素混凝土矮墩的全过程分析

Full Range Analysis of Plain Concrete Short Bridge Piers

本文对墩高在20m 以下的素混凝土单线铁路重力式桥墩,研究了考虑材料非线性和几何非线性的分析方法。用所编制的计算机程序,计算了截面的轴力—弯矩—曲率关系,并进行了桥墩在承受逐渐变化的侧向力作用下荷载—位移的全过程分析。它可以模拟素混凝土矮墩在承受轴力和一定方式的侧力条件下,从开始受载,开裂,直至破坏的全过程。为研究桥墩的极限承载能力和极限变形能力,以及考虑非线性性态的设计方法提供了一种计算分析的手段。

In this paper,an analysis method in consideration of the materialand the geometric nonlinearity for plain concrete gravity short piers ofrailway bridges(the height of piers less than 20m)was investigated.The Axial force—Moment—Curvature relationships were calculated andthe full range of Load-Displacement curves for the piers subjected totransverse force were also calculated.Based on proper constitutive relationsand analysis model,this analysis method can be used to simulate the fullrange,from loading,cracking to crashing,and it provides an efficientmeans of computation analysis in studying the problems of ultimate load,ultimate deformation and nonlinear design method for bridge piers.