Hydrodynamic forces on concrete sea wall and breakwater during earthquakes: effects of bottom sediment layers and back-fill soil
✍ Scribed by Bang-Fuh Chen; Chen-Fen Huang
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 762 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0029-8018
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✦ Synopsis
The objective of this paper is to present the effect of sediment characteristics on the dynamic response of sea walls and breakwaters during earthquakes. A finite-difference method is used to calculate the earthquake-induced hydrodynamic pressures of seawater and the pore water in seabed sediment. The water-filled soil mixture is used to model sediment and back-fill soil. The dynamic response of a rigid coastal structure induced by constant ground acceleration is studied, using variable sediment depths and porosity. The dynamic characteristics of the waterembankment-sediment system are investigated, applying four earthquake-records as exciting forces. The result of a quay-walled caisson demonstrates the significance of the seismicinduced dynamic force and the seismic effects should be considered for the design of coastal structures in seismic zone. The damaged wharves of Taichung Port during Chi-Chi earthquake, 21