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Steel and Composite Structures Volume 36, Number 5, September10 2020 , pages 533-551 DOI: https://doi.org/10.12989/scs.2020.36.5.533 |
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Seismic performance of the concrete-encased CFST column to RC beam joints: Analytical study |
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Dan-Yang Ma, Lin-Hai Han, Xiao-Ling Zhao and Wei-Biao Yang
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| Abstract | ||
| A finite element analysis (FEA) model is established to investigate the concrete-encased concrete-filled steel tubular (CFST) column to reinforced concrete (RC) beam joints under cyclic loading. The feasibility of the FEA model is verified by a set of test results, consisting of the failure modes, the exposed view of connections, the crack distributions and development, and the hysteretic relationships. The full-range analysis is conducted to investigate the stress and strain development process in the composite joint by using this FEA model. The internal force distributions of different components, as well as the deformation distributions, are analyzed under different failure modes. The proposed connections are investigated under dimensional and material parameters, and the proper constructional details of the connections are recommended. Parameters of the beam-column joints, including material strength, confinement factor, reinforcement ratio, diameter of steel tube to sectional width ratio, beam to column linear bending stiffness ratio and beam shear span ratio are evaluated. Furthermore, the key parameters affecting the failure modes and the corresponding parameters ranges are proposed in this paper. | ||
| Key Words | ||
| joint; seismic performance; concrete-encased CFST column; reinforced concrete(RC) beam; finite element analysis (FEA); full-range analysis | ||
| Address | ||
| Dan-Yang Ma and Lin-Hai Han: Department of Civil Engineering, Tsinghua University, Beijing, 100084, P.R. China Xiao-Ling Zhao: Department of Civil and Environmental Engineering, The University of New South Wales (UNSW), Sydney, NSW 2052, Australia Wei-Biao Yang: Beijing Institute of Architectural Design, Beijing 100045, P.R. China | ||