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by B Talie-Faz

Author: B Talie-Faz
Publisher: HSE Books (2002)
Pages: 53 pages
Category: No category
Rating: 4.2
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Static strength assessment of cracked tubular joints Proceedings of the offshore mechanics and Arctic engineering .

Static strength assessment of cracked tubular joints Proceedings of the offshore mechanics and Arctic engineering conference. A series of six static strength destructive tests were performed on full-scale pre-cracked tubular welded T-joints manufactured from a high strength weldable steel used in the construction of offshore Jack-Up platforms. All specimens had at least one through-thickness fatigue crack at the weld toe, from a previous fatigue-testing programme.

B Talie-Faz, W D Dover and F P Brennan UCL NDE Centre. Department of Mechanical Engineering Torrington Place. 1. Nine static strength tests were successfully completed on high strength steel tubular welded joints (T and Y) made from SE702. 2. Normalised ultimate static strength results were compared with typical data produced using BS4360 50D steel. It was found that the reduction in the static strength of cracked high strength steel joints relative to the uncracked strength was greater than that for joints fabricated from 50D steel by 5% at the ordinate intercept.

High strength steels have also been used in tethering attachments for floating structures .

High strength steels have also been used in tethering attachments for floating structures in TLPs (tension leg platforms) and for mooring lines with semi-submersible module offshore drilling units (MODUs) .

High strength steels have also been used in tethering attachments for floating structures in TLPs (tension leg platforms) . embrittlement of high strength offshore steels, Offshore Technology Report (in press no number yet issued) HSE Books (1999), Sudbury, Suffolk.

Instead of mild steel, high-strength steel recently has been employed for the members to reduce the total weight of the .

But it is not assured that the existing formulas for the strength of mild-steel joints are applicable to the high-strength steel joints. Therefore, the static and fatigue tests were performed with 11 full-scale N-joints in high strength steels.

Tubular joints have been widely used in offshore structures, bridge . After the fatigue test, the static strength tests of tubular T-joints are carried out.

Tubular joints have been widely used in offshore structures, bridge structures, space structures and so on, due to their beautiful configurations, excellent mechanical properties and high strength-weight ratio. However, the service environment of these structures is very bad and special, so they often suffer from the cyclic loadings (such as sea wave, sea wind, earthquake and tide). The material properties of steel tubes are tested by uni-axial tensile test (as shown in Fig. 3), and all of them are listed in Table 2. can be concluded that the fatigue surface cracks will come into being at this position.

Statics strength of cracked tubular joints: new data and models. Offshore technology report, OTO 1999/054. Health and Safety Executive. The ultimate strength of Cracked Tubular K-Joints. 49. The static strength of cracked joints and tubular members. Offshore Technology Report, 2001/080. 50. Offshore Technology Report, OTH 497. 1997Google Scholar.

Offshore Technology Report, OTO 1997/800), Health and Safety Executive, UK. HSE (1998). Talei-Faz, . Brennan, F. and Dover, W. D. (2004). Residual static strength of high strength steel cracked tubular joints. Marine Structures, 17: 291–309

Offshore Technology Report, OTO 1997/800), Health and Safety Executive, UK. Offshore Technology Report, OTO 1998/163), Health and Safety Executive, UK. HSE (2000a). POD/POS curves for non-destructive examination. Offshore Technology Report, OTO 2000-018), Health and Safety Executive, UK. HSE (2000b). Marine Structures, 17: 291–309. Tiku, . and Pussegoda, N. (2003).

Myers P, Corrosion Fatigue Fracture Mechanics of High Strength Jack-up Steels, PhD Thesis submitted to. .

Myers P, Corrosion Fatigue Fracture Mechanics of High Strength Jack-up Steels, PhD Thesis submitted to London University, Feb. 1998. Baron G, 'Super Elso SE 702', Creusot Loire Industrie, February 1989. Fatigue and Fracture Mechanics of Offshore Structures Kam J C, Structural Integrity of Offshore Tubular Joints Subject to Fatigue, PhD Thesis, Department of Mechanical Engineering, University College London, 1989.

Ultimate strength, buckling strength, yielding strength, nonlinear analysis, steel structures, aluminium structures, composite . In other chapters, as previous reports, the literature survey related to buckling/ultimate strength is performed regarding ship and offshore structures.

Ultimate strength, buckling strength, yielding strength, nonlinear analysis, steel structures, aluminium structures, composite structures, ship structures, offshore structures, initial imperfections, in-service degradation, uncertainties, reliability, static/quasi-static loads. 369. ISSC Committee II. : Ultimate Strength. The contents of individual chapters shall be introduced briefly in Chapter 2 in connection with the fundamentals in ultimate strength. 374 ISSC Committee II.