The Experimental Study on Concrete-Filled Thin-Walled Square Steel Tube Short Columns Fixed U-Shaped Steel Bars

Abstract:

Based on the compression characteristics of the concrete-filled thin-walled square steel tube short columns, the U-shaped tie bars are designed in this paper. The U-shaped tie bars and steel pipe walls are connected with each other in T-shape in order to enhance the local stability of the walls under pressure. According to the concrete strength C30/C35/C40 and the thickness of the steel plates 1.25mm/1.75mm/2.5mm,42 short-column specimens are made, and the size of all specimens is 200mm×200mm×690mm.The bearing capacity test is done by the 500-ton electro-hydraulic serve testing machine. The strain of U-shaped tie bar and thin-walled steel are tested, and then the whole curve of compression process is obtained. The results show that the U-shaped tie bar has a very good role in bonding, and has good effects on improving buckling mode and the ductility of the components significantly. Concrete-filled thin-walled square steel tube short column fixed U-shaped tie bar has advantages on stronger post- deformability and more applicable to configuration compared with existing research achievements, and can provide a reference for engineering design.

• Periodical: Applied Mechanics and Materials (Volumes 94-96)
• Pages: 962-969
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.94-96.962
• Online since: September 2011
• Authors: Hai Chao Wang, Xi Quan Xu, Li Jun Zhou, Hong Ying Zhang, Feng Lian Yang
• Keywords: Built-in U-Shaped Tie Bar, Concrete-Filled Thin-Walled Square Steel Tube Short Columns, Ductility

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