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035 _a.b12080305
099 9 _aAIT Thesis no.ST-08-08
100 0 _aPoplarp Soongsawang
245 1 0 _aPreliminary design investigation on the use of an offshore concrete gravity base platform in the Gulf of Thailand
260 _aPathum Thani, Thailand :
_bAsian Institute of Technology,
_c2008
300 _a125 leaves :
_bill.
490 1 _aThesis ;
_vno. ST-08-08
500 _aA thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology
502 _aThesis (M.Eng.) - Asian Institute of Technology, 2008
520 _aThe offshore concrete gravity base structure (CGBS) is the structure placed on seabed against the loadings without any piles. The advantages of CGBS compared to typical jacket platform are the ability to storage crude oil, ability to decommission after the use, more capacity to carry payloads, less time for onsite installation, and more durable. The objective of the research is to optimize the geometrical dimensions of CGBS to satisfy both of floating case and in-place case especially in Gulf of Thailand whose water depth is less than 85 meters. The parametric study of geometrical dimensions is conducted for 3 water depths, 20, 28, and 41 meters, and then the parameters consisting of payload, wave height, and soil conditions are varied to observe the structural behavior of mini CGBS. The four mini CGBS per water depth are modeled using SAP2000, after that the quasi»static analysis is conducted and shell thicknesses are obtained. The results are interpreted in term of floatability and stability at any geometrical dimensions. Then the three varied parameters of each loading and soil conditions are applied to observe the behavior of mini CGBS for in-place case. The results are presented as the topsides displacement and the soil settlement. The results of two cases are quite clear that the geometrical dimensions affect significantly both floating case and in-place case.
650 0 _aDrilling platforms
_zThailand, Gulf of
700 1 _aJoko Harsono Widjaja,
_eChairperson
700 0 _aPennung Warnitchai,
_eExamination Committee
700 1 _aAnwar, Naveed,
_eExamination Committee
710 2 _aRTG Fellowship,
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno.ST-08-08
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B03968
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