轮载下的波形钢腹板箱梁顶板横向内力分析  

Analysis of Transverse Internal Force in Deck of Box Girder with Corrugated Steel Webs under Wheel Load

作　　者：赵品[1] 叶见曙[1] 

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《公路交通科技》2013年第10期44-48,79,共6页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51078078);交通运输部西部交通建设科技项目(200831822367)

摘　　要：对于车辆荷载作用下波形钢腹板箱梁桥面板的横向内力计算，首先将轮载转换为沿桥跨分布的半波正弦荷载，然后将此连续荷载代入到适用于波形钢腹板箱梁的框架分析法模型中，即可求解相应位置处的横向内力值。为了验证此种荷载转换方式的准确性，将计算模型的理论计算值与试验实测值、有限元结果进行了对比分析，分析结果表明：这种通过荷载形式转换后计算得到的理论计算值与实测值、有限元值相比，差值均在10％以内，满足精度要求。进一步对计算模型在多种加载工况下的计算结果进行数值分析验证，包括不同加载位置，不同数量的集中轮载作用等，证实了此种荷载转换形式的可行性。同时，采用公路桥规中有效分布宽度的方法，计算出相应的桥面板横向应力，规范值与上述3种结果相比大30％～40％。For calculating the transverse internal force in bridge deck of box girder with corrugated steel webs under vehicle load, first, the wheel load is converted into half-sine load which distributed along the longitudinal direction, then, this continuous load is substituted into the frame analysis method model for box girders with corrugated steel webs to solve the transverse internal force of corresponding position. In order to verify the accuracy of this load conversion mode, the calculation value of calculation model is compared to measurement result and data of finite element analysis. It shows that the calculation value got by load form conversion can met the accuracy requirement compared to the measurement result and data of finite element analysis, and the differences are within 10%. Further numerical analysis of the calculation result under different loading conditions including different loading positions and different amount of concentrated wheel loads verified the feasibility of this load transfer form. Meanwhile, the method of effective distribution width in highway bridge specification is adopted to calculate the corresponding bridge deck transverse stress, the specification value is about 30% -40% larger than the abovementioned three kinds of result.

关 键 词：桥梁工程 波形钢腹板箱梁 框架分析法 桥面板 横向内力值 半波正弦荷载 

分 类 号：U448.216.15[建筑科学—桥梁与隧道工程]