EXPERIMENTAL STUDY ON ASEISMIC PROPERTIES OF EARTHQUAKE-DAMAGED JOINTS FOR ASSEMBLED MONOLITHIC CONCRETE FRAMES STRENGTHENED WITH CARBON FIBER SHEETS

YANG Zhao; LING Zhihan; YE Jiaolong; LIU Kun; YANG Quan; ZHOU Xin

doi:10.13204/j.gyjzG19121615

Volume 51 Issue 7

Nov. 2021

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YANG Zhao, LING Zhihan, YE Jiaolong, LIU Kun, YANG Quan, ZHOU Xin. EXPERIMENTAL STUDY ON ASEISMIC PROPERTIES OF EARTHQUAKE-DAMAGED JOINTS FOR ASSEMBLED MONOLITHIC CONCRETE FRAMES STRENGTHENED WITH CARBON FIBER SHEETS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 185-193. doi: 10.13204/j.gyjzG19121615

Citation:

YANG Zhao, LING Zhihan, YE Jiaolong, LIU Kun, YANG Quan, ZHOU Xin. EXPERIMENTAL STUDY ON ASEISMIC PROPERTIES OF EARTHQUAKE-DAMAGED JOINTS FOR ASSEMBLED MONOLITHIC CONCRETE FRAMES STRENGTHENED WITH CARBON FIBER SHEETS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 185-193. doi: 10.13204/j.gyjzG19121615

Citation:

YANG Zhao, LING Zhihan, YE Jiaolong, LIU Kun, YANG Quan, ZHOU Xin. EXPERIMENTAL STUDY ON ASEISMIC PROPERTIES OF EARTHQUAKE-DAMAGED JOINTS FOR ASSEMBLED MONOLITHIC CONCRETE FRAMES STRENGTHENED WITH CARBON FIBER SHEETS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(7): 185-193. doi: 10.13204/j.gyjzG19121615

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EXPERIMENTAL STUDY ON ASEISMIC PROPERTIES OF EARTHQUAKE-DAMAGED JOINTS FOR ASSEMBLED MONOLITHIC CONCRETE FRAMES STRENGTHENED WITH CARBON FIBER SHEETS

doi: 10.13204/j.gyjzG19121615

1. School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China;
2. China Construction Yipin Investment & Development Co., Ltd., Wuhan 430058, China

Received Date: 2019-12-16
Available Online: 2021-11-11

Abstract

Abstract

Based on the quasi-static test, the aseismic properties of earthquake-damaged joints for assembled monolithic concrete frames strengthened with carbon fiber sheets were studied. The effects of failure modes, hysteretic curves, skeleton curves, displacement, ductility, degradation of stiffness and bearing capacity, and damage degrees on the aseismic performances of specimens reinforced by carbon fiber sheets were analyzed. On the basis of finite element simulations, the influence of different parameters on the strengthening effect, the formula for shear capacity of the core areas for reinforced joints was constructed.The results showed that the ultimate bearing capacity of joints strengthened with CFRP sheets could increase by 27.1% at most, the ultimate displacement could increase by at most 23.8%, the energy dissipation and ductility were enhanced, and the degradation of stiffness and bearing capacity for specimens were slowed down. The aseismic performances of the slightly damaged joints strengthened by CFRP sheets had been effectively improved, the moderately damaged joints of being strengthing had not been improved, but it could still be restored to the undamaged state.The shear capacity of the core area calcuatied by the theoretical formula were compared with that in tests and simulations, the errors were less than 10%.
- assembled integral frame joint,
- carbon fiber sheet reinforcement,
- pre-damage,
- aseismic performance

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References(14)

References

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