波形腹板钢-混组合箱梁畸变效应分析  

Analysis of Distortion Effect of Corrugated Web Steel-concrete Composite Box Girder

作　　者：岳阳 杨黎明 康健 李峰 YUE Yang;YANG Liming;KANG Jian;LI Feng(Gansu Wuhuan Highway Engineering Co.,Ltd.,Lanzhou 730050,China;Gansu Bridge Engineering Research Center,Lanzhou 730050,China)

机构地区：[1]甘肃五环公路工程有限公司,兰州730050 [2]甘肃省桥梁工程研究中心,兰州730050

出　　处：《交通科技》2024年第1期51-56,共6页Transportation Science & Technology

基　　金：甘肃省交通运输厅揭榜挂帅制科研项目(202102)资助。

摘　　要：为研究波形腹板钢-混组合箱梁畸变效应,以桑园子黄河大桥引桥简支箱梁为研究对象,将畸变角重新定义,通过计算畸变中心、畸变总势能,确定初始参数,利用势能驻值原理推导与传统扭转分析理论相一致的畸变效应分析方法。根据工程实例,对车道荷载下波形腹板钢-混组合箱梁畸变翘曲应力变化规律进行研究。结果表明,畸变翘曲应力在组合箱梁应力中占比不容忽视,且随着箱梁顶板混凝土厚度增大,翘曲正应力逐渐减小,在钢底板组合箱梁增设铺底混凝土可有效减少畸变翘曲应力。In order to study the distortion effect of corrugated web steel-concrete composite box girder,the simply supported box girder of the approach bridge of Sangyuanzi Yellow River Bridge is taken as the research object,the distortion angle is redefined,the initial parameters are determined by calculating the distortion center and total distortion potential energy,and the distortion effect analysis method consistent with the traditional torsion analysis theory is derived by using the principle of potential energy standing value.According to the engineering example,the variation law of distortion and warping stress of corrugated web steel-concrete composite box girder under lane load is studied.The research results show that the distortion warping stress accounts for a large proportion of the stress of composite box girder,and the warping normal stress gradually decreases with the increase of the concrete thickness of the box girder top plate.Adding the bottom concrete to the composite box girder with steel floor can effectively reduce the distortion warping stress.

关 键 词：波形腹板钢-混组合箱梁 畸变效应 畸变翘曲应力 铺底混凝土 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]