一、前言钢桥跨结构的纵向联结系,在竖向荷载作用下,由于与主桁弦杆共同工作而受力,对于钢桥上比较常用的三角形、菱形、交叉形及K形四种不同形式的纵联,在竖向荷载作用下,在纵联各杆件所产生的內力的计算公式,在我国现行《铁路桥涵设计规范》以及一般文献上都有介绍和说明。 I. INTRODUCTION Longitudinal coupling system of steel bridge cross-structure under the action of vertical load, due to work together with the main truss chord force, for the more commonly used steel bridge on the triangle, diamond, cross and K-shaped four different The form of longitudinal coupling, under the action of vertical load, the formulas for calculating the internal forces generated by the longitudinal members are introduced and described in the current “Code for Design of Railway Bridges and Culverts” as well as in the general literature.