基于突变理论的拱坝整体安全度分析  

Analysis of global safety degree of arch dam based on catastrophe theory

作　　者：王少伟[1] 夏辉[2] 崔英杰[1] 任娇[1] 

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]江苏省水利勘测设计研究院有限公司,江苏扬州225009

出　　处：《河海大学学报（自然科学版）》2012年第5期544-548,共5页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(51139001;51179066;51079046);河海大学水文水资源与水利工程科学国家重点实验室专项基金(2010585212)

摘　　要：将尖点突变理论引入拱坝地基系统整体安全度分析中,建立拱坝地基系统的尖点突变模型失稳判据。将系统稳定状态归结为一个可定量计算的判别式,实现拱坝整体安全度的量化分析。结合某碾压混凝土拱坝数值仿真分析模型,通过三维非线性有限元计算坝体位移场,基于典型点位移尖点突变模型失稳判据得到该拱坝的整体安全度为3.5,且评判结果与塑性屈服区贯通准则相一致。The cusp catastrophe theory was introduced to the evaluation of the global safety of a system of an arch dam and its foundation, and the relevant instability criterion, which was used to represent the system＇ s state of stability through quantitative calculation, was established. Based on the displacement field of a RCC arch darn simulated by a three-dimensional nonlinear FEM model, the global safety degree of this arch dam was 3.5 according to the instability criterion of the cusp catastrophe model of displacement, and the evaluation result was in agreement with the transfixion criterion of the plastic yield area.

关 键 词：拱坝 整体安全度 失稳判据 尖点突变模型 超载系数 

分 类 号：TV642.4[水利工程—水利水电工程]