Computers and Concrete

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Seismic performance of self-sustaining precast wide beam-column connections for fast construction

  • Wei Zhang (Department of Architectural Engineering, Chungbuk National University) ;
  • Seonhoon Kim (Department of Architectural Engineering, Chungbuk National University) ;
  • Deuckhang Lee (Department of Architectural Engineering, Chungbuk National University) ;
  • Dichuan Zhang (Department of Civil and Environmental Engineering, Nazarbayev University) ;
  • Jong Kim (Department of Civil and Environmental Engineering, Nazarbayev University)
  • Received : 2023.06.02
  • Accepted : 2023.07.13
  • Published : 2023.09.25
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Abstract

Fast-built construction is a key feature for successful applications of precast concrete (PC) moment frame system in recent construction practices. To this end, by introducing some unique splicing details in precast connections, especially between PC columns including panel zones, use of temporary supports and bracings can be minimized based on their self-sustaining nature. In addition, precast wide beams are commonly adopted for better economic feasibility. In this study, three self-sustaining precast concrete (PC) wide beam-column connection specimens were fabricated and tested under reversed cyclic loadings, and their seismic performances were quantitatively evaluated in terms of strength, ductility, failure modes, energy dissipation and stiffness degradation. Test results were compared with ASCE 41-17 nonlinear modeling curves and its corresponding acceptance criteria. On this basis, an improved macro modeling method was explored for a more accurate simulation. It appeared that all the test specimens fully satisfy the acceptance criteria, but the implicit joint model recommended in ASCE 41-17 tends to underestimate the joint shear stiffness of PC wide beam-column connection. While, the explicit joint model along with concentrated plastic hinge modeling technique is able to present better accuracy in simulating the cyclic responses of PC wide beam-column connections.

Keywords

Acknowledgement

This work was supported by a funding for the academic research program of Chungbuk National University in 2023. Also, this work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. RS-2023-00209647). Note that this study was conducted during visiting research period of the corresponding author in School of Engineering and Digital Sciences at Nazarbayev University.

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