Buckling Behaviour Of Thin Walled Angle Section Beam Subjected To Pure Bending Moment

Mohd Razi, Supeno (2006) Buckling Behaviour Of Thin Walled Angle Section Beam Subjected To Pure Bending Moment. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This thesis presents buckling behaviour of thin walled angle section beams subjected to pure bending moment. Under certain condition, usually involving compressive stresses, a structural member may develop large distortions under critical loading conditions. This condition is described as buckling. Buckling may be demonstrated by pressing the opposite edge of a plate towards one another. Forty cold formed galvanized mild steel angle sections were tested in four-point bending with the unstiffened flanges in compression. Effective width method according to British Standard specifications, BS5950 (British Standard Institution BS5950-Structural use of steelwork in building, Part 5: Code of practice for design cold-formed sections BSI, 1998) were used considering both simply supported and partially fixed boundaries to predict the moment capacity and resulting midspan deflections and to compare with experimental results. In this project detailed explanation on how the rig experiment, which is used to run the experiment, is shown. As a result the maximum moment and centered deflection is observed and recorded. Results show that the flange of thin-walled specimens was more stiffened when the value of angle and thickness increased. Graphs were plotted clearly show the existence of two phases which is linear and non-linear based on graph shape. From the entire graphs that have been plotted, the graphs of effective-width method value is lesser than the experimental method. Graphs also show that when angle value increase, maximum moment also increase.

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