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Design of waterfront retaining wall for the passive case under earthquake and tsunami |
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| Institution: | 1. Department of Civil Engineering, University of Tehran, P.O. Box 11155-4563, Tehran, Iran;2. School of Engineering Science, College of Engineering, University of Tehran, P.O. Box 11155-4563, Tehran, Iran;3. Institute of Geophysics, ETH Zurich, Sonneggstrasse 5, Zurich 8092, Switzerland,;1. Geotechnical Engineering Group, CSIR-Central Building Research Institute, Roorkee 247667, India;2. Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore;3. School of Civil and Environmental Engineering, University of Technology Sydney, City Campus, NSW 2007, Australia;4. Department of Transportation Engineering, Hebei University of Water Resources and Electric Engineering, No.1 Chongqing Road, Cangzhou 061001, China;1. Graduate School of Engineering, Kyushu University, Fukuoka, Japan;2. Department of Civil Engineering, Kyushu University, Fukuoka, Japan;1. Caltrans, Office of Earthquake Engineering, Sacramento, CA 95816, United States;2. Civil & Environmental Engineering Department, University of California, Los Angeles, CA 90095, United States |
| Abstract: | The paper pertains to a study of analysing a waterfront retaining wall under the combined action of tsunami and earthquake forces. The stability of the waterfront retaining wall is assessed in terms of its sliding and overturning modes of failure. Pseudo-static approach has been used for the calculation of the passive seismic earth pressure. Hydrodynamic pressure generated behind the backfill due to shaking of the wet backfill soil is considered in the analysis. Tsunami force is considered to be an additional force acting on the upstream face of the wall and is calculated using a simple formula. It is observed that the factor of safety in sliding mode of failure decreases by about 70% when the ratio of tsunami water height to initial water height is changed from 0.375 to 1.125. Variations of different parameters involved in the analysis suggest sensitiveness of the factor of safety against both the sliding and overturning modes of failure of the wall and provides a better guideline for design. |
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