基于ANSYS的拱坝动力及可靠度分析

为研究拱坝在地震荷载作用下可靠度指标的变化规律,基于ANSYS对某一拱坝实例进行模态分析和抗震动力分析后,使用二次响应面法计算拱坝在地震荷载作用下第90个计算步的各点可靠度指标,分析得到在地震荷载作用下坝肩处作为抗拉薄弱部分更应重视,拱坝上游坝面中部的可靠度指标变化规律复杂而非单纯降低。为拱坝动力设计及加固措施提供了理论支持。

Analysis of arch dam dynamic and reliability based on ANSYS

In order to study the change rule of reliability index of arch dam under seismic load,after the analysis of mode state and seismic dynamic for of a typical arch dam example based on ANSYS,the paper used the quadratic response surface method to calculate reliability index of each point of arch dam of the 90th calculation step under the action of earthquake load.The result is that it should be paid more attention that dam shoulders being under the action of earthquake load is taken as a weak tensile part . The change rule of reliability index of the middle part of arch dam surface upstream is complex and not to simply reduce.The result can provide a theoretical support for dynamic design and reinforcement measure of arch dam.