丹江口大坝结合面性状对安全度影响研究  

Study of Influence of Concrete Interface Property on Dam Safety

作　　者：周秋景[1] 汝楠[2] 朱乃榕 杨波[1] 

机构地区：[1]中国水利水电科学研究院结构材料所,北京100038 [2]水利部国际合作与科技司,北京100053 [3]南京市政设计研究院责任有限公司,南京210008

出　　处：《南水北调与水利科技》2009年第6期136-138,共3页South-to-North Water Transfers and Water Science & Technology

基　　金："十一五"国家科技支撑计划重点项目(2006BAB04A01)

摘　　要：在大坝加高中,新老混凝土结合面作为一个结构薄弱面,施工运行中难免产生开裂现象。为了评价开裂对坝体安全的影响,采用非线性数值分析方法,研究了结合面开裂比例、结合面抗拉和抗剪强度参数等对结构安全的影响。分析结果显示,随着开裂比例增大,结构安全度逐渐减小,但脱开比例变化影响越来越小;结构安全度受未裂结合面抗拉强度、开裂后接触摩擦系数等影响明显,给出了变化规律,提出了建议。Cracks will appear during construction and operation period in the weak old-new concrete interfaces on heightened dams.In order to evaluate the influence of cracks on dam safety,nonlinear numerical methods was used to study the influence of crack ratio,tension strength and shear strength of the interface.The results showed that dam safety factor and the influence of ratio change on safety factor will decrease with the crack ratio increasing.The safety factor was also influenced obviously by tension strength of interface and friction coefficient.Finally,disciplines and advices were given.

关 键 词：安全度 大坝加高 结合面 强度参数 

分 类 号：TV544.921[水利工程—水利水电工程]