大跨度斜拉桥纵桥向阻尼器减震措施研究

以某座大跨度斜拉桥为研究背景,采用非线性时程分析方法,对在主塔与主梁之间设置纵向阻尼器的减震措施进行研究,分析不同阻尼器参数对结构地震响应的影响规律,确定了一组较合适的阻尼器参数.研究结果表明:设置纵向阻尼器可有效减小大跨度斜拉桥的地震响应,阻尼器参数的选择需综合考虑结构主要构件的内力与位移地震响应变化规律,根据优化目标,进行参数优化分析,以达到理想的减震效果.

Research on longitudinal seismic releasing measure of long-span cable-stayed bridge with dampers

Based on a long-span cable-stayed bridge, the non-linear dynamic time-history analysis method is used to research on the longitudinal seismic releasing measure of dampers which are between tower and girder. And the seismic analysis of different damper parameters has also been done to find a suitable set of damping parameters. The results show that longitudinal damper can effectively reduce the seismic response of long-span cable-stayed bridge. The damping parameters need to consider the variation of force and displacement of the main components under earthquake action. And based on the optimization objective, it needs to do parameter optimization analysis in order to achieve the desired damping effect.