T形钢制耗能铰阻尼器抗震性能及力学模型研究

Study on seismic performance and mechanical model of T-shaped steel energy dissipation hinged damper

为了提高装配式框架结构的抗震性能,提出了不同类型的钢制耗能铰阻尼器,即将预制梁、柱用钢制铰进行连接,在铰的上、下或两侧安装软钢耗能元件。对几种耗能铰阻尼器的构造形式、抗震性能进行总结,选取一种构造简单、抗震性能较好的T形耗能铰阻尼器进行抗震性能和力学模型研究。采用ABAQUS软件对T形耗能铰阻尼器的试验进行数值模拟,在此基础上建立了24个有限元模型对T形耗能元件的翼缘削弱程度和T形截面尺寸进行参数分析,并对不同影响因素进行量化得到耗能铰阻尼器的骨架曲线计算公式,最后,对公式的正确性进行了验证。结果表明,该T形耗能铰阻尼器具有良好的承载力、延性和耗能能力,所提出的骨架曲线准确率较高,可为该类阻尼器的设计提供参考。

In order to improve the seismic performance of prefabricated frame structures,different types of steel energy dissipation hinged dampers have been proposed that the prefabricated beams and columns are connected with steel hinges and the mild steel energy-dissipating elements are installed on the upper,lower or both sides of the hinges.The structural forms and seismic performance of several energy-dissipated hinged dampers were summarized,and a T-shaped energy-dissipated hinged damper with simple structure and good seismic performance was selected to study the seismic performance and mechanical model.ABAQUS software was used to simulate the test of T-shaped damper,on this basis,24 finite element models were established to analyze the flange weakening degree and T-shaped section size of the T-shaped energy dissipation element,the different influencing factors were quantified to obtain the skeleton curve calculation formula of the energy dissipation hinged damper,finally,the correctness of the formula was verified.The results show that the T-shaped energy dissipation hinged damper has good bearing capacity,ductility and energy dissipation capacity.The proposed skeleton curve has high accuracy,and can provide reference for the design of this kind of damper.