非线性粘滞阻尼器对悬索桥地震反应的影响

通过对粘滞阻尼器的力学特性进行分析,提出了在塔、梁连接处设置非线性粘滞阻尼器来控制塔、梁相对位移的减震措施。在对大跨度悬索桥动力特性分析的基础上,结合单自由度系统的震反应,提出了一种分析塔、梁相对位移的简化方法,并给出了非线性粘滞阻尼器参数设计的简便流程。利用非线性时程地震反应分析方法对一座带有非线性粘滞阻尼器的大跨度悬索桥进行了分析和研究,研究结果表明在塔、梁连接处设置非线性粘滞阻尼器可以在不增加塔底内力情况下,显著地减小塔、梁相对位移。

Influence of Nonlinear Viscous Damper on Earthquake Response of Suspension Bridge

Through the analysis of the mechanics characteristics of viscous damper the paper puts forward the measure for lowering the earthquake, i.e. at the connection place of pylon and beam there is a nonlinear viscous for controlling the responding placement of pylon and beam. On the basis of analyzing the dynamic characteristics of long-span suspension bridge and in combination with the earthquake response of single freedom degree system, the paper puts forward a simplified approach for analyzing the relative placement of pylon and beam and gives the simple and easy process for nonlinear viscous damper parameter design. It analyzes and studies on a long-span suspension bridge with nonlinear viscous damper by the analysis method of nonlinear last earthquake response. The study result shows that if installing nonlinear viscous damper at the connection place of pylon and beam, it could obviously reduce the relative replacement of pylon and beam under no increasing the internal force of pylon bottom.