斜拉-悬吊协作体系桥地震反应分析

发布时间：2019-06-19 07:51

【摘要】：为研究斜拉-悬吊协作体系桥的抗震性能,以一座主跨1 400m的斜拉-悬吊协作体系桥方案为背景进行分析。采用MIDAS Civil建立桥梁三维有限元模型,采用地震反应谱和时程分析方法进行水平和竖向地震作用下结构的地震反应分析以及结构非线性对地震反应的影响分析,并通过与相同主跨悬索桥和斜拉桥方案地震反应的对比,探讨斜拉-悬吊协作体系桥在超大跨度桥梁中的适用性。结果表明:在水平地震作用下,斜拉-悬吊协作体系桥塔、梁结合处的主梁和塔柱以及塔底截面产生最大内力,应重视这些关键截面的抗震设计;斜拉-悬吊协作体系桥的抗震性能介于斜拉桥与悬索桥之间,更偏向于悬索桥,比斜拉桥优越,适用于主跨超千米的大跨度桥梁。
[Abstract]:In order to study the seismic performance of the cable-stayed suspension cooperative system bridge, a cable-stayed suspension cooperative system bridge with a main span of 1 400m is used as the background to analyze the seismic performance of the cable-stayed suspension cooperative system bridge. The three-dimensional finite element model of the bridge is established by MIDAS Civil, and the seismic response analysis of the structure under horizontal and vertical earthquake and the influence of structural nonlinear on seismic response are carried out by using seismic response spectrum and time history analysis methods. The applicability of cable-stayed suspension cooperative system bridge in super-span bridge is discussed by comparing with the seismic response of the same main span suspension bridge and cable-stayed bridge scheme. The results show that under the action of horizontal earthquake, the cable-stayed suspension cooperative system bridge tower, the main beam and tower column at the beam joint and the bottom section of the tower produce the maximum internal force, and the seismic design of these key sections should be paid attention to, and the seismic performance of the cable-stayed suspension cooperative system bridge is between the cable-stayed bridge and the suspension bridge, which is superior to the cable-stayed bridge and is suitable for the long-span bridge with the main span of more than kilometer.
【作者单位】：浙江工业大学建筑工程学院;
【分类号】：U442.55

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