宝珠寺重力坝超载破坏的改进复合单元法模拟

Overloading failure simulation for Baozhusi gravity dam by improved composite element method

本文改进现有复合单元法,使之能模拟动态不连续带的行为与扩展;介绍不连续带出现前后瞬时场变量继承与软化特性模拟等内容,给出相应的数值模拟软件流程图,并利用面向对象技术开发可视化软件系统;将研发的软件系统应用于宝珠寺重力坝超载破坏分析,从破坏轨迹、超载水位及特征点位移-超载系数关系曲线等方面对模型试验与数值模拟的结果进行对比分析。结果表明两者的规律基本吻合,初步证明了本方法及开发软件系统的正确性与有效性。

The current composite element method is enhanced to simulate the mechanical behaviors of dynamic discontinuity bands and their extensions. Some key techniques are introduced, such as inheriting variables, discontinuity bands emerge, simulating softening behaviors of discontinuity bands, et al. Flow chart of coresponding numerical simulation software is provided, and the visual software system is developed by object-oriented technique. The overloading failure process of Baozhusi gravity dam is simulated by software system, and the numeical analysis results are compared with the results of its model test on crack passage, relevant reservoir level, relation curves between displacements and overload coefficients. The analysis results indicate that the computation results are in favorable agreement with those obtained from model test which preliminarily verifies the feasibility and reliability of the described numerical simulation methods and the developed software systems.