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在桥梁设计中,应用集中荷载与影响线坐标计算活载引起的结构反力与内力,其工作量是很大的。在计算中,为确定车辆最不利位置需要试算,每次按∑P_iη_i计算又相当烦琐。因此,实际上就采用折算好的均布的“等代荷载”来代替车辆的布置与试算,只要查出一个等代荷载值,计算出一个相应影响线面积,二者相乘之积即是某级车辆作用下,所求相应内力的最大值。
In bridge design, the application of concentrated load and influence of line coordinates to calculate the dynamic load caused by structural reaction and internal forces, the workload is great. In the calculation, in order to determine the most unfavorable position of the vehicle needs a trial calculation, each calculated by ΣP_iη_i and very cumbersome. Therefore, in fact, the uniform equivalent of the “equivalent load” instead of the vehicle layout and trial calculation, as long as an equal generation load value is found to calculate a corresponding impact line area, the product of the two multiplied by Is a certain level of vehicles, the maximum value of the corresponding internal force.