宽幅混合梁斜拉桥钢-混结合段温度效应研究  

Research on Thermal Effect of Steel-concrete Bonding Section of Cable-stayed Bridge with Wide Hybrid Beam

作　　者：陈雨薇 陈建兵[1] 周晨 翟慕赛 CHEN Yuwei;CHEN Jianbing;ZHOU Chen;ZHAI Musai(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China;No.2 Engineering Ltd of FHEC,CCCC,Suzhou 215011,China)

机构地区：[1]苏州科技大学土木工程学院,苏州215011 [2]中交一公局第二工程有限公司,苏州215011

出　　处：《武汉理工大学学报（交通科学与工程版）》2024年第5期969-973,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金(51908395)。

摘　　要：文中基于热传导理论和ABAQUS有限元数值模拟,分析了日照非均匀温度作用下宽幅混合梁斜拉桥钢-混结合段温差以及温度应力分布特征.结果表明:钢-混结合段温度传递具有一定的滞后性,顶板升温和降温幅度明显高于底板;钢梁过渡段横向温差在悬臂处较为明显,最大变化幅4.6℃;横隔板竖向存在明显的温度梯度,在18时钢箱梁过渡段产生最大竖向温差,约为14℃;结合段在温度作用下,钢梁总体受压,局部受拉,拉应力集中在锚固腹板处,混凝土梁整体受拉,局部受压,压应力集中在悬臂段中部.Based on heat conduction theory and ABAQUS finite element numerical simulation,the temperature difference and temperature stress distribution characteristics of steel-concrete joint section of wide mixed beam cable-stayed bridge under the action of sunshine non-uniform temperature were analyzed.The results show that the temperature transfer in the steel-concrete joint has a certain lag,and the temperature rise and fall of the top plate is obviously higher than that of the bottom plate.The transverse temperature difference in the transition section of steel beam is obvious at the cantilever,and the maximum variation range is 4.6℃.There is an obvious temperature gradient in the vertical direction of the diaphragm,and the maximum vertical temperature difference is about 14℃at 18 o’clock in the transition section of the steel box girder.Under the action of temperature,the steel beam is generally compressed and partially tensioned,and the tensile stress is concentrated at the anchorage web,while the concrete beam is generally tensioned and partially compressed,and the compressive stress is concentrated in the middle of the cantilever section.

关 键 词：斜拉桥 宽幅混合梁 钢-混结合段 温度场 温度梯度 

分 类 号：U448.38[建筑科学—桥梁与隧道工程]