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论文类型：期刊论文

发表时间：2018-10-05

发表刊物：INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS

收录刊物：SCIE

卷号：14

期号：10

ISSN号：1550-1477

关键字：Concrete-faced rockfill dam; viscous-spring artificial boundary; non-uniform seismic motion input method; dynamic responses; the generalized plastic model

摘要：The concrete-faced rockfill dam valley foundation was considered as an open energy system and a reasonable non-uniform seismic motion input method was applied to the dynamic analysis of a concrete-faced rockfill dam based on the generalized plastic model. First, the corresponding program was validated by means of the scattering question of an idealized semicircle valley. Subsequently, the seismic elasto-plastic finite element analyses were performed to compare and investigate the performances of a concrete-faced rockfill dam under different seismic motion input methods. The results show that the dynamic responses of the concrete-faced rockfill dam are decreased by 10%-30% approximately with the use of non-uniform seismic motion input method. As a result, the traditional uniform seismic motion input method would overestimate the responses of the dam. From the perspective of seismic safety evaluation, the overestimations would disturb the reasonable assessment of the aseismic capacity of the dam. Moreover, the slope stability analysis results might be conservative and unreasonable due to overestimating the accelerations during the earthquake.