【摘要】 本文以香溪河大桥为工程背景,利用大型有限元软件ANSYS建立该斜拉桥的有限元模型,进行地震作用下的动力非线性时程分析,并以COMBIN37单元模拟非线性粘滞阻尼器,研究了粘滞阻尼器参数对桥梁抗震性能的影响规律,并确定了合理的阻尼器参数取值。并对未设置与设置粘滞阻尼器的桥梁结构地震响应进行数值分析与比较,分析结果表明:合理设置粘滞阻尼器,可以有效降低桥梁结构关键部位在地震作用下的位移响应,并对结构内力也有一定的降低。本文研究结果为大跨度斜拉桥振动控制分析及工程应用具有重要的指导意义。更多还原

【Abstract】 Based on the Xiangxi river bridge,the finite element model of the bridge is established by using the finite element software ANSYS,and the nonlinear dynamic performance is performed on the basis of the time-history analysis. The nonlinear viscous damper is simulated with the COMBIN37 element to study the effect of the damper on the seismic performance of the bridge. The influence of damper parameters on the structural response is discussed,and reasonable parameters are determined. Comparing the dynamic responses of the bridge without the viscous dampers and those with the installation of the viscous dampers,the analysis results show that the reasonable installation of the viscous dampers can effectively reduce the displacement response of the key parts of the structure under the earthquake excitation and also improve the internal forces of the structure.更多还原