Experimental and Numerical Study on Cold-formed Steel Built-up Box Beams

Bunya Chea (Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani, Thailand)
Taweep Chaisomphob (Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani, Thailand)
Wasan Patwichaichote (Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani, Thailand)
Eiki Yamaguchi (Kyushu Institute of Technology)

IPTEK Journal of Proceedings Series
No 6 (2017): The 3rd International Conference on Civil Engineering Research (ICCER) 2017

In this paper, a study of flexural behavior of cold-formed steel built-up box beam which is commonly used in low rise and residential building is presented. Experimental investigation is conducted to understand about the failure mode and the load capacity of the beam in this study. Numerical analysis by using ABAQUS program was performed in order to verify with experimental result. In addition, influence of thickness, connection spacing, and web height and flange width to thickness ratio, affecting load capacity and buckling behavior of the beam, were discussed. The result shows that the finite element analysis can well predict the flexural strength of the beam and the thickness and connection spacing are the key factors to improve load capacity of the beam.