简支铰接空心板桥梁格法模拟的探讨

Discussion on Grillage Simulation of Simply Supported Hinged Hollow Slab Bridge

简支铰接空心板桥是我国公路小跨径桥梁的常用结构型式。梁格法是分析桥梁上部结构的一种空间分析方法,能准确模拟桥梁的整体受力特性,从而确定结构的支撑体系、偏载对结构受力的影响等。通过对福建309省道某简支空心板桥运用梁格法进行跨中影响线的计算,对比了平面计算方法与空间计算方法的误差大小,探讨了简支铰接空心板桥梁格法建模的关键步骤。

Simply supported hinged hollow slab bridge is a common structural type of highway small span bridges in China.Grillage method is a kind of spatial analysis method for the analysis of bridge superstructure,which can accurately simulate the overall stress characteristics of the bridge,so as to determine the support system of the structure and the influence of partial load on the structure.Based on the calculation of the mid span influence line of a simply supported hollow slab bridge on provincial highway 309 in Fujian Province by using the grillage method,compare the error between the plane calculation method and the spatial calculation method,and probe into the key steps of the grillage method modeling of the simply supported hinged hollow slab bridge.