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采用显式有限元结合黏弹性人工边界的地震波动反应分析方法,在计入坝体横缝动态接触非线性影响基础上,对溪洛渡拱坝采用模拟孔口及闸墩结构、仅模拟孔口不模拟闸墩和孔口闸墩结构均不考虑的3种模型进行地震响应分析,研究孔口、闸墩结构和大坝的静态和静动综合应力响应。对比分析结果表明,孔口、闸墩的存在对大坝主体的静动综合应力分布规律影响不大,而孔口闸墩区域位于动态反应较大的坝体中上部,由于闸墩的悬挑及截面变化的复杂性,以及孔口对坝身的削弱作用,这一区域将出现数值较大的拉应力集中区,主要分布于上游闸墩根部和下游面深表孔之间以及顶部大梁位置,在溪洛渡拱坝深孔、表孔抗震设计中应予以重视。
Based on the seismic wave response analysis method with explicit finite element and viscoelastic artificial boundary, based on the nonlinear influence of the dynamic contact of the transverse joint of the dam, the simulation orifice and the pier structure are used for the Xiluodu Arch Dam. Three models, which are not considered in the simulation of pier and orifice pier, are used to analyze the seismic responses, and the static and the static stress responses of the pier, pier and dam are studied. The results of comparative analysis show that the existence of orifice and pier has little effect on the distribution of the static and dynamic stress of the dam, while the orifice of the orifice is located in the upper part of the dam with large dynamic response. Due to the cantilever of pier And the complexity of the cross-section change, as well as the weakening effect of the orifice on the dam body, a large tensile stress concentration zone will appear in this area, which is mainly distributed between the root of the upstream sluice pier and the deep surface hole of the downstream face and the position of the top girder In the Xiluodu arch dam deep hole, table hole seismic design should be taken seriously.