摘要
文中以某矮塔斜拉桥为例,基于参数敏感性分析,针对矮塔斜拉桥的结构特点,选取相应的控制参数,建立单参数与双参数敏感性分析的有限元模型.对桥梁的成桥线形进行单参数敏感性分析,并且针对矮塔斜拉桥首次利用双参数敏感性分析的方法,对桥梁的控制参数进行的综合的敏感性分析.结果表明:对于成桥线形而言,主梁容重、索力、预应力、温度为主要敏感性参数,弹模与收缩徐变为次要敏感性参数,其中容重的影响最大.在施工控制参数中,弹模与容重、索力与弹模存在一定的组合效应,两者同时发生变化会对成桥线形产生更大的影响.
Taking a low-pylon cable-stayed bridge as an example,based on the principle of parameter sensitivity analysis,the corresponding control parameters were selected according to the structural characteristics of low-pylon cable-stayed bridge,and the finite element models of single-parameter and double-parameter sensitivity analysis were established.The single-parameter sensitivity analysis of the completed bridge alignment was carried out,and the comprehensive sensitivity analysis of the control parameters of the bridge was carried out by using the method of double-parameter sensitivity analysis for the low-pylon cable-stayed bridge for the first time.The results show that bulk density,cable force,prestress and temperature are the main sensitive parameters,while elastic modulus and shrinkage creep are the secondary sensitive parameters,among which bulk density has the greatest influence.Among the construction control parameters,elastic modulus and bulk density,cable force and elastic modulus have certain combined effects,and the simultaneous change of them will have a greater impact on the completed bridge alignment.
作者
随嘉乐
张谢东
张光英
SUI Jiale;ZHANG Xiedong;ZHANG Guangying(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China;CCCC First Highway Engineering Co.Ltd.,Beijing 100024,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2023年第3期499-504,共6页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
关键词
矮塔斜拉桥
敏感性分析
单参数
双参数
组合效应
extradosed bridge
sensitivity analysis
single-parameter
dual-parameter
associated effect
作者简介
第一作者:随嘉乐(1996-),男,硕士生,主要研究领域为桥梁结构分析与施工监控;通信作者:张谢东(1964-),男,博士,教授,主要研究领域为结构力学、桥梁结构分析与施工控制和桥梁结构健康监测。
