Techno Press
You logged in as Techno Press

Steel and Composite Structures
  Volume 38, Number 2, January25 2021 , pages 165-176

Axial impact behavior of confined concrete filled square steel tubes using fiber reinforced polymer
Yitian Zhang, Bo Shan, Thomas H.K. Kang and Yan Xiao

    Existing research on confined concrete filled steel tubular (CCFT) columns has been mainly focused on static or cyclic loading. In this paper, square section CCFT and CFT columns were tested under both static and impact loading, using a 10,000 kN capacity compression test machine and a drop weight testing equipment. Research parameters included bonded and unbonded fiber reinforced polymer (FRP) wraps, with carbon, basalt and glass FRPs (or CFRP, BFRP, and GFRP), respectively. Time history curves for impact force and steel strain observed are discussed in detail. Experimental results show that the failure modes of specimens under impact testing were characterized by local buckling of the steel tube and cracking at the corners, for both CCFT and CFT columns, similar to those under static loading. For both static and impact loading, the FRP wraps could improve the behavior and increase the loading capacity. To analyze the dynamic behavior of the composite columns, a finite element, FE, model was established in LS-DYNA. A simplified method that is compared favorably with test results is also proposed to predict the impact load capacity of square CCFT columns.
Key Words
    CCFT = confined concrete filled steel tube; CFT = concrete filled steel tube; CFRP = carbon fiber reinforced polymer; BFRP = basalt fiber reinforced polymer; GFRP = glass fiber reinforced polymer; LS-DYNA
Yitian Zhang: Hunan Construction Engineering Group Co., Ltd., Changsha, China;
Ministry of Education Key Laboratory of Building Safety and Energy Efficiency, Hunan University, Changsha, China
Bo Shan: Ministry of Education Key Laboratory of Building Safety and Energy Efficiency, Hunan University, Changsha, China
Thomas H.K. Kang: Department of Architecture and Architectural Engineering, Seoul National University, Korea
Yan Xiao: Zhejiang University – University of Illinois Joint Institute, Zhejiang University, International Campus, Haining, Zhejiang, China

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2023 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: