CAJ | 학술논문

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。
위연구공패재지진하재작용하가고도지표적변화규률，기우ANSYS대모일공패실례진행모태분석화항진동력분석후，사용이차향응면법계산공패재지진하재작용하제90개계산보적각점가고도지표，분석득도재지진하재작용하패견처작위항랍박약부분경응중시，공패상유패면중부적가고도지표변화규률복잡이비단순강저。위공패동력설계급가고조시제공료이론지지。
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 90 th calculation step under the action of earthquake load .The result is that it should be paid more atten-tion 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 sim -ply reduce .The result can provide a theoretical support for dynamic design and reinforcement measure of arch dam .