静风荷载下的大跨度斜拉桥稳定性分析

英文篇名：Stability analysis of long-span cable-stayed bridge under static wind load
中文刊名：合肥工业大学学报(自然科学版)
英文刊名：Journal of Hefei University of Technology(Natural Science)
作者：康小方 ; 方诗圣 ; 张利 ; 方飞
英文作者：KANG Xiao-fang1 ; FANG Shi-sheng1 ; ZHANG Li2 ; FANG Fei1(1.School of Civil and Hydraulic Engineering ; Hefei University of Technology ; Hefei 230009 ; China ; 2.China Railway Hefei Institute of Architectural and Municipal Engineering Design Co. ; Ltd. ; Hefei 230041 ; China)
中文关键词：大跨度斜拉桥 ; 非线性 ; 静风稳定 ; 抗风性能
英文关键词：long-span cable-stayed bridge ; nonlinearity ; aerostatic stability ; wind resistance
出版日期：2012-05-28
机构：合肥工业大学土木与水利工程学院;中铁合肥建筑市政工程设计研究院有限公司;
年：2012
期：05
出版单位：合肥工业大学学报(自然科学版)

摘要

由于风荷载对斜拉桥的作用比较敏感,尤其是对于柔性大跨度斜拉桥。文章基于伯努利方程推导整个断面的3方向静风荷载原理,并采用内外增量双重迭代以及发散机理的数学描述给出静风稳定性计算过程;结合斜拉桥本身特性,分析了某跨江大跨度斜拉桥的横桥向风荷载和竖桥向风荷载的影响;使用大型有限元软件MIDAS/Civil建立桥梁模型,并进行成桥状态静风荷载下的特性分析,据此来评估该桥的静力抗风性能,为相关桥梁的抗风性能分析与设计提供依据。
The cable-stayed bridge is sensitive to the wind load,especially the flexible long-span cable-stayed bridge.The principle of three directional static wind load of the whole section is derived from Bernoulli equation.By applying the internal and external increment of double iterative and the mathematical description of divergent mechanism,the calculation process of aerostatic stability is obtained.The impact of the wind road in longitudinal and transverse direction on a long-span cable-stayed bridge over a river is analyzed on the basis of the characteristics of cable-stayed bridges.The FE software MIDAS/Civil is adopted to establish the bridge model and to analyze the bridge features under static wind load in finished bridge state.On this basis,the static wind-resistant behavior of the bridge is assessed.The analysis and design of wind-resistant behavior of relevant bridges can benefit from this example.

引文

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