Safety evaluation of an ancient masonry seawall structure with modified DDA method |
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| Affiliation: | 1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;2. School of Civil and Resource Engineering, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300354, China;2. School of Civil Engineering, Tianjin University, Tianjin 300354, China;1. Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, PR China;2. State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, PR China;3. Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, PR China |
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| Abstract: | The ancient masonry seawall along China’s Qiantang River is an important structure for defending the prosperous estuarine area, including Hangzhou, Jiaxing, and part of Shanghai, against violent floods, tides and waves. Modified discontinuous deformation analysis (DDA) is used here to analyze the failure mechanisms and stability of the blocky seawall structure. The backfilling soil is properly integrated into the DDA model, by means of the proposed soil discretization approach, and with an accurate interface shear strength model that the authors presented. According to the simulation results by the modified DDA, the existing seawall is generally in good state. Nevertheless, routine inspection and early restoration are recommended to avoid progressive failures of the seawall. |
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| Keywords: | Seawall Masonry structure Discontinuous deformation analysis Soil simulation Failure mechanism Stability analysis |
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