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Indexed by:期刊论文

Date of Publication:2018-10-05

Journal:INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS

Included Journals:SCIE

Volume:14

Issue:10

ISSN No.:1550-1477

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

Abstract: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.