混凝土桥墩的非线性分析

NONLINEAR ANALYSIS OF CONCRETE BRIDGE PIERS

本文针对单线铁路混凝土重力式桥墩,研究了考虑材料非线性和几何非线性的分析方法。用编制的计算程序,计算了截面轴力-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,在使用合理的本构关系和计算模型的基础上,用本文研究的方法对桥墩进行非线性分析,可以模拟桥墩从开始受荷、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理论分析手段。

In this paper, an analysis method in consideration of the nonlinearity of materials and geometry for gravity concrete piers in railway bridges is studied. The Axial force-Moment-Curva-ture relationships of the cross sections are calculated and the full range of load-displacement curves of the piers subjected to transverse force are also calculated. Based on adequate constitutive relations and proper analysis models, this analysis method can be used to simulate the full range, from loading, cracking to crashing, and it provides an efficient means of theoretic analysis in studying the problems of ultimate loads, ultimate deformation and nonlinear design method for bridge piers.