摘要
针对国外位于强震区的某重力坝,利用基于Hillerborg断裂力学理论的混凝土非线性本构模型,精细地建立了三维地基与坝体相互作用的有限元计算模型。根据坝址的地震动参数,拟合了水平向、竖直向的两条人工地震波,同时施加到重力坝体上,进行了非线性动力时程法的分析计算,揭示了重力坝复杂的地震响应变化规律。数值计算成果满足规范设计要求,为重力坝结构抗震设计提供了一定的科学参考。
Aiming at a gravity dam located at strong earthquake zone abroad, using the nonlinear constitutive model based on fracture mechanics theory of Hillerborg, the three dimensional finite element calculation model of damfoundation dynamic interaction was established precisely. According to ground motion parameters of dam site, horizontal and vertical artificial seismic waves were fitted, the gravity dam that is applied by two seismic waves at the same time was calculated and analyzed by nonlinear dynamic time-history method, the complicated change law of gravity dam seismic response was revealed, numerical calculation results meet the design requirements and it provides a scientific reference for anti-seismic structure design of gravity dam.
出处
《世界地震工程》
CSCD
北大核心
2015年第1期267-270,共4页
World Earthquake Engineering
关键词
重力坝
有限单元法
材料非线性
动力时程分析
gravity dam
finite element method
nonlinearity of material
dynamic time-history analysis
