BEHAVIOUR OF LIGHT GAUGE SECTIONS AS BEAMS AND COLOUMNS

BEHAVIOUR OF LIGHT GAUGE SECTIONS AS BEAMS AND COLOUMNS

OBJECTIVETo test the Cold rolled section for the structural behavior (as beams and coloumns)under the loading action using the loading frame equipment.To compare the theoretical and practical values of cold rolled section under loading.To test the Hot rolled section in the same way as cold rolled section tested.To analyse the behavior of hot rolled and cold rolled sectionTo conclude the reliability of cold formed steel to use it as a structural member.

What is light gauge section?Light gauge steel construction is very similar towood framed constructionin principle - the wooden framing members are replaced with thin steel sections.The steel sections used here are calledcold formedsections.The sections are formed or given shape at room temperature, in contrast to thickerhot rolledsections, that are shaped while the steel is molten hot.Cold formed steel is shaped by guiding thin sheets of steel through a series of rollers, each roller changing the shape very slightly.The net result is converting a flat sheet of steel into various shaped sections.The steel used here is coated with zinc (called galvanized) or a mixture of zinc and aluminum to protect it from corrosion.

How light gauge section looks?The thicknesses of steel used here range from about 1 to 3mm for structural sections, and 1 to 2mm for non-structural sections.2"x4" and 2"x6" are common sizes.

How it differ from Hot rolled section?HOT ROLLED SECTIONThe process of hot rolling involves rolling steel at a temperature above the steels recrystallization temperature, which takes place over 1700 degrees Fahrenheit. Steel that is above the recrystallization temperature can be shaped and formed much more easily than colder steel, and the steel can start in much larger sizes

COLD ROLLED SECTIONCold rolled steel is manufactured at temperatures below its recrystallization temperature, typically at around room temperature. Because the steel is manufactured at a much lower temperature, theres no need to worry about the steel shrinking or changing form or appearance.

HOT ROLLED SECTIONHot rolled products often will have a scaly finish and more rounded and less precise corners than cold rolled steel will.COLD ROLLED SECTIONThe cold rolled steel end products has a much smoother appearance and may have square corners more accurate in dimension and finish.

How the sections can be designed?For the design of cold rolled sections the following code books are usedIS 801:1975IS 808:1989AS 1163For the design of cold rolled sections the following code books are usedIS 4923:1997IS 800

FLOWCHART OF THE PROJECT

MODELLING OF CR BEAM AND COLOUMN

DESIGN OF CR PIPETHEROTICAL ANALYSISTESTING OF CR BEAM AND COLOUMN USING LOADING FRAMEANALYSIS OF THEOROTICAL AND PRACTICAL RESULTS OF BOTH MATERIALS

DESIGN OF HR PIPEMODELLING OF HR BEAM AND COLOUMNTHEOROTICAL ANALYSISTESTING OF HR BEAM AND COLOUMN USING LOADING FRAME

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PROJECT DONE BYR.NALLATHAMBIS.NAVEEN KUMARK.NIROSH KUMARK..JAI MURUGAN