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大跨度公铁两用斜拉桥列车制动力作用下结构响应研究
Responses of Long-span Highway and Railway Cable-stayed Bridge Induced by Train Braking Forces
【摘要】 以某一正在设计的大跨度公铁两用斜拉桥为背景,利用非线性动力时程分析方法,分析了塔梁间设置黏滞阻尼器时,在列车制动力作用下结构动力响应,并与未设置黏滞阻尼器情况下的结构响应进行比较。分析结果表明,在塔梁间设置黏滞阻尼器能有效地降低在列车制动力作用下梁端及塔梁相对位移,结构受力也有所改善。
【Abstract】 Based on a highway and railway cable-stayed bridge under design,dynamic responses of the structure were analyzed under train braking forces by the nonlinear dynamic time-history analysis method. Viscous dampers were installed between the tower and girders for this bridge. Results were compared for models with viscous dampers and without viscous dampers. It is indicated that the displacements on the beam end and relative displacements between tower and beam were reduced effectively by installing dampers between tower and beam.
【关键词】 公铁两用斜拉桥;
非线性;
动力时程分析方法;
黏滞阻尼器;
列车制动力;
【Key words】 highway and railway cable-stayed bridge; nonlinear; dynamic time-history analysis method; viscous damper; train braking force;
【Key words】 highway and railway cable-stayed bridge; nonlinear; dynamic time-history analysis method; viscous damper; train braking force;
【基金】 973计划(2013CB036302)
- 【文献出处】 结构工程师 ,Structural Engineers , 编辑部邮箱 ,2014年06期
- 【分类号】U441.3;U448.27
- 【被引频次】2
- 【下载频次】72