摘要
采用钢混主梁的大跨度斜拉桥近年来不断发展。安徽省望东长江大桥主桥采用PK型分离式组合梁斜拉桥,主跨跨径638 m,是目前国内已建成的最大跨度组合梁斜拉桥。研究以望东长江大桥为对象,采用数值分析方法,分别对大跨径组合梁斜拉桥的弹性稳定和弹塑性极限承载能力进行研究,分析了施工和运营两个阶段的典型工况,明确了不同工况下大跨组合梁斜拉桥的承载能力和破坏模式,并通过考虑几何非线性和材料非线性的弹塑性有限元分析,明确了大跨组合梁斜拉桥在极限状态下的安全控制构件、失效路径。研究成果可为同类工程提供参考。
In recent years,the long-span cable-stayed bridge with composite beam has been developing continuously.The main bridge of Wangdong Yangtze River Bridge in Anhui Province is a PK type composite beam cable-stayed bridge with a main span of 638 m,which is the largest span composite beam cable-stayed bridge in China.Taking Wangdong Yangtze River Bridge as the research object,the elastic stability and elastic-plastic ultimate bearing capacity of super long-span composite beam cable-stayed bridge are studied by numerical analysis method.The typical conditions during construction and operation stages are analyzed.The bearing capacity and failure modes of long-span composite beam cable-stayed bridge under different conditions are studied based on the elastic-plastic finite element analysis considering geometric nonlinearity and material nonlinearity property.The key components and failure paths of the long-span composite beam cable-stayed bridge in the limit state are identified.The research results can provide reference for similar projects.
作者
易岳林
陈政
王雨阳
周子杰
YI Yuelin;CHEN Zheng;WANG Yuyang;ZHOU Zijie(Anhui Transportation Holding Group Co.,Ltd.,Hefei 230000,China;Tongji University,Shanghai 200092,China)
出处
《结构工程师》
2021年第4期40-47,共8页
Structural Engineers
关键词
组合梁
斜拉桥
稳定
承载能力
数值分析
非线性
composite beam
cable-stayed bridge
stability
ultimate capacity
numerical analysis
nonlinearity
