摘要
为研究矮塔斜拉桥纵桥向地震响应规律,基于某塔梁固结、塔墩分离四塔五跨矮塔斜拉桥分析了设置一个固定墩、设置两个固结墩和设置四个固结墩三种约束形式矮塔斜拉桥振型质量参与系数的分布规律及典型地震响应的变化规律。同时研究了全桥仅设置一个固定墩工况下不考虑活动球钢支座摩擦、考虑活动球钢支座摩擦及全桥各墩均设置双曲面球型减隔震支座三种工况下矮塔斜拉桥地震响应特点。
Based on one four-tower five-span extra-dosed cable-stayed bridge which is pylon-girderconsolidated and pylon-pier separated to research the distributionof model participating mass ratios and the changes of typical seismic responsesin three differentlongitudinal restraint systems between tower and girder including setting one fixed pier, two fixed piers and four fixed piers separately. Then study the seismic response characteristics of extra- dosed cable-stayed bridge in three cases which include ignoring the friction of active spherical steel bearings,considering the friction of active spherical steel when setting one fixed pier and setting double aseismic bearings between girder and piers.
关键词
矮塔斜拉桥
动力特性
抗震性能
双曲面球型支座
extra-dosed cable-stayed bridges
characteristic
seismic performance
double aseismic bearing bearings spherical dynamic spherical
