滇藏公路某连续刚构桥边中跨比取值研究

Research on ratio center span to side span of some continuous rigid frame bridges along Kunming-Tibet Road

指出在连续刚构桥中,边中跨比取值在很大程度上决定了桥梁受力是否合理,国内外大多连续刚构桥的边中跨比都在0.5~0.8的范围内变化,据此将依托工程桥梁的边中跨比设置为0.523~0.75不同的3个比值进行了研究验算,结果表明：0.625的边中跨比在结构受力方面是最优的。

The paper points out the ratio center span to side span determines the reasonable bridge stress in the continuous rigid frame bridges, indicates the ratio of most of the bridges at home and abroad is between 0.5 to 0.8, devises the ratio to be the three ratios between 0. 523 to 0.75 on the engineering bridges, undertakes the research and calculation, and illustrates the ratio of 0. 625 is optimal for the structural stress.