钢—混组合箱梁剪力滞及减隔震支座研究

发布时间：2018-04-26 13:38

本文选题：组合梁 + 减隔震装置　；参考：《重庆交通大学》2015年硕士论文

【摘要】：随着交通运输业的发展,桥梁得到了很大的发展。地震对桥梁的破坏将直接导致公路的瘫痪,这个问题随着桥梁在公路中所占比例的增加,越来越凸显出来。桥梁减震隔震设计理念已经越来越受到重视。铅芯橡胶减隔震支座和高阻尼橡胶减隔震支座由于其具工作性能稳定,能够较强的消耗地震能及增加结构延性,减震效果较为显著,且其施工较为方便,在工程实践中运用较为广泛。本文主要介绍铅芯橡胶减隔震支座和高阻尼橡胶减隔震,介绍了两种减隔震支座的受力性能和减震原理。本文以港珠澳大桥CB05标浅水区非通航孔桥为工程背景,采用Midas/civil建立有限元三维模型,研究两种支座在地震作用下的动力响应。分析比较了这两种减隔震支座与普通叠层橡胶支座在的地震作用下的动力响应,包括结构的自振周期、结构的最大加速度、结构的最大位移和墩底反力的比较；分析了铅芯支座、高阻尼橡胶支座和普通橡胶支座在不同墩高作用下的地震结构响应；研究了阻尼比最间隔着支座的影响,得到了铅芯橡胶支座和高阻尼橡胶支座对于阻尼比变化的线性拟合曲线。剪力滞效应自从被发现至今,一直是科研工作者热衷于研究的领域。本文介绍了分析剪力滞的几种常用解析法,结合减隔震部分工程背景,采用Midas/FEA建立有限元模型。分析了钢-混凝土组合连续梁桥在施工过程中,在自重作用下,桥面板未组合长度对桥面板剪力滞效应的影响；分析了预应力在恒载作用时对两跨连续组合梁的剪力滞效应影响；研究了在车辆荷载作用下,不同偏心率对结构桥面板剪力滞效应的影响。
[Abstract]:With the development of the transportation industry , the bridge has been greatly developed . The damage of bridges will directly result in the paralysis of the highway . This problem is becoming more and more important as the proportion of the bridge in the highway is increased .
The seismic structural responses of the lead - core support , the high - damping rubber support and the ordinary rubber support under different heights are analyzed .
In this paper , the influence of damping ratio on damping ratio is studied . The linear fitting curve for damping ratio change is obtained . The shear lag effect has been the research field since it has been discovered .
The effect of prestress on shear lag effect of two - span continuous composite beam is analyzed .
The effect of different eccentricity on shear lag effect of bridge deck is studied under the influence of vehicle load .

【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441.3;U443.36

【参考文献】