桥梁板式橡胶支座与粘滞阻尼器组合使用的减震性能研究

在分析几种减隔震装置的减震耗能机理的基础上,提出了板式橡胶支座与粘滞阻尼器组合使用的减震措施,并利用非线性时程地震反应分析方法,对这种组合装置的减震性能进行了研究。为了研究阻尼系数、阻尼指数和周期对减隔震桥梁地震反应的影响,作了大量的参数分析,给出了参数的合理取值范围。研究结果表明,组合使用板式橡胶支座和粘滞阻尼器,既能减小结构地震力,又能有效地控制梁体位移及墩、梁相对位移。

Study on Aseismic Performance of Combination of Laminated Rubber Bearing and Viscous Damper for Bridge

The aseismic performance of the combination of laminated rubber bearing and viscous damper for bridge was studied with a nonlinear timehistory analysis method.The composite device is on the basis of aseismic principles of base isolation, such as flexibility and energy dissipation.To investigate the effect of the parameters on the seismic response of structures, a large number of parameter analyses were carried out on the damping coefficient, damping exponent and period.Appropriate ranges of parameters for seismic design were suggested.The results show that the composite device is very effective for reducing seismic forces and for controlling the magnitude of displacements of deck or relative displacements between superstructure and piers.