大坝缝结构变形形态的简单模拟方法

摘要

为解决传统有限元接触分析算法计算量大、难于收敛的问题,提出采用弹簧间隙组合元对大坝缝初始、张开、灌浆等阶段的工作性态进行准静态和瞬态的模拟方法.通过对大坝缝典型工作形态和弹簧间隙组合元工作原理的分析,设计的几何模型综合考虑了灌浆缝、永久缝和自由缝情况.计算结果表明,该方法较好地反映了大坝缝在灌浆前和灌浆后由温度应力引起的结构变形形态,可为相关计算分析提供参考.%For solving the problems of large amount of calculation and difficult to converge in dam joint structural deformation simulation by using finite element contact analysis, the method for the quasi-static and transient analysis of joint structural deformation at initial, opening and grouting stages is proposed by using combination element of spring-gap. After analyzing the typical operation of dam and the principle of the combination element of spring-gap, the designed model can comprehensively consider grouting joint, permanent joint and free joint. The calculations show that the method can reasonably simulate the structural deformation of joints before and after grouting caused by temperature stress, and provides reference to other analysis.