Dynamic responses of concrete-faced rockfill dam due to different seismic motion input methods

Bin Xu, Yang Zhou, Chenguang Zhou, Xianjing Kong and Degao Zou

International Journal of Distributed Sensor Networks, 2018, vol. 14, issue 10, 1550147718804687

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.

Keywords: Concrete-faced rockfill dam; viscous-spring artificial boundary; non-uniform seismic motion input method; dynamic responses; the generalized plastic model (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:sae:intdis:v:14:y:2018:i:10:p:1550147718804687

DOI: 10.1177/1550147718804687

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