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M. Hosseini+ and A. Heydari#

+Lifeline Engineering Department, International Institute of Earthquake Engineering and Seismology, Tehran, Iran
#Structural Engineering Group, Tehran South Branch of the Islamic Azad University, Tehran, Iran

doi:10.4203/ccp.70.5.5

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M. Hosseini, A. Heydari, "Optimum Design of Steel I-Section Tapered Girders by using the Lagrange Penalty Function Approach", in , (Editors), "Computational Steel Structures Technology", Civil-Comp Press, Edinburgh, UK, pp 165-174, 2000. doi:10.4203/ccp.70.5.5

Abstract

In this paper a design optimisation procedure for I-section steel tapered beam by using LaGrange penalty function approach is presented. The beam has been supposed to have some lateral supports to prevent it from lateral buckling. The beam depth values at some pre-selected points or design nodes including lateral support points have been considered as the design variables. The beam deflection and the maximum stress due to the bending moment have been chosen as the constraint functions. The beam total weight has been considered as the objective function, which should be minimised subjected to the aforementioned constraints. It is assumed that the beam depth between the design nodes varies linearly, and the width of the beam flange and the thickness of both flange and web are constant along the beam. A computer program, STGOD, has been prepared based on the proposed optimisation procedure. Numerical results show the high efficiency of the proposed procedure.

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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: 70 COMPUTATIONAL STEEL STRUCTURES TECHNOLOGY Edited by: Paper V.5 Optimum Design of Steel I-Section Tapered Girders by using the Lagrange Penalty Function Approach M. Hosseini+ and A. Heydari# +Lifeline Engineering Department, International Institute of Earthquake Engineering and Seismology, Tehran, Iran #Structural Engineering Group, Tehran South Branch of the Islamic Azad University, Tehran, Iran doi:10.4203/ccp.70.5.5 purchase the full-text of this paper Full Bibliographic Reference for this paper M. Hosseini, A. Heydari, "Optimum Design of Steel I-Section Tapered Girders by using the Lagrange Penalty Function Approach", in , (Editors), "Computational Steel Structures Technology", Civil-Comp Press, Edinburgh, UK, pp 165-174, 2000. doi:10.4203/ccp.70.5.5 Abstract In this paper a design optimisation procedure for I-section steel tapered beam by using LaGrange penalty function approach is presented. The beam has been supposed to have some lateral supports to prevent it from lateral buckling. The beam depth values at some pre-selected points or design nodes including lateral support points have been considered as the design variables. The beam deflection and the maximum stress due to the bending moment have been chosen as the constraint functions. The beam total weight has been considered as the objective function, which should be minimised subjected to the aforementioned constraints. It is assumed that the beam depth between the design nodes varies linearly, and the width of the beam flange and the thickness of both flange and web are constant along the beam. A computer program, STGOD, has been prepared based on the proposed optimisation procedure. Numerical results show the high efficiency of the proposed procedure. 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 £50 +P&P)
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