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Development of Jacket Platform Tsunami Risk Rating System in Waters Offshore North Borneo

Journal of marine Science and Application 2016年第3期15卷 307-320页

作者： H.E. Lee m.S. Liew N.H. mardi K.L. Na Iraj Toloue S.K Wong Offshore Engineering Centre Universiti Teknologi PETRONA& 32610 Perak Malaysia Faculty of Geoscience and Petroleum Engineering Universiti Teknologi PETRONAS 32610 Perak Malaysia Department of Civil Engineering Univerisiti Tenaga Nasional Selangor 43650 Malaysia Department of Civil & Environmental Engineering Universiti Teknologi PETRONAS 32610 Perak Malaysia

This work details the simulation of tsunami waves generated by seaquakes in the manila Trench and their effect on fixed oil and gas jacket platforms in waters offshore North Borneo. For this study, a four-leg living quarter jacket platform located in a water depth of 63 m is modelled in SACS v5.3. malaysia has traditionally been perceived to be safe from the hazards of earthquakes and tsunamis. Local design practices tend to neglect tsunami waves and include no such provisions. In 2004, a 9.3mw seaquake occurred off the northwest coast of Aceh, which generated tsunami waves that caused destruction in malaysia totalling US$ 25 million and 68 deaths. This event prompted an awareness of the need to study the reliability of fixed offshore platforms scattered throughout malaysian waters. In this paper, we present a review of research on the seismicity of the manila Trench, which is perceived to be high risk for Southeast Asia. From the tsunami numerical model tuna-m2, we extract computer-simulated tsunami waves at prescribed grid points in the vicinity of the platforms in the region. Using wave heights as input, we simulate the tsunami using SACS v5.3 structural analysis software of offshore platforms, which is widely accepted by the industry. We employ the nonlinear solitary wave theory in our tsunami loading calculations for the platforms, and formulate a platform-specific risk quantification system. We then perform an intensive structural sensitivity analysis and derive a corresponding platform-specific risk rating model.

关键词： finite element analysis North Borneo jacket platforms manila Trench seaquake SACS tuna-m2 tsunami simulation risk rating system risk rating model

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