变高墩曲线连续梁桥减隔震分析

以一项实际工程为背景,取其中一联变高墩曲线连续梁桥作为研究对象.该桥曲率半径250 m,最大墩高40m.采用SAP2000非线性模态时程分析方法（FNA）,分别分析了原结构、带铅芯橡胶支座的结构、带粘滞阻尼器的结构、两种混合减隔的结构等5种工况.对比了5种工况的分析结果,这些结果包括梁体位移、墩顶位移、墩底反力.分析结果表明,采用布置适当的铅芯橡胶支座加粘滞阻尼器的混合减隔震方法,其减震效果比单纯使用铅芯橡胶支座或是单纯使用粘滞阻尼器更好.

Seismic mitigation and isolation analysis of continuous curved beam bridge with different height piers

The model of this article is from a real project, but it is only a part of the whole bridge. It is a continuous curved beam bridge whose radius is 250 meters. This part in the article has different piers and the highest pier is 40 meters. The analysis program of this article is SAP2000 FNA （non-linear modal time history analysis）. There are five cases which include original structure,structure with lead-rubber bearing,structure with viscous fluid damper,and two combined isolations of lead-rubber bearing and viscous fluid damper. The results of these analyses show that the combined isolation whose lead-rubber bearings and viscous fluid dampers are properly paced is the best way for this kind of curved bridge.