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Seismic Response of Uviluk Tanker Island

出版	1982
URL	http://books.google.com.hk/books?id=-fz1jwEACAAJ&hl=&source=gbs_api

註釋" ... This report describes an investigation of the accelerations and porewater pressures induced in the sand berm of Uviluk tanker island by specified earthquake motions. Acceleration response spectra for the design of structures and equipment on the tanker island are given for various levels of structural damping. The distribution of porewater pressures generated in the sandfill berm of the island by the specified ground motions is established. The implications of the porewater pressures for the stability of the berm and tanker are discussed. Uvulik tanker island ... was developed from sketches provided by Dome Petroleum. The berm of dumped sand is covered by 3 m of rockfill on which the ballasted tanker is placed. Tanker dimensions are approximately 162 m long, 53 m wide, and 25.3 m high. The effective weight of the ballasted tanker is specified as 190,000 metric tons. Few quantitative data are available on the properties of the foundation soils or the sandfill in the berm. The properties assumed in the dynamic response analyses are discussed in section 3. The maximum anticipated ground acceleration at the Uviluk site is specified as 5% gravity (5% g) (Woodward Clyde Consultants, 1982). Input motions for dynamic response analyses were not provided by Dome Petroleum so suitable records from past earthquakes were selected. Dynamic response analyses of the island were conducted using the computer program, DESRA-2. (Lee and Finn, 1978). The method of analysis incorporated in the program is described in Appendix 1. (Finn et al, 1977). The general principles, assumptions and limitations of the method of dynamic analysis are discussed in section 4. Acceleration response spectra for design of structures and equipment attached to the tanker are given in section 5. Seismically induced residual porewater pressures and their effects on berm and tanker stability are discussed in section 6. General conclusions are presented in section 7 and selected references in section 8. ... (Au) "--ASTIS [online] database.