Seismic behavior tests of square reinforced concrete-filled steel tube columns connected to RC beam joints
This paper proposes a joint system that connects the thin-walled square reinforced concrete–filled steel tube (RCFST) column to RC beams at both sides of the joint. In order to delay the local buckling of square steel tubes with high width-to-thickness ratio and enhance confinement effect on infille...
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sg-ntu-dr.10356-1514042021-06-23T09:34:49Z Seismic behavior tests of square reinforced concrete-filled steel tube columns connected to RC beam joints Gan, Dan Zhou, Zheng Zhou, Xuhong Tan, Kang Hai School of Civil and Environmental Engineering Engineering::Civil engineering Reinforced Concrete-filled Steel Tube RC Beam This paper proposes a joint system that connects the thin-walled square reinforced concrete–filled steel tube (RCFST) column to RC beams at both sides of the joint. In order to delay the local buckling of square steel tubes with high width-to-thickness ratio and enhance confinement effect on infilled concrete, diagonal stiffeners were welded to adjacent sides of the internal square steel tube and longitudinal bars were embedded in the square RCFST columns. Four RCFST joints with internal diaphragms were tested up to a large drift ratio of 6.7% under combined axial compression and reversed cyclic loading. All four specimens were designed according to the strong-column-weak-beam concept, and the strong-joint-weak-member seismic design philosophy. The cross-sectional dimensions of the RCFST column were 300×300 mm. The dimensions of the beam cross section were 200×350 mm and high-strength steel rebars (600 MPa) were adopted in the RC beams. The width-to-thickness ratio of the square joint tube and the level of axial load in the column were two important parameters to be studied. Two types of failure mode, i.e., beam flexural failure and beam flexural failure with bond failure, were observed. Both failure modes were ductile and the joints showed excellent seismic performance under cyclic loading. Based on the test results, some design considerations for the joints were recommended. 2021-06-23T09:34:49Z 2021-06-23T09:34:49Z 2019 Journal Article Gan, D., Zhou, Z., Zhou, X. & Tan, K. H. (2019). Seismic behavior tests of square reinforced concrete-filled steel tube columns connected to RC beam joints. Journal of Structural Engineering, 145(3), 04018267-. https://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002280 0733-9445 https://hdl.handle.net/10356/151404 10.1061/(ASCE)ST.1943-541X.0002280 2-s2.0-85059523241 3 145 04018267 en Journal of Structural Engineering © 2018 American Society of Civil Engineers. All rights reserved. |
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Engineering::Civil engineering Reinforced Concrete-filled Steel Tube RC Beam Gan, Dan Zhou, Zheng Zhou, Xuhong Tan, Kang Hai Seismic behavior tests of square reinforced concrete-filled steel tube columns connected to RC beam joints |
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This paper proposes a joint system that connects the thin-walled square reinforced concrete–filled steel tube (RCFST) column to RC beams at both sides of the joint. In order to delay the local buckling of square steel tubes with high width-to-thickness ratio and enhance confinement effect on infilled concrete, diagonal stiffeners were welded to adjacent sides of the internal square steel tube and longitudinal bars were embedded in the square RCFST columns. Four RCFST joints with internal diaphragms were tested up to a large drift ratio of 6.7% under combined axial compression and reversed cyclic loading. All four specimens were designed according to the strong-column-weak-beam concept, and the strong-joint-weak-member seismic design philosophy. The cross-sectional dimensions of the RCFST column were 300×300 mm. The dimensions of the beam cross section were 200×350 mm and high-strength steel rebars (600 MPa) were adopted in the RC beams. The width-to-thickness ratio of the square joint tube and the level of axial load in the column were two important parameters to be studied. Two types of failure mode, i.e., beam flexural failure and beam flexural failure with bond failure, were observed. Both failure modes were ductile and the joints showed excellent seismic performance under cyclic loading. Based on the test results, some design considerations for the joints were recommended. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Gan, Dan Zhou, Zheng Zhou, Xuhong Tan, Kang Hai |
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Article |
author |
Gan, Dan Zhou, Zheng Zhou, Xuhong Tan, Kang Hai |
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Gan, Dan |
title |
Seismic behavior tests of square reinforced concrete-filled steel tube columns connected to RC beam joints |
title_short |
Seismic behavior tests of square reinforced concrete-filled steel tube columns connected to RC beam joints |
title_full |
Seismic behavior tests of square reinforced concrete-filled steel tube columns connected to RC beam joints |
title_fullStr |
Seismic behavior tests of square reinforced concrete-filled steel tube columns connected to RC beam joints |
title_full_unstemmed |
Seismic behavior tests of square reinforced concrete-filled steel tube columns connected to RC beam joints |
title_sort |
seismic behavior tests of square reinforced concrete-filled steel tube columns connected to rc beam joints |
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2021 |
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https://hdl.handle.net/10356/151404 |
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1703971210890575872 |