Seismic failure modes and seismic safety of Hardfill dam |
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| Kun XIONG, Yong-hong WENG, Yun-long HE. 2013: Seismic failure modes and seismic safety of Hardfill dam. Water Science and Engineering, 6(2): 199-214. doi: 10.3882/j.issn.1674-2370.2013.02.008 |
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| Authors: | Kun Xiong Yong-hong Weng Yun-long He |
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| Affiliation: | 1. Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010, P. R. China;2. National Dam Safety Research Center, Wuhan 430010, P. R. China;3. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, P. R. China;4. State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University, Chengdu 610065, P. R. China |
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| Abstract: | Based on microscopic damage theory and the finite element method, and using the Weibull distribution to characterize the random distribution of the mechanical properties of materials, the seismic response of a typical Hardfill dam was analyzed through numerical simulation during the earthquakes with intensities of 8 degrees and even greater. The seismic failure modes and failure mechanism of the dam were explored as well. Numerical results show that the Hardfill dam remains at a low stress level and undamaged or slightly damaged during an earthquake with an intensity of 8 degrees. During overload earthquakes, tensile cracks occur at the dam surfaces and extend to inside the dam body, and the upstream dam body experiences more serious damage than the downstream dam body. Therefore, under the seismic conditions, the failure pattern of the Hardfill dam is the tensile fracture of the upstream regions and the dam toe. Compared with traditional gravity dams, Hardfill dams have better seismic performance and greater seismic safety. |
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| Keywords: | Hardfill dam seismic failure mode seismic safety microscopic damage model |
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