摘要
文中介绍了两种模拟拱坝径向横缝的力学模型 ,应用非直接对接的自由子结构方法 ,在模态子空间内建立了拱坝地震反应分析的非线性动力方程 ,提出了考虑动水压力影响的近似计算方法 .
Two mathematical models for simulating the opening and closing of contraction joints in normal direction in arch dams are presented in this paper. Applying the modal synthesis technique of free\|substructures without directly coupling, the nonlinear equations of motion for seismic response analysis of arch dams is established in the new generalized coordinates spaced by the truncated modes of all monoliths substructures. Furthermore, a new approach, the modal perturbation method, is suggested to calculate approximately the effect of the dynamic pressure on the seismic responses of arch dams. The numerical results of a simple example show that different models of the contraction joints have significant influences on the seismic responses of the arch dams.
出处
《水利学报》
EI
CSCD
北大核心
2000年第6期14-19,共6页
Journal of Hydraulic Engineering
基金
国家自然科学基金!( 5 897940 2 )
关键词
拱坝
横缝
地震反应
自由子结构模态综合法
arch dam
contraction joints
seismic response
modal synthesis of free\|substructures.
