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目前随着大跨径预应力混凝土箱形连续桥的广泛应用,如何正确地计算这种桥跨结构的荷载横向分布问题就成为桥梁设计中更有现实意义的课题之一了。 从现行的箱形梁桥的立体计算来看,国内仍以荷载横向分布系数的方法为主:一种是沿用苏联波氏(H. H. Поливанов)推荐的横向偏载增大系数:弯矩用1.15剪力用1.05;一种是用偏压法;一种是通过电算求偏载增大系数。实质上这些方法都是近似法。
At present, with the wide application of long-span prestressed concrete box-shaped continuous bridges, how to correctly calculate the load transverse distribution of such bridges has become one of the more practical issues in bridge design. According to the current three-dimensional calculation of box girder bridge, the method of horizontal load distribution in China is still the main method. One is the lateral partial load increasing factor recommended by HH Поливанов: Force with 1.05; one is the use of bias method; one is calculated by partial load to increase the coefficient. In essence, these methods are approximations.