Vol. 10, No. 3, pp. 351-371 (2014)
SEISMIC BEHAVIOR OF THROUGH-DIAPHRAGM CONNECTIONS BETWEEN CFRT COLUMNS AND
STEEL BEAMS-EXPERIMENTAL STUDY
Ying Qin1, Zhihua Chen2,*, Xiaodun Wang3 and Ting Zhou4
1 Graduate Research Assistant, Department of Civil Engineering, Tianjin University, Tianjin, China, and Visiting Research Scholar, Department of Civil Engineering, Johns Hopkins University, Baltimore, MD, USA
2 Professor, Key Laboratory of Coast Civil Structure Safety of China Ministry of Education, Tianjin University,
Tianjin, China, and Department of Civil Engineering, Tianjin University, Tianjin, China
3 Associate Professor, Department of Civil Engineering, Tianjin University, Tianjin, China
4 PhD, Department of Civil Engineering, Tianjin University, Tianjin, China
*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 1 August 2013; Revised: 18 September 2013; Accepted: 23 September 2013
DOI:10.18057/IJASC.2014.10.3.6
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ABSTRACT
This paper is an extension study to an experimental program involving one traditional and three novel through-diaphragm connections between concrete-filled rectangular tubular columns and steel H-beams. The proposed connection types utilize tapered diaphragm or triangular plates at the end of the beam to improve the seismic performance of traditional through-diaphragm connections. Based on the experimental results, the lateral force versus beam-column deformation response was assessed and the shear force versus shear distortion relationship in the panel zone was evaluated. It was observed that the improvement in connection details significantly enhanced the rotation capacity and shear stiffness. The deformation of the connections was also analyzed in terms of the contribution of the column, the beam, and the joint. In addition, the force transfer mechanism in the connections was investigated by analysis of the strain distribution The test results indicate that the proposed through-diaphragm connections are able to alleviate the stress concentration in the load transfer path and exhibit better seismic behavior.
As a result, it can be concluded that the proposed connections are more suitable for applications in moment resisting frames in seismic regions.
KEYWORDS
Through-diaphragm connections, Concrete-filled rectangular tubular column, Seismic performance, Experimental behavior, Strain distribution
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