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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 the calculation of the transverse internal force of the corrugated steel web box girder bridge deck under vehicle load, the wheel load is first converted into a half-wave sinusoidal load distributed along the span of the bridge, and then the continuous load is substituted into the box beam suitable for corrugated steel webs In the framework analysis model, we can solve the transverse internal force value at the corresponding position. In order to verify the accuracy of this load conversion method, the theoretical calculation of the model is compared with the measured values and the finite element results. The analysis results show that the theoretical calculated value obtained after the conversion of the load form and the measured Value, finite element value compared to the difference are less than 10%, to meet the accuracy requirements. Furthermore, the numerical analysis and verification of the calculation results of the calculation model under a variety of loading conditions, including different loading locations and different numbers of concentrated wheel loads, confirm the feasibility of such load conversion forms. At the same time, using the method of effective distribution width in highway bridge gauge, the corresponding transverse stress of bridge deck plate is calculated. The standard value is 30% ~ 40% larger than the above three kinds of results.