摘要
针对无限元边界模拟地基可解决使用截断地基时地震波在地基中的能量无法逸散的问题,以观音岩重力坝为例,采用混凝土塑性损伤模型和无限元人工边界,计算了重力坝在不同地震荷载作用下的动力时程响应,验证了无限元边界对地震波能量的逸散作用,比较了材料损伤引起的材料刚度降低对坝体响应的影响,获得了不同地震荷载下坝体损伤的发展规律。
The infinite boundary method is used to solve the problem that the seismic wave energy cannot be dissipa- tive in the truncated foundation, Taking Guanyinyan gravity dam for an example, the damaged concrete plasticity model and infinite element boundary method are used to simulate the dynamic time history response of gravity dam under earth- quake load. And then it verifies the effect of energy dissipation with infinite element method and effectiveness of simula- tion of seismic wave propagation with infinite element boundary. Through compared with the impact of the stiffness deg- radation caused by material damage on the response of the dam body, the damage growth laws of gravity dam is obtained under earthquake load.
出处
《水电能源科学》
北大核心
2013年第11期70-73,253,共5页
Water Resources and Power
基金
国家自然科学基金资助项目(51079113)
关键词
重力坝
无限元
损伤模型
动力时程法
gravity dam
infinite element
damage model
dynamic time history method
