气候变化领域集成服务门户(CCPortal): Numerical investigation on seismic behaviour of aged concrete gravity dams to near source and far source ground motions

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DOI	10.1007/s11069-020-04344-7
	Numerical investigation on seismic behaviour of aged concrete gravity dams to near source and far source ground motions
	Gorai S.; Maity D.
发表日期	2021
ISSN	0921030X
起始页码	943
结束页码	966
卷号	105 期号:1
英文摘要	This study presents a numerical investigation on the seismic behaviour of aged concrete gravity dams under near source and far source ground motions. Two-dimensional formulation of a concrete gravity dam is carried out implementing the finite element technique, considering full reservoir and rigid base condition. Degradation of concrete properties due to hydro-chemo-mechanical effects and the influence of sediment layers are taken into account to calculate the response of the dam-reservoir coupled system at different ages. Two near source and far source ground motions from real earthquake events are selected for time-history analysis. Seismic performance evaluation is also carried out to assess the probable damage level of the dam. The outcomes of this study show the variation of seismic response of the dam over the ages and the necessity of considering the aging effect, e.g. degradation of concrete and influence of sediment layers, in the inspection of seismic safety issues of concrete gravity dam. This study also reveals the critical effect of near source ground motions on concrete gravity dams at later ages. © 2020, Springer Nature B.V.
关键词	Dam-reservoir system Degradation of concrete Finite element method Influence of sediment depth Near source and far source ground motions Seismic analysis
英文关键词	concrete structure; finite element method; gravity dam; ground motion; numerical method; seismic response
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206246
作者单位	Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
推荐引用方式 GB/T 7714	Gorai S.,Maity D.. Numerical investigation on seismic behaviour of aged concrete gravity dams to near source and far source ground motions[J],2021,105(1).
APA	Gorai S.,&Maity D..(2021).Numerical investigation on seismic behaviour of aged concrete gravity dams to near source and far source ground motions.Natural Hazards,105(1).
MLA	Gorai S.,et al."Numerical investigation on seismic behaviour of aged concrete gravity dams to near source and far source ground motions".Natural Hazards 105.1(2021).