某水电站厂房牛腿裂缝检测及成因分析  

Test and formation causes of the cracks of corbel in a workshop of a hydropower station

作　　者：王荣鲁[1,2] 李杰[3] 孙其臣[1,2] 孙粤琳[1,2] 

机构地区：[1]中国水利水电科学研究院结构材料研究所,北京100038 [2]流域水循环模拟与调控国家重点实验室,北京100038 [3]中国长江电力股份有限公司,湖北宜昌443002

出　　处：《中国水利水电科学研究院学报》2013年第4期255-259,共5页Journal of China Institute of Water Resources and Hydropower Research

基　　金：水利部“948”计划项目(201301);中国水利水电科学研究院科研专项“十二五”重点科研资助项目(结集1246)

摘　　要：对某水电站厂房牛腿裂缝进行了详细的调查与检测,对牛腿混凝土进行了多项无损检测,同时对牛腿结构进行了复核计算。采用有限元数值模拟对温度影响下的牛腿受力状态进行了计算,分析了裂缝出现的原因,计算结果与牛腿裂缝形式非常吻合。分析表明,不合理的支座型式及温度应力是牛腿产生裂缝的主要原因,在设计时应考虑温度应力的作用,支座在构造做法上应采取合理措施减少约束应力。文末还针对牛腿破坏的现状,提出了处理方案与加固对策。The formation causes of corbel cracks in a workshop were investigated and analyzed in detail through non-destructive tests and check calculaiton. The stress states of the corbel under the influence of temperature were analyzed through finite element numerical simulation, which found the cause of the cracks. The theoretical analysis conclusion conformed to the pattern of the corbel cracks. It is revealed that unreasonable bearing type and temperature stress were the main reasons for the cracks, which should not be ignored in the design. In the design process, thermal stress should be taken into consideration and rea- sonable measures should be taken to reduce the restraint stress of the bearing structures. Feasible strength- ening strategies were proposed for the corbel cracks

关 键 词：牛腿 裂缝 混凝土 检测 

分 类 号：TV332[水利工程—水工结构工程]