CAJ | 학술논문

弹性有限元法是目前拱坝安全度评价中广泛采用的方法，其存在一些问题，如混凝土的强度准则不同，得到的坝体破坏范围不同。采用弹性本构关系和三种强度准则，以某高拱坝为例，考虑施工浇筑过程中自重作用下温降荷载组合的研究工况并进行计算，得出采用双轴强度准则计算的建基面相对破坏范围比采用单轴强度准则的结果稍大，与采用三轴强度准则的结果基本相同。采用多轴强度准则考虑了第三主应力为压应力时对坝体开裂产生的影响，结果更加合理。
탄성유한원법시목전공패안전도평개중엄범채용적방법，기존재일사문제，여혼응토적강도준칙불동，득도적패체파배범위불동。채용탄성본구관계화삼충강도준칙，이모고공패위례，고필시공요축과정중자중작용하온강하재조합적연구공황병진행계산，득출채용쌍축강도준칙계산적건기면상대파배범위비채용단축강도준칙적결과초대，여채용삼축강도준칙적결과기본상동。채용다축강도준칙고필료제삼주응력위압응력시대패체개렬산생적영향，결과경가합리。
Elastic finite element method is a widely used method in arch dam safety evaluation,but it also has some problems,for example,the concrete strength criterion is different and the dam destroy range is different. This article firstly introduced the elasticity constitutive relation and three strength criterions,then took a high arch dam as an example and took temperature drop load combination that considering construction process dead weight load as basic research condition to compute,obtained some beneficial conclusions that the relative destroy range of foundation plane corresponding to blaxial strength criterion was slightly bigger than the result of uniaxial strength criterion and was almost the same as the result of tri-axial strength criterion. Because considering the influence of the third principal stress was compressed stress to the dam crack,therefore using mul-tiaxial strength criterion was more reasonable.