A Simple Mechanism Solution for Predicting the Collapse Loads of I-Beams Subjected to Concentrated Load

Abstract:

In order to solve the problem of web buckling for hot rolled I-beams without membrane subjected to concentrated load, a plastic mechanism analysis that involves consideration of the plastic hinges developing in the flanges and the yield lines forming in the web plate have been made, and a simple theoretical prediction of collapse loads have been developed. At the same time, wide ranges of finite element studies have been made. Based on the finite element results, certain approximations and empirical modifications are introduced because of the complex geometrical nature of the problem and the purpose to make the resulting design method simple enough for routine practical application. The theoretical results have been compared, and show close correlation, with the finite element results.

• Periodical: Key Engineering Materials (Volumes 306-308)
• Pages: 703-708
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.306-308.703
• Online since: March 2006
• Authors: Yi Fu, Xin Hua Ji, Jin Long Chen, Yu Wen Qin
• Keywords: Collapse Load, Finite Element Model (FEM), Plastic Hinge, Web Buckling, Yield Line

References

[1] Roberts, T.M. (1981): Slender plate girders subjected to edge loading proc., Instn. Civ. Engrs., Part2, 71, London, England, pp.805-819.

DOI: 10.1680/iicep.1981.1820

[2] Roberts, T.M. (1983): Patch loading in plate girders. Plated structures-stability and strength R. Narayanan, ed., Elsevier Applied Science Publishers Ltd., London, England, p: 77-102.

[3] Roberts, T.M., and Chong , C.K. (1981): Collapse of plate girders under edge loading. proc., ASCE, 8, p: 1503-1509.

DOI: 10.1061/jsdeag.0005762

[4] Roberts, T.M., and Markovic, N. (1983): Stocky plate girders subjected to edge loading. Proc., Instn. Civ. Engrs., Part 2, 75, London, England, p: 539-550.

DOI: 10.1680/iicep.1983.1444

[5] Roberts, T.M., and Rockey, K.C. (1979): A mechanism solution for predicting the collapse loads of slender plate girders when subjected to in-plane patch loading. Proc., Instn. Civ. Engrs., Part 2, 67, London, England, p: 155-175.

DOI: 10.1680/iicep.1979.2322

[6] Roberts, Newark(1997): Strength of webs subjected to compressive edge loading. Journal of Structural Engineering, february, 1997, ASCE. p: 176-183.

DOI: 10.1061/(asce)0733-9445(1997)123:2(176)

[7] Lyse, and Godfrey,H. J(1935): Investigation of web buckling in steel beams. ASCE Trans, Vol. 100, p: 675-706.

[8] Ketchum, M, S and Draffin, (1932): Strenth of light I-beams. Bull, No. 241, Univ, of Illinois Engr. Experimental Station, Ill.

[9] Bergfelt, A. (1983). Girder web stiffening for patch loading. Rep. S83: 1, Chalmers Univ. of Technol., Goteborg, Sweden.