Dynamic response analysis of Yangfanggou Arch Dam

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[1] [1,Li, De-Yu
[2] Zhang, Bo-Yan
[3] Wang, Li-Tao
来源
Li, D.-Y. (lideyu@iwhr.com) | 1600年 / International Research and Training Center on Erosion and Sedimentation and China Water and Power Press卷 / 44期
关键词
Seismic design - Radiation effects - Arch dams - Earthquakes - Deformation - Damping - Dynamic response;
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摘要
The seismic safety of Yangfanggou Arch Dam, located in the meizoseismal area, is concerned by many researchers. In this paper, The Lagrangian Discontinuous Deformation Analysis (LDDA) is implemented to model the movement of arch dam contraction joints. Viscoelastic boundary is used as energy absorbing boundary to simulate infinite foundation radiation damping, and the earthquake free field input model of arch dams is established. The dynamic response analysis of the Yangfanggou Arch Dam is performed, and then, the influence of the radiation damping and arch dam contraction joints on the stresses of arch dam, the open of contraction joints of arch dam under earthquake action, and the compound stress of static and dynamic on dam are deeply analyzed. Major results can be concluded as follows: dynamic responses of the Yangfanggou Arch Dam significantly decrease in the case of considering open joints and foundation radiation damping effects; dam contraction joints maximum opening is 6 mm, in the range of permissible deformation of joints sealing; on the basis of further optimization of the dam body, the Yangfanggou Arch Dam subjected to design earthquake seismic safety can be guaranteed.
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