A STRESS-STRAIN RELATION OF JOINTS CONNECTING CONCRETE-FILLED PVC TUBE COLUMNS WITH CORE STEEL TUBES WRAPPED WITH CFRP STRIPS AND REINFORCED CONNCRETE BEAMS

YU Feng; LI Xu; LI Dongang

doi:10.13204/j.gyjzG21032205

Volume 51 Issue 11

Mar. 2022

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YU Feng, LI Xu, LI Dongang. A STRESS-STRAIN RELATION OF JOINTS CONNECTING CONCRETE-FILLED PVC TUBE COLUMNS WITH CORE STEEL TUBES WRAPPED WITH CFRP STRIPS AND REINFORCED CONNCRETE BEAMS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(11): 178-185. doi: 10.13204/j.gyjzG21032205

Citation:

YU Feng, LI Xu, LI Dongang. A STRESS-STRAIN RELATION OF JOINTS CONNECTING CONCRETE-FILLED PVC TUBE COLUMNS WITH CORE STEEL TUBES WRAPPED WITH CFRP STRIPS AND REINFORCED CONNCRETE BEAMS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(11): 178-185. doi: 10.13204/j.gyjzG21032205

Citation:

YU Feng, LI Xu, LI Dongang. A STRESS-STRAIN RELATION OF JOINTS CONNECTING CONCRETE-FILLED PVC TUBE COLUMNS WITH CORE STEEL TUBES WRAPPED WITH CFRP STRIPS AND REINFORCED CONNCRETE BEAMS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(11): 178-185. doi: 10.13204/j.gyjzG21032205

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A STRESS-STRAIN RELATION OF JOINTS CONNECTING CONCRETE-FILLED PVC TUBE COLUMNS WITH CORE STEEL TUBES WRAPPED WITH CFRP STRIPS AND REINFORCED CONNCRETE BEAMS

doi: 10.13204/j.gyjzG21032205

School of Civil and Architectural Engineering, Anhui University of Technology, Maanshan 243000, China

Received Date: 2021-03-22
Available Online: 2022-03-29

Abstract

Abstract

Axial compression tests for 9 joints of PVC tube columns with core steel tubes wrapped with CFRP strips and reinforced conncrete beams were conducted, so as to study their failure modes and stress-strain relations, the effects of joint height, the length of core steel tubes, the steel proportions of core steel tubes, and the stirrup ratios of joints were studied. The experimental results showed that the concrete of joint zones was crushed and destroyed, and the PVC-CFRP tubular confined concrete column was not damaged. When the tensile strain of the joint concrete reached the ultimate tensile strain, the stress-strain curves of the joints deviated from linear growth. The gradients of the stress-strain curves increased with the increase of the stirrup ratios in joints and the steel proportion of core steel tubes increased or with the decrease of the joint height. Based on Mander's model, an accurate model for estimating the stress-strain relations of the joints was constructed, and it agreed well with test data.
- PVC-CFRP confined concrete,
- beam-column joint,
- core steel tube,
- stress-strain relation

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References(22)

References

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