Advanced Steel Construction

Vol. 2, No. 1, pp. 87-108(2006)



S. M. Zahurul Islam*, A. A. Abang-Abdullah, M. S. Jafar

Housing Research Centre, Department of Civil Engineering, Universiti Putra Malaysia

*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)




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Profile steel shell structures are used popularly due to aesthetic and economical use of materials. The aim of this research work is to develop a self-supporting roofing element using profiled steel sheet such as zincalume, with potential for application in affordable quality housing. An analytical investigation using nonlinear finite element method is carried out on the structural strength and behaviour of different types of self-supporting roofing elements. An experimental study is conducted to validate the analytical investigation. Conventionally, profile steel sheet such as zincalume is using in roof as a covering materials using different types of internal support without any attention paid to their structural capability. Self-supporting of roofing system has significant advantages of removing the internal trussing and support. An attempt has been made to find out efficient, economic and aesthetically pleasing shape of shell elements to provide self- supporting roofing system on the basis of present results. The load–   deflection, stress- strain and deflected shape profiles for investigated roofing element is showed that parabolic roofing element having crown height 1/6 of chord length is more efficient than others. It is observed that the proposed roofing system has a great potential to be exploited for housing construction.



Structural performance, profiled steel sheet (zincalume), self-supporting, roofing element, semi-loof elements


[1]   Jagannath, V. and Sekar, U.C., “Precast L-pan roof elements for low cost housing”, Journal of Engineering Mechanics, 1992, 120(1), pp.120-113.

[2]   Capurso, M., “Critical loads of self-supporting cylindrical shell roofs”, International Journal of Solids Structure, 1967, 3, pp.117-141.

[3]   Nilson, A.H., “Folded plate structures of light gauge steel”, ASCE transactions paper, 1963, 128(II), pp.848-880.

[4]   EL-Atrouzy, M.N., “Cylindrical shell roofs made of corrugated metal sheets”, Proceedings of the Fourth International Symposium on Roofing Technology, pp.138-141.

[5]   Sakla, S.S., and Elbeltagi, E., “Design of Steel roofs subjected to drifted snow using genetic optimization”, Computer and Structure, 2003, 81, pp.339-348.

[6]   Rao, P.S. and Rao, A.P., “Behavior of cylindrical shells subjected to support settlement”, Journal of Structural Engineering, 1988, 114(4), pp.931-941.

[7]   Kostem, C.N., and Garrabrant, M.E., “The Effect of vertical support settlements on cylindrical shells”, IASS Conference on Light-Weight Shell and Space Structures for Normal and Seismic Zones, Alma-Ata, 1977, USSR, pp.187-191.

[8]   Simmonds, S.H., “Effect of support movement on hyperbolic paraboloid shells”, Journal of Structural Engineering, 1989, 115(1), pp.19-31.

[9]   Stekelenburg, P.J.Van., Walraven, J.C. and Mathews, M.S., “Development of semi cylindrical ferrocement roofing system”, Journal of Ferrocement, 1980, 10(2), pp.111-118.

[10] Imam, N., Maity, D. and Kalita, U.C., “An investigation on the shape of ferrocement roofing elements”, Journal of Ferrocement, 2002, 32(4), pp.271-286.

[11] Maity, D., Imam, N. and Kalita, U.C., “Finite element analysis of ferrocement roofing shell elements”, International Conference on Construction Management and Materials (CONMAT), 2003, pp.285-294.

[12] Scordelis, A.C. and Lo, K.S., “Computer Analysis of Cylindrical Shells”, ACI Journal, 1964, 61, pp.539-561.

[13] Zahurul-Islam, S.M., Abang-Ali, A.A and Jaafar, M.S., “An Investigation on the Shape of Thin Shell Metal Elements to Develop Self-supporting Roofing System”, International Conference on World Innovation of Structural Engineering WISE, Hyderabad, Andhra Pradesh, India, December 1-3, 2004, pp.42-50.

[14] Abang-Ali, A. A., Zahurul, S. M. and Jaafar, M.S., “Self -supporting Roofing System for Affordable Quality Housing, National Conference on Affordable Quality Housing”, Miri, Sarwak, Malaysia, November, 2004, pp.15-21.

[15] Farshad, M., “Design and Analysis of Shell Structures”, Kluwer Academic Publishers, The Netherlands, 1992, pp.2-39.

[16] LUSAS version 13.5-7, “Finite Element System”, Powerful FE technology for specialist applications, UK, FEA Ltd, 2003.

[17] Martins, R.A.F and Oliveira, C.A.M., “Semi-loof Shell, Plate and Beam Elements-New Computer Versions: Part 1. Elements Formulation”, Engineering Computer, 1988, l(5), pp.15-25. [18] Sze, K.Y., “Simple Semi-Loof Element for Analyzing Folded –Plate Structures”, Structural Engineering, 1989, 115(1), pp.19-31.

[19] Rao, P.S. and Rao, A.P., “Support settlement in continuous cylindrical shell roofs”, Journal of Structural Engineering, 1986, 112(8), pp.1781-1795.

[20] Zienkiewcz, O.C., “The Finite Element Method”, Third edition, McGraw-Hill, UK, 1979, pp.398-422.

[21] Huang, H., “Static and Dynamic Analysis of Plates and Shell”, Springer-verlag, Berling Heidelberg, 1989, pp.67-83.

[22] Krishnamoorthy, C.S., “Finite Element Analysis theory and programming” (Second edition). New Delhi: Tata McGraw-Hill Publishing Company Limited, 2001, pp.465-510. [23] Uniform Building by Law, Malaysian Standard Code of Practice, 1998, pp.34-37.

[24] BS 5427: Part 1: Code of Practice, “The use of profiled sheet for roof and wall cladding on building”, British Standards Institution, 1996, pp.14-15.

[25] BS 6399: Part 1: Design Loading for Building, “Code of Practice for Dead and Imposed Loads”, British Standards Institution, 1996, pp.2-3.

[26] CP 3: Chapter V: Part 2: Wind Loads. “Code of Basic Data for the Design of Building”, British Standards Institution, 1972, pp.4-29.

[27] Zahurul-Islam, S.M., “Structural Strength and Behaviour of Cylindrical Steel Sheet Roofing”, Master Thesis, Civil Engineering Department, Universiti Putra Malaysia, March 2006, pp.33-98.

[28] LUSAS Finite Element System, “LUSAS theory manual”, FEA Ltd, UK., 2004.