Abstract
Applications of Cold-Formed Steel (CFS) are widely used in buildings, machinery and etc. Many researchers began the research of CFS as a roof truss system. It is required to increase the knowledge of the configurations of CFS roof trusses due to the uncertainty of the structural failures regarding the materials and rigidity of joints. The objective of this research is to investigate the effect of heel plate length to the ultimate load capacity of CFS roof truss system. Three different lengths of heel plate specimens were fabricated and subjected to concentrated loads until failure. The highest ultimate capacity for the experiment was 30 kN. The results showed that the increment of the length of the heel plate had slightly increased the ultimate capacity and strain. The increment of the length of the heel plate had increased the deflection of the bottom chords but decreased the deflection of the top chords. Local buckling of top chords adjacent to the heel plate was the primary failure mode for all the heel plate specimens.
Highlights
Cold-formed steel (CFS) is composed of steel plate, sheet, and strip material
CFS had been increased in the usage of CFS in new construction from housing areas to commercial buildings in Malaysia based on its advantages such as cost saving, recyclable material, and fast installation
Dawe and Wood [7] identified that the main failure modes for small-scale CFS roof trusses without intermediate members were local buckling of the top chord, followed by distortion of the heel plate
Summary
Cold-formed steel (CFS) is composed of steel plate, sheet, and strip material. It is widely used for construction buildings, machinery, vehicles, and much more. CFS compression member is critical to the limit states, such as yielding and buckling. All these limit states are relying on the cross-section geometry, length, and thickness [1]. Dawe and Wood [7] identified that the main failure modes for small-scale CFS roof trusses without intermediate members were local buckling of the top chord, followed by distortion of the heel plate. Wood and Dawe [8] determined that the major failure modes for full-scale CFS roof trusses were local buckling of the top chords, followed by crippling of the heel plate with the failure of the screws. The objective of this research is to investigate the effect of heel plate length to the ultimate load capacity of CFS roof truss system
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