Steel and Composite Structures

  • 제36권4호
  • /
  • Pages.447-462
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  • 2020
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Influence of stiffeners on the performance of blind-bolt end-plate connections to CFST columns

  • Ding, Fa-xing (School of Civil Engineering, Central South University) ;
  • Pan, Zhi-cheng (School of Civil Engineering, Central South University) ;
  • Liu, Peng (School of Civil Engineering, Central South University) ;
  • Huang, Shi-jian (School of Civil Engineering, Central South University) ;
  • Luo, Liang (School of Civil Engineering and Architecture, Nanchang Hangkong University) ;
  • Zhang, Tao (School of Civil Architecture, Zhengzhou University of Aeronautics)
  • 투고 : 2019.05.16
  • 심사 : 2020.07.28
  • 발행 : 2020.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

The paper aims to investigate the mechanical mechanism and seismic effect of stiffeners in blind bolt endplate connection to CFST column. A precise 3D finite element model with considering the cyclic properties of concrete and steel materials was established, and the efficiency was validated through monotonic and cyclic test data. The deforming pattern and the seismic performance of the unstiffened and stiffened blind bolt endplate connections were investigated. Then a parametric analysis was conducted to analyze the contribution of stiffeners and the joint working behaviors with endplate under cyclic load. The joint stiffness classifications were compared and a supplement stiffness classification method was proposed, and the energy dissipation ability of different class connections were compared and discussed. Results indicated that the main deformation pattern of unstiffened blind bolt endplate connections was the local bending of end plate. The vertical stiffeners can effectively alleviate the local bending deformation of end plate. And influence of stiffeners in thin endplate and thick endplate was different. Based on the stiffness of external diaphragm welded connection, a more detailed rigidity classification was proposed which included the pin, semi-rigid, quasi-rigid and rigid connection. Beam was the main energy dissipation source for rigid connection. For the semi-rigid and quasi-rigid connection, the extended endplate, stiffeners and steel beam would all participate in the energy dissipation.

키워드

과제정보

This research is supported by the National Key Research Program of China, Grant No. 2017YFC0703404, and the National Natural Science Foundation of China, Grant No.51578548. Science Fund for Distinguished Young Scholars of Hunan, Grant No. 2019JJ20029.

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