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高墩大跨连续刚构桥抗震设计研究

发布时间:2018-06-24 06:47

  本文选题:高墩大跨连续刚构桥 + 地震反应 ; 参考:《哈尔滨工业大学》2015年硕士论文


【摘要】:高墩大跨连续刚构桥在我国西部山区的公路和铁路中运用得越来越多,但是公路和铁路桥梁抗震设计规范只是对于大跨桥梁笼统地给出了一些抗震设计建议。在实际设计高墩大跨连续刚构桥还是需对其进行专门的抗震设计,因此本文对高墩大跨连续刚构桥的抗震设计研究具有很大的应用价值。本文基于桥梁有限元分析软件Midas/Civil,对某高墩大跨连续刚构桥的高墩墩身设计开展了研究:基于截面分析法,采用M-φ曲线得到高墩墩身设计时拟出的双薄壁墩、单薄壁墩和组合墩的墩底截面的性能,对它们的延性性能进行了对比分析。分别对这三种墩身形式的高墩大跨连续刚构桥进行了在顺桥向和横桥向的多遇地震作用下的线性时程分析,在罕遇地震作用下的非线性时程分析,分别得出它们的动力反应情况,对比反应参数,得出动力反应最理想的墩身形式。采用粘滞阻尼器对高墩大跨连续刚构桥的纵向减震控制开展了研究,对比分析了滞阻尼系数和速度指数不同的16组粘滞阻尼器的减震效果,优选出减震效果最好的粘滞阻尼器。采用调谐质量阻尼器对高墩大跨连续刚构桥的横向减震控制进行了研究,对比分析9种不同质量的调谐质量阻尼器,得到了其中减震效果最好的调谐质量阻尼器。采用顺桥向不同的视波速的地震波研究了行波效应对高墩大跨连续刚构桥的动力响应的影响。
[Abstract]:Continuous rigid frame bridges with high piers and long spans are used more and more in highways and railways in the western mountainous areas of China, but the seismic design code for highway and railway bridges is only a general proposal for seismic design of long-span bridges. In the practical design of long-span continuous rigid frame bridge with high piers, it is still necessary to carry out a special seismic design, so this paper has great application value to the seismic design of long-span continuous rigid frame bridge with high pier. In this paper, based on the finite element analysis software Midas / Civil, the design of the pier of a long-span continuous rigid frame bridge with high piers is studied. Based on the section analysis method, the double thin-walled piers are obtained by using M- 蠁 curves. The ductility of single thin-walled pier and composite pier is compared and analyzed. The linear time-history analysis and nonlinear time-history analysis of these three types of long-span continuous rigid frame bridges with high piers and long spans are carried out under the frequent earthquake action in the direction of the bridge and the direction of the transverse bridge, respectively, and the nonlinear time-history analysis under the action of rare earthquakes. Their dynamic response was obtained respectively, and the optimal pier form of dynamic response was obtained by comparing the reaction parameters. The longitudinal damping control of long-span continuous rigid frame bridges with high piers and long spans is studied by using viscous dampers. The damping effects of 16 groups of viscous dampers with different hysteretic damping coefficients and velocity indices are compared and analyzed, and the best viscous dampers are selected. The control of lateral vibration absorption of long-span continuous rigid frame bridges with high piers is studied by using tuned mass dampers. Nine kinds of tuned mass dampers with different masses are compared and analyzed, and the tuned mass dampers with the best damping effect are obtained. The influence of traveling wave effect on the dynamic response of long-span continuous rigid frame bridge with high piers is studied by using seismic waves with different apparent wave velocities along the bridge.
【学位授予单位】:哈尔滨工业大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:U442.55;U448.23

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