半漂浮体系斜拉桥动力特性及减震研究

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【摘    要】:为研究半漂浮体系斜拉桥的动力特性,对成桥状态半漂浮体系斜拉桥进行地震响应分析,研究表明:半漂浮体系斜拉桥基本模态为纵漂,在地震作用下梁端和塔顶均会产生较大纵桥向位移,采用金属阻尼器可显著降低其塔顶和梁端顺桥向位移响应。

【关键词】:半漂浮体系;斜拉桥;动力特性;减震

【中图分类号】:U448.27 【文献标志码】:A 【文章编号】:1008-3197(2024)02-33-03

【DOI编码】:10.3969/j.issn.1008-3197.2024.02.009

Research on Dynamic Characteristics and Seismic Energy Dissipation of

Semi-floating Cable-Stayed Bridges

YANG Honglei

(Tianjin Metro Group Co. Ltd.,Tianjin 300011,China)

【Abstract】:In order to study dynamic characteristics of a semi floating cable-stayed bridge, the paper studies itsseismic response. The study showed that the basic mode of the semi floating cable-stayed bridge is longitudinal floating, and under seismic action, there will be significant longitudinal displacement at the beam end and tower top. The use of metal dampers can significantly reduce the displacement response of the tower top and beam end along the bridge direction.

【Key words】:semi-floatingsystem;cable-stayed bridge; dynamic characteristics; seismic reduction

斜拉桥具有造型美观、跨度大、受力传递路径明确、便于悬臂施工等诸多优点[1~3];根据塔墩梁连接方式的不同,可划分为全漂浮体系斜拉桥、塔梁固结塔墩分离体系斜拉桥、塔墩梁固结体系斜拉桥及半漂浮体系斜拉桥[4]。(剩余2487字)

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