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A.F.M. Saiful Amin and S. Ahmad

Department of Civil Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh

doi:10.4203/ccp.56.6.4

A.F.M. Saiful Amin, S. Ahmad, "An Economic Design Approach for Helicoidal Stair Slabs based on Finite Element Analysis", in B.H.V. Topping, (Editor), "Advances in Civil and Structural Engineering Computing for Practice", Civil-Comp Press, Edinburgh, UK, pp 241-246, 1998. doi:10.4203/ccp.56.6.4

Abstract

Eight-node curved thick shell finite elements were used to analyse two prototype helicoidal stair slabs without any geometric idealisation. The results of finite element analysis were compared with those obtained from traditional helical girder solution. The comparative investigation revealed that helical girder solution largely over estimates the vertical moment, lateral moment, lateral shear force and thrust along with an under estimation of torsion. Finally, for critical economic assessment, one of the prototype stairs was designed following ACI ultimate strength design method. The design exercise indicated that around 47% saving of the reinforcement required in resisting the moments and thrust can be achieved in FE approach with an overall economy of around 17%.

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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: 56 ADVANCES IN CIVIL AND STRUCTURAL ENGINEERING COMPUTING FOR PRACTICE Edited by: B.H.V. Topping Paper VI.4 An Economic Design Approach for Helicoidal Stair Slabs based on Finite Element Analysis A.F.M. Saiful Amin and S. Ahmad Department of Civil Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh doi:10.4203/ccp.56.6.4 purchase the full-text of this paper Full Bibliographic Reference for this paper A.F.M. Saiful Amin, S. Ahmad, "An Economic Design Approach for Helicoidal Stair Slabs based on Finite Element Analysis", in B.H.V. Topping, (Editor), "Advances in Civil and Structural Engineering Computing for Practice", Civil-Comp Press, Edinburgh, UK, pp 241-246, 1998. doi:10.4203/ccp.56.6.4 Abstract Eight-node curved thick shell finite elements were used to analyse two prototype helicoidal stair slabs without any geometric idealisation. The results of finite element analysis were compared with those obtained from traditional helical girder solution. The comparative investigation revealed that helical girder solution largely over estimates the vertical moment, lateral moment, lateral shear force and thrust along with an under estimation of torsion. Finally, for critical economic assessment, one of the prototype stairs was designed following ACI ultimate strength design method. The design exercise indicated that around 47% saving of the reinforcement required in resisting the moments and thrust can be achieved in FE approach with an overall economy of around 17%. 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 £95 +P&P)
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