Numerical investigation of temperature gradient-induced thermal stress for steel–concrete composite bridge deck in suspension bridges  

悬索桥钢–混组合桥面系温度梯度数值模拟及效应研究（英文）

作　　者：WANG Da DENG Yang LIU Yong-ming LIU Yang 王达;邓扬;刘永明;刘扬

机构地区：[1]School of Civil Engineering, Changsha University of Science & Technology, Changsha 410114, China [2]Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China [3]School for Engineering of Matter, Transport & Energy, Arizona State University, 501 E. Tyler Mall, AZ 85281, USA

出　　处：《Journal of Central South University》2018年第1期185-195,共11页中南大学学报（英文版）

基　　金：Project(2015CB057701)supported by the National Basic Research Program of China;Project(51308071)supported by the National Natural Science Foundation of China;Project(13JJ4057)supported by Natural Science Foundation of Hunan Province,China;Project(201408430155)supported by the Foundation of China Scholarship Council;Project(2015319825120)supported by the Traffic Department of Applied Basic Research,China;Project(12K076)supported by the Open Foundation of Innovation Platform in Hunan Provincial Universities,China

摘　　要：A3D finite element model(FEM)with realistic field measurements of temperature distributions is proposed to investigate the thermal stress variation in the steel–concrete composite bridge deck system.First,a brief literaturereview indicates that traditional thermal stress calculation in suspension bridges is based on the2D plane structure with simplified temperature profiles on bridges.Thus,a3D FEM is proposed for accurate stress analysis.The focus is on the incorporation of full field arbitrary temperature profile for the stress analysis.Following this,the effect of realistic temperature distribution on the structure is investigated in detail and an example using field measurements of Aizhai Bridge is integrated with the proposed3D FEM model.Parametric studies are used to illustrate the effect of different parameters on the thermal stress distribution in the bridge structure.Next,the discussion and comparison of the proposed methodology and simplified calculation method in the standard is given.The calculation difference and their potential impact on the structure are shown in detail.Finally,some conclusions and recommendations for future bridge analysis and design are given based on the proposed study.对钢–混组合结构温度梯度效应的研究,主要是以竖向温度梯度结合二维有限元模型开展的;而对大跨度桥梁实测温度梯度的研究发现,其具有典型的空间特性。鉴于此,以矮寨大桥为研究背景,对大跨度悬索桥钢–混组合桥面系的周年实测空间温度梯度进行实测研究,建立大跨度悬索桥钢–混组合桥面系的空间有限元节段模型,研究在空间温度梯度耦合作用下,桥面系结构参数与力学响应之间的关系,得出的结论可为同类结构的建养提供有益的参考。

关 键 词：suspension bridge steel–concrete composite bridge deck vertical temperature gradient finite element method thermal stress 

分 类 号：U441.5[建筑科学—桥梁与隧道工程] U448.25[交通运输工程—道路与铁道工程]