ANTI-SEISMIC RESEARCH OF 200M LEVEL RCC GRAVITY DAM IN STRONG EARTHQUAKE AREA
The installed capacity of a hydropower station is 2200MW,which is a large-scale hydropower project.Roller compacted concrete gravity dam is 185 m high,the basic earthquake intensity of dam site area is Ⅷ degree.According to NB 35047-2015 Code for seismic design of hydraulic structures of hydropower project and the evaluation results of seismic safety of engineering sites,the seismic fortification category of the dam is class a,and the peak value of horizontal acceleration of the designed seismic is 0.445g.The anti-seismic safety of the dam has become one of the key technical problems of the project.In this paper,the highest dam section of the riverbed is selected as the research object,and the strength and stability of the dam body under the design and checking earthquake are deeply analyzed by using the finite element response spectrum method and time-history method of the massless foundation and linear elastic finite element method including the radiation damping of the infinite foundation.Nonlinear finite element method including infinite ground radiation damping and material damage is used to study the damage of dam under design and checking earthquake.The calculation results show that the basic shape of gravity dam can meet the requirements of seismic code,and seismic reinforcement measures should be taken for part of the dam.The vulnerable parts under earthquake distribute at the dam upstream slope fold point,dam head,etc.The anti-seismic performance of the dam can be effectively improved by means of seismic reinforcement and circular arc of slope fold point.After comprehensive analysis,the seismic safety of the dam can be guaranteed after appropriate anti-seismic measures are taken.
Roller compacted concrete gravity dam the peak value of horizontal acceleration Seismic Research Plastic damage constitutive model reinforcement
Deng Yunrui Li Zhaojin Zhou Yuefei
POWERCHINA Zhongnan Engineering Corporation Limited
国际会议
the 8th International Symposium on Roller Compacted Concrete (RCC) Dams(第八届国际碾压混凝土大坝国际研讨会)
昆明
英文
227-231
2019-11-11（万方平台首次上网日期，不代表论文的发表时间）