重载桥梁在混合车列作用下横向分布系数的计算方法研究

Study on Computation Method of Lateral Distribution Coefficient of Heavy-load Bridge under Combined Vehicle Group

针对重载桥梁结构分析中没有"混合车列"作用下横向分布系数计算软件这一情况,对其计算方法进行了研究,并提出了编程加载法、替换法、大荷载法等3种计算方法。以天津临港工业区内的一座重载桥梁为例进行验证,成功地解决了目前主要桥梁软件无法计算混合车列横向加载的问题。详细分析了3种计算方法的特点,确定了各自的适用范围,为同类工程的计算分析提供了参考。

Aiming at no lateral distribution coefficient computation software under the 'combined vehicle group' in the structrual analysis of heavy-load bridge,the article studies its computation method,and puts ward three computation methods of program loading method,substitution method and large load method.The validation of a heavy-load bridge in Tianjin Lingang Industrial Area sucessfully solves the problem that the main bridge softwares can not calcualte the lateral load of combined vehicle group.The article analyzes the characteistics of three computation methods in detail,and defines every suitable range,which can be referred for the computaiton adn analysis of the similar projects.