Structural Engineering and Mechanics

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Studies on seismic performance of the new section steel beam-wall connection joint

  • Weicheng Su (School of Civil Engineering, Guangzhou University) ;
  • Jian Liu (School of Civil Engineering, Guangzhou University) ;
  • Changjiang Liu (School of Civil Engineering, Guangzhou University) ;
  • Chiyu Luo (Guangdong Architectural Design & Research Institute Co. LTD) ;
  • Weihua Ye (School of Civil Engineering, Guangzhou University) ;
  • Yaojun Deng (School of Civil Engineering, Guangzhou University)
  • Received : 2023.05.12
  • Accepted : 2023.11.21
  • Published : 2023.12.10
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Abstract

This paper introduces a new hybrid structural connection joint that combines shear walls with section steel beams, fundamentally resolving the construction complexity issue of requiring pre-embedded connectors in the connection between shear walls and steel beams. Initially, a quasi-static loading scheme with load-deformation dual control was employed to conduct low-cycle repeated loading experiments on five new connection joints. Data was acquired using displacement and strain gauges to compare the energy dissipation coefficients of each specimen. The destruction process of the new connection joints was meticulously observed and recorded, delineating it into three stages. Hysteresis curves and skeleton curves of the joint specimens were plotted based on experimental results, summarizing the energy dissipation performance of the joints. It's noteworthy that the addition of shear walls led to an approximate 17% increase in the energy dissipation coefficient. The energy dissipation coefficients of dog-bone-shaped connection joints with shear walls and cover plates reached 2.043 and 2.059, respectively, exhibiting the most comprehensive hysteresis curves. Additionally, the impact of laminated steel plates covering composite concrete floors on the stiffness of semi-rigid joint ends under excessive stretching should not be disregarded. A comparison with finite element analysis results yielded an error of merely 2.2%, offering substantial evidence for the wide-ranging application prospects of this innovative joint in seismic performance.

Keywords

Acknowledgement

This research work was supported by Natural Science Foundation of China (51878586), Chongqing Technology Innovation and Application Development Special General Project (cstc2020jscx-msxmX0084), Chongqing Construction Science and Technology Plan Key Project (Urban Science 2021, No. 1-8), Guangzhou Science and Technology Project (202201010750).

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