鄂东大桥施工参数敏感性分析  

Analysis of Sensibility of Construction Parameters of East Hubei Yangtze River Bridge

作　　者：黄国平[1] 翁方文[2] 

机构地区：[1]湖南城市学院土木工程学院,湖南益阳413000 [2]中交第二航务工程局有限公司技术中心长大桥梁建设施工技术交通行业重点实验室,武汉430040

出　　处：《湖南城市学院学报（自然科学版）》2012年第2期6-9,共4页Journal of Hunan City University:Natural Science

摘　　要：以鄂东长江大桥主桥(双塔混合梁斜拉桥)为工程背景,基于有限元分析理论,运用有限元软件NLABS建立有限元模型,分析主梁自重、拉索线密度、拉索弹模、主梁弹性模量、混凝土主塔弹性模量和索梁温差等多个参数对结构内力、线形的影响及其变化规律,目的在于掌握参数变化时成桥结构内力及线形的变化范围是否危及结构安全.计算结果表明,拉索弹模、索梁温差、钢箱梁梁段重量对结构内力和线形影响显著,其他因素次之.Taking the East Hubei Yangtze River Bridge （hybrid girder cable-stayed bridge with two towers） as the project background, the influence of multiple parameters such as weight of main beam, thread density of cable, the elastic modulus of cable that of main beam, that of concrete main tower, and difference temperature of cable and beam on the internal force and contour of the structure was analyzed and the variation pattern of these parameters were analyzed in order to find whether the variation range of the internal force and contour of the construction endanger and the safety of the construction. It was shown by the computation result that the elastic modulus of cable, the difference temperature of cable and beam and weight of main beam had more remarkable influence on the internal force and contour of the structure than other factors.

关 键 词：混合梁斜拉桥 敏感性分析 结构参数 几何控制法 

分 类 号：U445[建筑科学—桥梁与隧道工程]