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Keywords: steel girder, non-linear, residual deformations, point bending, radius..

Summary

Gag pressing is sometimes used for cambering and curving steel girders to large radii. In this system, a hydraulic ram presses the girder at selected points to obtain the desired curved profile from induced permanent deformations. This paper presents closed form solutions which relate the applied loads to induced residual deformations for horizontally curving wide flange steel beams based on their postyield response. These solutions are then presented in a parametric form to identify the relationship between key variables and their impact on the accuracy of the curving operation. The idealized qualitative response of the desired curve based on the deformed shape of the girder shows that point bending could yield parabolic curved profiles that are within a percent of a desired circular curve if the span length to radius of curvature ratio is less than 1.5 and the point loads are spaced at one third the beam length. Safe limits are established for loads, strains and curvatures to avoid damaging the steel section. Application of the process is illustrated by a comprehensive numerical example.

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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: 106 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: Paper 16 Non-Linear Analysis of Wide Flange Steel Beams Subjected to Point Bending A.N. Gergess¹ and R. Sen² ¹University of Balamand, El-Koura, North Lebanon, Lebanon ²University of South Florida, Tampa, Florida, USA doi:10.4203/ccp.106.16 purchase the full-text of this paper Full Bibliographic Reference for this paper A.N. Gergess, R. Sen, "Non-Linear Analysis of Wide Flange Steel Beams Subjected to Point Bending", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 16, 2014. doi:10.4203/ccp.106.16 Keywords: steel girder, non-linear, residual deformations, point bending, radius.. Summary Gag pressing is sometimes used for cambering and curving steel girders to large radii. In this system, a hydraulic ram presses the girder at selected points to obtain the desired curved profile from induced permanent deformations. This paper presents closed form solutions which relate the applied loads to induced residual deformations for horizontally curving wide flange steel beams based on their postyield response. These solutions are then presented in a parametric form to identify the relationship between key variables and their impact on the accuracy of the curving operation. The idealized qualitative response of the desired curve based on the deformed shape of the girder shows that point bending could yield parabolic curved profiles that are within a percent of a desired circular curve if the span length to radius of curvature ratio is less than 1.5 and the point loads are spaced at one third the beam length. Safe limits are established for loads, strains and curvatures to avoid damaging the steel section. Application of the process is illustrated by a comprehensive numerical example. 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 £65 +P&P)
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