多跨长联四线客运专线单箱连续梁桥剪力滞效应分析

Analysis on the Shear Lag Effect of Long Continuous Railway Bridge with Single-Box

对某单箱多室大断面多跨长联客运专线连续箱梁进行了空间受力分析,阐述了剪力滞效应的存在。结合现行规范,分别采用空间有限元法和有效宽度法计算主梁截面在不同工况下的剪力滞系数,并进行了对比。

This paper analyzes the spatial stress status of the multi-span and long continuous beam bridge with a single- box,multi-cell and large section on passenger special line, the existence of shear lag effect is elaborated. Moreover, according to the current criteria, the spatial finite element method and the effective width method are separately adopted to calculate the shear lag coefficient of the main beam cross sections in different working conditions, and the calculating results are finally compared.