计算力学学报2017，Vol.34Issue(5)：535-540,6.DOI:10.7511/jslx201705001
缝水压力和裂缝面接触条件对重力坝裂缝扩展影响
Effects of in-crack water pressure and contact condition of crack surface on crack propagation in gravity dams
摘要
Abstract
The polygon scaled boundary finite element method (polygon SBFEM ) is used to simulate the crack propagation process of a gravity dam ,including the effects of dam-reservoir-foundation interaction , contact condition of crack surfaces and in-crack water pressure .The contact model can prevent penetration of crack surface effectively .Concerning the distribution of in-crack water pressure ,the aperture of the assumed rigid crack wall ,the opening/closing velocity and the fluid state ,i .e .,laminar flow or turbulent flow are considered .Furthermore ,the cavitation and flow of the in-crack water are simulated based on the condition of continuity .The crack propagation process of the Koyna dam is analyzed to investigate the effects of contact condition of crack surface and in-crack water pressure . According to the results ,the damage is increased w hen the contact condition is considered .Compared with the case of constant water pressure ,the real distribution of water pressure has complicated influence on the results .When the crack is opening ,the possibility of crack propagation is decreased ,or , conversely ,the possibility of crack propagation is increased ,w hen the crack is closing .关键词
裂纹扩展/接触问题/缝水压力/多边形单元/比例边界有限元Key words
crack propagation/contact problem/in-crack water pressure/polygon element/scaled boundary finite element分类
建筑与水利引用本文复制引用
庞林,林皋..缝水压力和裂缝面接触条件对重力坝裂缝扩展影响[J].计算力学学报,2017,34(5):535-540,6.基金项目
国家重点研发计划(项目编号 2016YFB0201000 （）
课题编号2016YFB0201001) （）
国家自然科学基金委创新研究群体基金(51421064 )资助项目 . （51421064 ）
