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Keywords: scaffold structures, wind loads, steel structures, non-linear analysis, access scaffolds, computational fluid dynamics.

Summary

Research into the analysis of scaffold structures has concentrated on the analysis procedures for the structures with non-linear force-lateral displacement effects including local member and global geometrical imperfections and the influence of the semi-rigid standard-ledger and standard-transom connections. Recent research by Beale and Godley [1] has shown that when scaffolds are sheeted or netted the wind loads assumed from the codes can be of the same magnitude as the dead and imposed loads derived from codes of practice. These wind loads are derived from experiments conducted on permanent structures and make no allowance for any reduction in load arising from the façade of the building to which the scaffold is attached. The only previous theoretical research conducted to determine wind loads on temporary structures was by Irtaza et al. [2] although experimental research has been reported [3].

In order to determine the influence of the façade on the reduction of the wind load effects on sheeted scaffolds the authors have developed a computational fluid dynamics model of a standard sheeted scaffold using the FLUENT package. The computed results were compared with extensive experimental data which were obtained by testing a scaled model in a wind tunnel. The results are presented in this paper and the effects of the façade in reducing the current design pressures discussed.

References

1: R.G. Beale, M.H.R. Godley, "Numerical Modelling of Tube and Fitting Access Scaffold Systems", Advanced Steel Construction, 2, 199-223, 2006.
2: H. Irtaza, R.G. Beale, M.H.R. Godley, "Determination of the effects of the wind load on bare tube access scaffold structures using computational fluid dynamics", in "Proceedings of the Fifth International Conference on Advances in Steel Structures (ICASS 2007)", Singapore, 637-642, 2007.
3: HSE (Health and Safety Executive), "Proceedings of the Conference on Wind Loading on Temporary Structures", Buxton, UK, May, 1994.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 91 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: B.H.V. Topping, L.F. Costa Neves and R.C. Barros Paper 261 Experimental and Numerical Evaluation by Computational Fluid Dynamics of Wind Loads on Sheeted Scaffolds H. Irtaza¹, R.G. Beale² and M.H.R. Godley¹ ¹School of the Built Environment, ²School of Technology, Oxford Brookes University, United Kingdom doi:10.4203/ccp.91.261 purchase the full-text of this paper Full Bibliographic Reference for this paper H. Irtaza, R.G. Beale, M.H.R. Godley, "Experimental and Numerical Evaluation by Computational Fluid Dynamics of Wind Loads on Sheeted Scaffolds", in B.H.V. Topping, L.F. Costa Neves, R.C. Barros, (Editors), "Proceedings of the Twelfth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 261, 2009. doi:10.4203/ccp.91.261 Keywords: scaffold structures, wind loads, steel structures, non-linear analysis, access scaffolds, computational fluid dynamics. Summary Research into the analysis of scaffold structures has concentrated on the analysis procedures for the structures with non-linear force-lateral displacement effects including local member and global geometrical imperfections and the influence of the semi-rigid standard-ledger and standard-transom connections. Recent research by Beale and Godley [1] has shown that when scaffolds are sheeted or netted the wind loads assumed from the codes can be of the same magnitude as the dead and imposed loads derived from codes of practice. These wind loads are derived from experiments conducted on permanent structures and make no allowance for any reduction in load arising from the façade of the building to which the scaffold is attached. The only previous theoretical research conducted to determine wind loads on temporary structures was by Irtaza et al. [2] although experimental research has been reported [3]. In order to determine the influence of the façade on the reduction of the wind load effects on sheeted scaffolds the authors have developed a computational fluid dynamics model of a standard sheeted scaffold using the FLUENT package. The computed results were compared with extensive experimental data which were obtained by testing a scaled model in a wind tunnel. The results are presented in this paper and the effects of the façade in reducing the current design pressures discussed. References 1 R.G. Beale, M.H.R. Godley, "Numerical Modelling of Tube and Fitting Access Scaffold Systems", Advanced Steel Construction, 2, 199-223, 2006. 2 H. Irtaza, R.G. Beale, M.H.R. Godley, "Determination of the effects of the wind load on bare tube access scaffold structures using computational fluid dynamics", in "Proceedings of the Fifth International Conference on Advances in Steel Structures (ICASS 2007)", Singapore, 637-642, 2007. 3 HSE (Health and Safety Executive), "Proceedings of the Conference on Wind Loading on Temporary Structures", Buxton, UK, May, 1994. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £140 +P&P)
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