Experimental and Numerical Investigations on Seismic Performance of CFST Frame with External Diaphragm Joint
Publication: Journal of Structural Engineering
Volume 147, Issue 11
Abstract
This paper aims to investigate the seismic performance of a steel frame with an external diaphragm joint between a concrete-filled steel tube (CFST) column and H-shaped steel beam through experiments and finite-element (FE) analysis. A quasistatic test was conducted on five steel frame specimens. The parameters involved in the test were joint stiffness, beam-to-column stiffness ratio and concrete strength. Based on the experimental results, failure mode, lateral load versus displacement hysteretic curve, skeleton curve, strength and stiffness degradation effects, ductility, and energy dissipation capacity were analyzed. The experimental results show the hysteretic curves have a plump shuttle shape; the strength degradation effect and stiffness degradation effect are relatively feeble; and the ductility and energy dissipation capacity are excellent. Therefore, the tested specimens have good seismic performance. Also, this suggests that larger joint stiffness brings about superior seismic performance; a stronger column leads to higher bearing capacity as well as inferior ductility and energy dissipation capacity; and a CFST frame performs better than a hollow steel tube column frame under cyclic loads. On the basis of the experimental results, the ABAQUS software version 6.14 was adopted to establish the FE models. The applicability and accuracy of FE simulation were first verified by experimental results. Then, quantitative parametric analysis was carried out to study the effects of different parameters on seismic performance of the CFST frame with an external diaphragm joint.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The experimental work presented was carried out at Tianjin University, China. The research described in this paper was financially supported by the National Natural Science Foundation of China (Grant No. 51468061). The financial support is greatly appreciated.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 11 • November 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Dec 4, 2020
Accepted: Jul 8, 2021
Published online: Aug 28, 2021
Published in print: Nov 1, 2021
Discussion open until: Jan 28, 2022
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