Failure Analysis Methods of Concrete Arch Dams Based on Elastic Strain Energy Criterion

摘要：

　　The arch dam is a kind of massive water retaining structures pouring with concrete.The overall failure mechanism and corresponding analyzing criterion are key concerning issues in dam engineering field.In this paper, the energy evolution of arch dam in the failure process is studied firstly, that it can be decomposed as dissipationenergy accompany with concrete damage, and elastic strain energy absorption and releasing during elastic deformation.Then, an evaluation criterion for failure analysis of concrete arch damsisestablished based on elastic strain energy.Afterwards, an orthotropic damage constitutive model for dam concrete is proposed, and the numerical simulation method of which is established for structural failure analysis.Numerical simulations show that the value of elastic strain energy in elements,rise with an increase of the overload safety coefficient and finally converge to the material surface energy, at which time the local plastic damage area develops rapidly and finally leads to cracking failure of structures.The proposed failure analysis criterion for concrete dams under integrated loads is suitable for analyzing dam instable failure, which is of great operability and engineering application value in the future.

关键词： Concrete dam Elastic strain energy Failure evaluation criterion Orthotropic damage

作者: Chen Bo GuChongshi Wu Bangbin

作者单位: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University,Nanjin State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University,Nanjin

会议类型: 国内会议

会议名称: 全国大坝安全监测技术信息网第八届全网大会暨2015年全国大坝安全监测技术与应用学术交流会

会议地点: 南京

会议语种:英文

页码: 387-402

在线出版日期: 2015-11-01（万方平台首次上网日期，不代表论文的发表时间）