碩士 / 國立中央大學 / 土木工程研究所 / 89 / Abstract
Land reclamation has been rapidly developed and heavy industry facilities are being constructed along southwestern coast of Taiwan. Structures such as quay walls, moles or bridge abutments may move seawards as a result of liquefaction of sand backfill behind retaining structure system during strong earthquake motion. The measured data of centrifuge model are used to analysis the response of a caisson type quay wall during liquefaction induced by a strong earthquake and a procedure for the determination of lateral displacement of caisson type quay wall is proposed.
In this thesis, observed the relationship of phase shift, the reduction of acceleration amplitude and shear wave velocity resulted from liquefaction. Not only relationship of phase shifts between input motion and responses of the quay wall, including horizontal translation mode, rotation model and input base motion, but also that between the responses of the quay wall and the backfill are found. In addition, the fundamental frequency of the quay wall is reduced to a lower frequency due to the reduction of system stiffness resulted from the excess pore water pressure increased during vibration. The phenomenon is more apparent when the coefficient of permeability of soils is lower.
Coupled equations of motion presented by Siddharthan al. (1992) were revised by considering the influence of water. A revised procedure for determination of lateral displacement of the quay wall will be proposed. The comparison of results between numerical analysis and centrifuge tests is well. The result of numerical analysis is closed to the hazard in Taichung Harbor. The methodology can be well applied to a caisson type quay wall design in engineering.
| Identifer | oai:union.ndltd.org:TW/089NCU00015086 |
| Date | January 2001 |
| Creators | 賴志忠 |
| Contributors | 李崇正 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 115 |
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