摘要
针对混合荷载作用下的大坝界面裂纹问题,采用修正裂纹闭合积分法与有限元相结合,计算分析了混凝土重力坝与坝基界面裂纹应变能释放率随坝基刚度变化的规律。结果表明,坝基刚度略大于坝体刚度有利于防止大坝开裂,该法可供大坝设计及安全评定借鉴。
Aiming at the problem of dam interface cracks subjected to mixed load,the modified crack closure integral technique together with finite element method is used to analyze the variation of strain energy release rate of interface cracks with dam foundation stiffness.The results demonstrate that the stiffness of dam foundation slightly larger than that of dam body is beneficial to prevent the crack further propagating.It provides reference for dam design and safety assessment.
出处
《水电能源科学》
北大核心
2010年第6期58-60,共3页
Water Resources and Power
关键词
坝基
重力坝
变形模量
界面裂缝
应变能释放率
dam foundation
gravity dam
deformation modulus
interface crack
strain energy release rate
