摘要
研究了混凝土大坝闸墩由于气温的交替变化引起开裂的力学机理。采用有限元数值计算方法,分析了混凝土大坝闸墩一年四季的温度场和应力场分布。数值计算结果表明,在寒冷季节混凝土大坝闸墩的温度拉应力会超过混凝土的抗拉强度。针对丰满混凝土大坝闸墩开裂的工程实际问题,提出了闸墩加固修补方法,包括钢筋预应力锚索、混凝土灌浆和表面修复等技术。
The mechanism of pier cracking in concrete dam due to alternative variation of atmospheric temperature is studied.The temperature filed and stress field of the concrete pier in four seasons of the year is calculated by means of FEM.It is found that the tension stress of the pier may exceed the tension strength of the concrete during cold season.The remedial measure for reinforcing piers in Fengman Hydropower Plant to prevent from cracking is proposed accordingly.
出处
《水利学报》
EI
CSCD
北大核心
2004年第3期93-97,共5页
Journal of Hydraulic Engineering
基金
国家自然科学基金资助项目(10072014)
关键词
混凝土大坝闸墩
温度应力
裂缝
加固技术
数值计算
concrete dam
pier
cracking
temperature stress
remedial measure
numerical calculation
