采用Midas软件的土石坝动力非线性有限元分析

Dynamic nonlinear finite element analysis of earth-rock dam using Midas saftware

作为水利工程中承担防洪、蓄水等重要功能的建筑物,大坝抗震安全非常重要。以乌斯通沟水库土石坝为例,基于动力平衡计算公式及等价线性黏弹性模型,采用Midas软件,建立三维有限元模型,对土石坝的施工和蓄水过程进行模拟,分析得到最大加速度反应、最大永久变形都位于坝顶,与实际情况相符,符合规律及规范要求,验证了大坝结构设计的合理性和工程的安全可靠性,可为土石坝的设计、施工及运行管理提供依据。

As a building that undertakes important livelihood functions such as flood control and water storage in hydraulic engineering,the importance of seismic safety of dams is self-evident.This article takes the Wusitonggou Reservoir earth rock dam as an example.Based on the dynamic balance calculation formula and equivalent linear viscoelastic model,a three-dimensional finite element model is established using MIDAS software to simulate the construction and water storage process of the earth rock dam.The analysis results show that the maximum acceleration response and maximum permanent deformation are located at the top of the dam,which is consistent with the actual situation,in accordance with laws and regulatory requirements,Verified the rationality of the dam structure design and the safety and reliability of the project,aiming to provide a basis for the design,construction,and operation safety of earth rock dams.