Offshore platform may face fire attack during its service time for oil and gas drilling process. As both the yield strength and the elastic modulus are severely deteriorated at elevated temperature, the offshore platform has a loss in its load-carrying capacity or even loses such capacity. Based on heat transfer theory and finite element simulation, this study analyzed the fire resistance of welded tubular joints in the offshore platform. The failure process of the tubular joints in fire condition is investigated. The emphasis is focused on the investigation on improving the critical temperature of a tubular joint in fire condition by locally increasing the wall thickness of the chord. The results indicate that increasing the wall thickness of the chord locally can improve such critical temperature efficiently for a tubular joint, and thus, it is useful to increase the fire endurance time for an offshore platform in fire condition.
Fire resistance Tubular joints Increasing wall thickness locally Critical temperature
This is a preview of subscription content, log in to check access.
Thandavamoorthy TS, Madhava Rao AG, Santhakumar AR (1999) Behavior of internally ring-stiffened joints of offshore platforms. J Struct Eng ASCE 125(11):1348–1352CrossRefGoogle Scholar
Lee MMK, Llewelyn-Parry A (2005) Strength prediction for ring-stiffened DT-joints in offshore jacket structures. Eng Struct 27(3):421–430CrossRefGoogle Scholar
Fung TC, Chan TK, Soh CK (1999) Ultimate capacity of doubler plate reinforced tubular joints. J Struct Eng ASCE 125(8):891–899CrossRefGoogle Scholar
Choo YS, van der Vegte GJ, Zettlemoyer N, Li BH (2005) Static strength of T-joints reinforced with doubler or collar plates-part I: experimental investigations. ASCE 131(1):119–128CrossRefGoogle Scholar
Shao YB, Lie ST, Chiew SP (2010) Static strength of tubular T-joints with reinforced chord under axial compression. Adv Struct Eng 13(2):369–378CrossRefGoogle Scholar
Shao YB, Zhang JC, Qiu ZH, Shang JJ (2009) Strength analysis of large-scale multiplanar tubular joints with inner-plate reinforcement. Int J Space Struct 24(3):161–177CrossRefGoogle Scholar