钢板梁桥主梁构造及横向分布系数的计算

Calculation of Main Beam Structure and Transverse Distribution Coefficient of Steel Plate Girder Bridge

对钢板梁桥主梁常用的主梁构造型式、主梁横向连接布置方式及荷载横向分布系数的计算进行探讨,一般情况下,在钢板梁跨中设置1~3道中横梁即可满足荷载横向分配的要求;采用刚性横梁法进行钢板梁横向分布系数计算时,可以不考虑主梁抗扭刚度修正;引入荷载横向分配不均匀系数的概念,根据主梁片数,能方便的计算出主梁荷载横向分布系数。

In this paper,the main beam configuration,the layout of the main beam transverse connection and the calculation of the load transverse distribution factor in the main beam of a steel plate beam bridge are discussed.In general,the requirements of load transverse distribution can be met by setting 1~3 middle beams in the middle of the steel plate beam span.When calculating the transverse distribution factor of the steel plate beam with the rigid beam method,the correction of the main beam's torsional stiffness can be ignored.By introducing the concept of load transverse distribution uneven factor,the load transverse distribution factor of the main beam can be easily calculated based on the number of main beam segments.