基于不同混凝土强度准则的高拱坝脆性破坏范围研究  

Various concrete strength criteria-based study on range of brittle damage of high arch dam

作　　者：吴晓彬[1] 王志强[2] 

机构地区：[1]江西省水利科学研究院,江西南昌330029 [2]南昌工程学院水利与生态工程学院,江西南昌330099

出　　处：《水利水电技术》2016年第2期24-26,32,共4页Water Resources and Hydropower Engineering

基　　金：国家自然基金(51469017);江西省水利厅科技项目(KT201205)

摘　　要：基于目前拱坝安全度评价中不同的混凝土强度准则对应的坝体破坏范围不同,介绍了采用的脆性破坏本构关系和单轴、双轴、三轴三种混凝土强度准则。以溪洛渡水电站高拱坝为例进行了计算。结果表明三轴强度准则对应的建基面相对破坏范围与双轴强度准则对应的结果基本相同,比单轴强度准则的结果稍大。双轴和三轴强度准则同时考虑了第一主应力为拉应力和第三主应力为压应力对坝体破坏的影响,而且坝体底部上游侧部分区域处于拉压状态,评判更加合理。In accordance with the status that the corresponding dam damage ranges to various concrete strength criteria are different,the adopted brittle damage constitutive relation and three concrete strength criteria,i. e. uniaxial,blaxial and triaxial concrete strength criteria are described herein. Furthermore,a calculation is made by taking the high arch dam of Xiluodu Hydropower Station as the case. The result shows that the corresponding relative damage range of the foundation surface to the triaxial concrete strength criterion basically coincides with the result that is corresponded to the blaxial concrete strength criterion and is a little bit larger than that of the uniaxial one. Both the blaxial and triaxial concrete strength criteria simultaneously consider the impacts on the dam damage from that the first principal stress is the tensile stress and the third principal stress is the compressive stress,and that the area of the upstream side of the dam bottom is under a tensile-compression status,thus the judgement is more reasonable.

关 键 词：溪洛渡水电站 高拱坝 脆性破坏 强度准则 破坏范围 

分 类 号：TV624.4[水利工程—水利水电工程]