Numerical investigation of the response of the Yele rockfill dam during the 2008 Wenchuan earthquake |
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| Affiliation: | 1. National Technical University of Athens, Greece;2. University of California Davis, USA;1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, No. 1, Xikang Road, Nanjing 210098, China;2. Department of Civil, Environmental and Architectural Engineering, University of Colorado at Boulder, CO 80309-0428, USA;3. Department of Civil Engineering, The University of Hong Kong, Hong Kong, China;1. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China;2. Zhejiang Design Institute of Conservancy and Hydroelectric Power, Hangzhou 310002, China;3. Institute of Applied Mechanics, Graz University of Technology, Graz 8010, Austria;1. Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata, 605, 00143 Rome, Italy;2. DiCEM – Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via G. Di Biasio 43, 03043 Cassino, Italy |
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| Abstract: | In this paper the seismic response of a well-documented Chinese rockfill dam, Yele dam, is simulated and investigated employing the dynamic hydro-mechanically (HM) coupled finite element (FE) method. The objective of the study is to firstly validate the numerical model for static and dynamic analyses of rockfill dams against the unique monitoring data on the Yele dam recorded before and during the Wenchuan earthquake. The initial stress state of the dynamic analysis is reproduced by simulating the geological history of the dam foundation, the dam construction and the reservoir impounding. Subsequently, the predicted seismic response of the Yele dam is analysed, in terms of the deformed shape, crest settlements and acceleration distribution pattern, in order to understand its seismic behaviour, assess its seismic safety and provide indication for the application of any potential reinforcement measures. The results show that the predicted seismic deformation of the Yele dam is in agreement with field observations that suggested that the dam operated safely during the Wenchuan earthquake. Finally, parametric studies are conducted to explore the impact of two factors on the seismic response of rockfill dams, i.e. the permeability of materials comprising the dam body and the vertical ground motion. |
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| Keywords: | Seismic response of rockfill dams Finite element analysis Hydro-mechanical coupling Wenchuan earthquake Yele dam |
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