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Complexities in the Structural Behaviour of Offshore Structural Members subjected to Dynamic Loading

SUDIPTA CHAKRABORTY, Ajaykumar R. Kambekar

Abstract


Offshore structural members in Maritime Structures are subjected to various kinds of loading starting from Dead Load of structures and Dynamic loads from wind, waves, currents and operational loads during berthing and mooring of ships and vessels. The stability analysis of the structural members also demands an insight into the elastic properties of the founding sea bed level. Due to requirement of transport of large volume of cargoes and related continuous enlargement of ship sizes the conventional approaches for designing demand revision particularly for frequent extreme weather events. A large number of tailormade softwares both for structural requirements (viz. STAADPRO etc.) modified for maritime requirements (viz. SACS etc.) the requirements are endless. This paper discusses some fundamental loading parameters on such structural elements to invite attention of scientists and maritime structural engineers for development of wholistic model of solution taking care of variation of everchanging factors.

Keywords


Dynamic Loading, Structural Behaviour, Offshore Structure, elastic properties, fundamental loading

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References


Panovko, Y.G. and Gubanova, I. I., ‘Stability and Oscillations of Elastic Systems’, (Translated by C.V. Larrick), Consultants Bureau, N.Y., 1965, p. 7.

Beliaev, N.M., ‘Stability of Prismatic rods subjected to varitable longitudinal forces’, Engineering Constructions and Structural Mechanics, 1924, pp.149-167.

Mettler, E., “Biegeschwingungen eins Stabes Unter Pulsierendre Axial last”, Mitt. Forsch. -Anst GHH-Konzern 8,1940, pp.1-12.

Lubkin, S. and Stokker, J.J.,” Stability of Columns and strings under periodically varying forces”, Quarterly Applied Mathematics.,1943,1, pp.216-236.

Beilin, E.A. and Dzyhanelidze, G.U.,” Survey of work on the Dynamic Stability of Elastic Systems”, Prikl, Mat, I Mekhan., Vol.16, No.5, p.635, (Available in English as ASTIA No.AD-264148).

Pipes, L.A.,” Dynamic stability of a uniform straight column excited by a pulsating load”, Journal of Franklin Institute.,1964.277.534-551.

BOLOTIN, V.V.” The dynamic stability of elastic systems,1964(Holden-Days).

Matlock. and Reese, L.C.,” Generalized Solutions for Laterally Loaded Piles", Journal of the Soil Mechanics Division, ASCE, October 1961, pp.673-694.

Brown, J.E., Hutt. and Salama, A.E.,” Finite Element Solution to Dynamic Stability of Bars”, AIAA Journal,1968,6. pp1423-1425.

Ahuja, R. and Duffield, R.C.,” Parametric instability of variable cross-section bars resting on an elastic foundation", Journal of Sound and Vibration,1975,39, pp159-174.

Burney, S.Z.H. and Jaeger, L.G.,” A method of determining the regions of instability of a column by a numerical method approach”, Journal of Sound and Vibration,1971,15. pp75-91.

Abbas, b.a.h. AND Thomas, J.,” Dynamic Stability of Timoshenko Beams resting on an elastic foundation", Journal of Sound and Vibration,1978,60. pp33-44.

Datta, P.K. and Chakraborty S;” Parametric Instability of tapered beams by finite element method", The Journal of Mechanical Engineering Science, Volume 24, No.4, Dec.1982., pp205-208.

Shastry, B.P., and Rao, G.V.,” Dynamic Stability of a cantilever column with an intermediate concentrated periodic load", Journal of Sound and Vibration,1987,113, pp194-197.

Datta, P.K. And Nagraj, C.S.,” Dynamic instability behaviour of tapered bars with flaws supported on an elastic foundation", Journal of Sound and Vibration,1989,131(2), pp227-229.

Datta, P.K. And Lal, M.K.” Static stability of a tapered beam with localized damage subjected to an intermediate concentrated load”, Computers and Structures,1992, Vol.43., No.5, pp 971-974.

Bull, J.W., “Soil-structure interaction: Numerical Analysis and Modelling”,1994, E&FN Spon, (Chapter 13-Vibration of pile foundations, Lilley, D.M., pp459-493).

West, R.P., Heelis, M.E., Pavlovic. and Wylie, G.B. (1998a),” The stability of end-bearing piles in a non –homogeneous elastic foundation”,1998, forthcoming in Int. Jnl. of Numerical and Analytical Methods in Geomechanics.,

West, R.P., Heelis, M.E. And Pavlovic, M.N. (1998b),” Stability of friction piles in homogeneous and non-homogeneous elastic foundations", forthcoming in Journal of Applied Mechanics, ASCE

Janseen, W.,” Offshore Berthing Structures-1 & 2.” Lecture Note for Master of Eng. Course in Hydraulic Engineering (Coastal Engg. And Port Development),1999., International Institute for Infrastructural, Hydraulic and Environmental Engineering, Delft, Netherlands.

Chakraborty Sudipta., " A Computational Approach to The Dynamic Stability Analysis of Pile Structures by Finite Element Method " Proceedings of "International Conference on Civil Engineering in the New Millennium: Opportunities and Challenges" at Bengal Engineering and Science University, Howrah 2007

Vrouwenvelder. A & Witteven; Lower bound approximation for elastic buckling loads, HERON, Vol.20. N0.4,1975 (STEVIN-Laboratory of Civil Engineering Dept. Of Delft University of Technology, Netherlands

Chakraborty S; Critical buckling load for raker pile by physical approximation model approach; Proceedings of International Conference on Engineering for Ocean and Offshore Structures and Coastal Engineering Development, December 2001, Singapore

BS 6349-Part 4: Code of practice for design of fendering and mooring systems.

Literature from Fender Manufacturer (https://www.mermaid-consultants.com/mooring-and-berthing-load-calculation)


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