03387nas a2200409 a 4500 20260818173842.0 100714s2008 th uu|m rtt 0| a1eng d .b12080305 AIT Thesis no.ST-08-08 Poplarp Soongsawang Preliminary design investigation on the use of an offshore concrete gravity base platform in the Gulf of Thailand Pathum Thani, Thailand : Asian Institute of Technology, 2008 125 leaves : ill. Thesis ; no. ST-08-08 A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 2008 The 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. Drilling platforms Thailand, Gulf of Joko Harsono Widjaja, Chairperson Pennung Warnitchai, Examination Committee Anwar, Naveed, Examination Committee RTG Fellowship, Scholarship donor Asian Institute of Technology. Thesis ; no.ST-08-08 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B03968 .b12080305 mnait u 240329 0 100714 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050120818421 CREATED : 2009-02-14 RECORD # : i12640141 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120818447 CREATED : 2009-02-14 RECORD # : i12640153 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160100797 CREATED : 2016-04-22 RECORD # : i12950567 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 91008 91008 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.ST-08-08 30050120818421 2026-08-18 17:38:42 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.ST-08-08 30050120818447 2026-08-18 17:38:42 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.ST-08-08 30050160100797 2026-08-18 17:38:42 1 2026-08-18 40