基于变形资料的拱坝坝肩稳定安全度分析  

Safety degree analysis of arch dam abutment stability based on deformation observation

作　　者：郑东健[1] 李凤珍[1] 赵斌[2] 

机构地区：[1]河海大学水利水电工程学院,江苏南京210098 [2]国电南京电力自动化研究院大坝及工程监测研究所,江苏南京210003

出　　处：《河海大学学报（自然科学版）》2008年第5期590-594,共5页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(50539030);国家重点基础研究发展规划(973计划)基金(2002CB412707)

摘　　要：针对各种可能工况,通过降强有限元法分析拱坝稳定安全储备系数和相应的坝肩变形场,利用人工神经网络强非线性映射的特点,建立稳定安全储备系数和相应坝肩变形场的映射关系,结合坝肩实测变形场,提出基于实测变形资料的稳定安全储备系数分析方法.应用实例表明,该方法有效可行,为利用变形资料评判拱坝的稳定性提供了量化依据.The arch darn safety factor and the deformation field of dam abutment were analyzed using the strength reduction finite element method under different load conditions. The mapping relationship between the safety factor and the deformation field was established using a BP artificial neural network. An analysis method for the safety factor was presented based on the deformation observation. Case studies show that the proposed method is feasible and effective, and that it can provide a quantitative basis for arch dam stability evaluation.

关 键 词：拱坝 坝肩稳定 有限元法 变形资料 安全度 

分 类 号：TV642.4[水利工程—水利水电工程]