摘要
以连续损伤力学为基础,用三维动力损伤有限元模型分析混凝土重力坝及其岩石基础在爆炸冲击荷载作用下的各向异性脆性动力损伤问题。把有效应力和损伤应变能释放率的概念引入岩石类介质的脆性动力损伤演化模型,并应用于自主开发和研制的三维各向异性脆性动力损伤有限元程序(ADDFEP3D),分析模拟在爆炸冲击荷载作用下混凝土重力坝及其岩石基础内的位移场、应力场、损伤场、应变能释放率和破坏失效分布场的动力响应过程,并用三维等值线图和过程演示图描述部分数值分析结果。研究结果可为重力坝抗爆性能评价的进一步深入研究提供有参考意义的方法和基础。
The three-dimensional finite element analysis of anisotropic brittle dynamic damage mechanism for gravity dam and rock foundation subjected to the blast-impact load has been carried out. The concepts of effective stress and damage strain energy release rate have been taken into account to develop the dynamic damage evolution model, which is employed to develop the three-dimensional anisotropic dynamic damage finite element program. The processes of dynamic response including the fields of displacements, stresses, damage state, strain energy release rates as well as failure situation in the dam under the blast-impact load have been simulated and presented by three-dimensional counter graphics and animations. The analytical results can provide a useful method to improve the further studies.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第8期1598-1605,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(50379046)
教育部博士点特别研究基金资助项目(A50221)
关键词
数值分析
损伤演化律
三维有限元动力分析
各向异性脆性动力损伤
混凝土重力坝与岩基
爆炸冲击荷载
numerical analysis
damage evolution
three-dimensional dynamic finite element analysis
anisotropic brittle dynamic damage
concrete gravity dam and foundation system
blast-impact load
