超大跨度斜拉桥合理抗震结构体系研究

发布时间：2018-04-23 18:45

本文选题：超大跨度斜拉桥 + 抗震性能　；参考：《浙江工业大学学报》2017年02期

【摘要】：为研究超大跨度斜拉桥的抗震性能,以主跨1 400m的超大跨度斜拉桥设计方案为工程背景,采用多振型地震反应谱方法进行水平和竖向地震作用的结构反应分析,揭示超大跨度地震反应的特点,同时分析了主梁的高度和宽度、索塔结构型式、索塔高跨比、边中跨比、边跨辅助墩以及斜拉索锚固体系等设计参数对超大跨度斜拉桥地震反应的影响,探讨了其合理的抗震结构体系.结果表明:水平地震作用下桥塔和主梁的地震反应显著,桥塔的塔底截面和主梁在塔梁交接处截面的地震内力非常大,应特别重视这些截面的抗震设计;超大跨度斜拉桥当采用A型桥塔并降低其高度、短边跨并设置辅助墩以及斜拉索采用部分地锚方式时,结构地震反应小,抗震性能良好,是其合理的抗震结构体系.
[Abstract]:In order to study the seismic behavior of large span cable-stayed bridge, the structural response analysis of horizontal and vertical seismic action is carried out by using multi-mode seismic response spectrum method, taking the design scheme of large span cable-stayed bridge with main span of 1400m as the engineering background. At the same time, the height and width of the main beam, the structure type of the cable tower, the ratio of the height to span of the cable tower, the ratio of the side to the middle span are analyzed. The influence of design parameters such as side span auxiliary pier and cable anchoring system on seismic response of long-span cable-stayed bridge is discussed. The results show that the seismic response of the bridge tower and main beam is remarkable under the horizontal earthquake, and the seismic internal force of the tower bottom section and the main beam section at the junction of the tower and beam is very large, so special attention should be paid to the seismic design of these sections. When large span cable-stayed bridge adopts A type bridge tower and reduces its height, short side span and auxiliary pier and partial ground anchor are adopted, the seismic response of the structure is small and the seismic performance is good, so it is a reasonable aseismic structure system.
【作者单位】：浙江工业大学建筑工程学院;
【基金】：浙江省自然科学基金资助项目(LY15E080020)
【分类号】：U442.55;U448.27

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