文档介绍：某混凝土重力坝裂缝成因及扩展分析
马田刘枫朱今凡
[中水东北勘测设计研究有限责任公司,130021]
[ 摘要] 某混凝土重力坝地处北方寒冷地区,竣工后搁置 9 年未蓄水,经现场检查发现坝体出现多处裂缝。
为了研究坝体裂缝的成因及进一步发展的趋势,用 ANSYS 软件对多年周期性温度场和秋、冬季寒潮降温进
行了热-应力耦合分析。结果表明,冬季低温和秋、冬季寒潮是大坝产生裂缝的主要原因,且裂缝存在继续
扩展的可能。
[ 关键词] 混凝土重力坝裂缝成因裂缝扩展 ANSYS 热-应力耦合
Analysis of Causes and Expansion of Cracks
in a Concrete Gravity Dam
Ma Tian Liu Feng Zhu Jinfan
[China Water Northeastern Investigation, Design & Research Co., Ltd., 130021]
[ Abstract ] A concrete gravity dam,which is located in northern cold regions, is without water storage
after pletion of 9 years, and there are multiple cracks being founded in the dam through site
inspection. In order to study causes of the cracks and their further development trend, a heat-stress
coupling analysis of periodic temperature field and cooling in cold wave of autumn and winter is carried out
by using ANSYS FEM software. The results show that low temperature in winter and cold wave are the
main causes of the cracks in the dam, and the cracks may continue to expand.
[ Keyword ] Concrete gravity dam, Crack cause, Crack expansion, ANSYS, Heat-stress coupling
1 前言
某水电站位于吉林省境内,是一座以发电为主,兼有其它效益的水电工程,由拦河坝,引
水隧洞,发电厂房等组成。拦河坝为 3 级建筑物,坝长 256m,坝高 31m,由混凝土重力坝和粘
土心墙土石坝组成。该工程地处严寒区,属北温带大陆性季风气候区,冬季漫长严寒多雪,夏
季短促温热多雨,春季凉爽冷空气活跃。极端最高气温 ℃,极端最低气温零下 ℃。大
坝于 2003 年建成,电站建成后由于各种原因长期闲置,多个混凝土坝段出现不同程度裂缝。
根据该电站大坝缺陷检测分析报告,坝体