reduced in different failure states, and structural seismic performances have been effectively improved. The cam-type response amplification device has excellent energy-dissipative benefit under the action of various earthquakes, which can effectively reduce the damage degree of the structures. Through the analysis of the fragility curves, a basis for the design methods of prefabricated concrete structures based on the performances can be provided.