关键词: 抗震配筋, 高拱坝, 有限元模型, 坝面配筋, 白鹤滩拱坝

Abstract: The construction of arch dam in high earthquake intensity area is facing higher and higher seismic intensity. The reinforcement in dam surface layer has become the main seismic measure in the design of 300-meter high arch dam. How to evaluate the effect of seismic reinforcement of arch dam has become an important issue. Based on the model of concrete Elasto-Plastic damage constitutive relationship, the finite element model of high arch dam is established, and the incremental dynamic analysis is performed for the evaluation of effects on seismic reinforcement in terms of the deformation, opening degree of transverse joint and damage volume ratio of dam body. The results show that the reinforcement on the surface of arch dam has little effect on damage initiation under design seismic motion, but the seismic effect of the reinforcement on the dam surface is more and more obvious with the increase of seismic intensity and can significantly improve the seismic performance by limiting the development of damaged cracks.

Key words: seismic reinforcement, high arch dam, finite element model, reinforcement in dam surface layer, Baihetan arch dam