Vol. 18, No. 1, pp. 506-516 (2022)
EXPERIMENTAL AND NUMERICAL INVESTIGATION ON SEISMIC
PERFORMANCE OF RING-BEAM CONNECTION TO GANGUE CONCRETE
FILLED STEEL TUBULAR COLUMNS
Chen Fang 1, Guo-Chang Li 2, Lei Zhang 3, 4, * and Zhi-Jian Yang 2
1 Midwest Roadside Safety Facility, University of Nebraska-Lincoln, Lincoln, Nebraska 68583, USA
2 School of Civil Engineering, Shenyang Jianzhu University, Shenyang, Liaoning 110168, China
3 Lecturer, Department of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212100, China
4 Postdoctor, Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 14 October 2020; Revised: 1 July 2021; Accepted: 4 July 2021
DOI:10.18057/IJASC.2022.18.1.9
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ABSTRACT
This paper presents an investigation on seismic performance of a ring-beam connection that is used to connect reinforced gangue concrete (RGC) beam to coal-gangue concrete-filled steel tubular (GCFST) column. Two specimens, including an interior connection with two beams and an exterior connection with one beam, were designed and fabricated for experimental tests under full-reversing cyclic loads at beam ends. In addition, finite element models which corresponded to tested specimens were developed using ABAQUS to conduct numerical simulations of the composite connection subjected to the combined axial and cyclic loads. The feasibility of the developed model to predict failure modes and load-deformation response of the connection was validated by comparing with test results. The response of the ring-beam connection to cyclic loads was examined with respects to the load-bearing capacity, deformation resistance, stiffness and strength degradation, ability to dissipate energy in a seismic event, and ductility. With numerical models, parametric analysis was completed to evaluate the influences of material and structural parameters on connection resistance against cyclic loads. Based on the results of parametric studies, a restoring force model of skeleton curve for the ring-beam connection was developed in terms of ultimate capacity and corresponding deformation. The results provided practical suggestions for the application of ring-beam connection to GCFST column in the projects.
KEYWORDS
Column-beam connection, Gangue concrete filled steel tube, Ring-beam connection, Seismic behavior, Finite element analysis, Full-scale test
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