DOI QR코드

DOI QR Code

Analysis of axial compression performance of BFRRAC-filled square steel tubular column

  • Xianggang Zhang (School of Intelligent Construction, Wuchang University of Technology) ;
  • Jixiang Niu (School of Civil Engineering, Henan Polytechnic University) ;
  • Wenlong Shen (School of Energy Science and Engineering, Henan Polytechnic University) ;
  • Dapeng Deng (School of Civil Engineering, Henan Polytechnic University) ;
  • Yajun Huang (School of Intelligent Construction, Wuchang University of Technology)
  • 투고 : 2023.05.13
  • 심사 : 2023.10.25
  • 발행 : 2023.11.25

초록

To make up for the performance weaknesses of recycled aggregate concrete (RAC), expand the application range of RAC, and alleviate the environmental problems caused by excessive exploitation of natural coarse aggregates (NCA), this study proposes a basalt fiber-reinforced recycled aggregate concrete (BFRRAC)-filled square steel tubular columns that combines two modification methods of steel tube and fiber, which may greatly enhance the mechanical properties of RAC. The axial compression performance for BFRRAC-filled square steel tubular columns was reported during this study. Seven specimens with different replacement ratios of recycled coarse aggregate (RCA), length-diameter ratios, along with basalt fiber (BF) contents were designed as well as fabricated for performing axial compression test. For each specimen, the whole failure process as well as mode of specimen were discovered, subsequently the load-axial displacement curve has obtained, after which the mechanical properties was explained. A finite element analysis model for specimens under axial compression was then established. Subsequently, based on this model, the factors affecting axial compression performance for BFRRAC-filled square steel tubes were extended and analyzed, after which the corresponding design suggestion was proposed. The results show that in the columns with length-diameter ratios of 5 and 8, bulging failure was presented, and the RAC was severely crushed at the bulging area of the specimen. The replacement ratio of RCA as well as BF content little affected specimen's peak load (less than 5%). As the content of BF enhanced from 0 kg/m3 to 4 kg/m3, the dissipation factor and ductility coefficients increased by 10.2% and 5.6%, respectively, with a wide range.

키워드

과제정보

This work was supported by the Funds for Establishment Project of Double First-Class Disciplines of Safety and Energy Engineering Department (AQ20230731, AQ20230736), the National Natural Science Foundation of China (52274077), the Fundamental Research Funds for the Universities of Henan Province (NSFRF220440), the Funds for Distinguished Young Scholars of Henan Polytechnic University (J2023-3) and Henan Province National Science Foundation (222300420446).

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