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Frontiers of Structural and Civil Engineering

, Volume 13, Issue 6, pp 1474–1494 | Cite as

Investigation of the interior RC beam-column joints under monotonic antisymmetrical load

  • Fei Gao
  • Zhiqiang Tang
  • Biao HuEmail author
  • Junbo Chen
  • Hongping Zhu
  • Jian Ma
Research Article
  • 29 Downloads

Abstract

The paper presents numerical findings of reinforced concrete interior beam-column joints under monotonic antisymmetrical load. The finite element models considered compression and tension damage were calibrated by test results in terms of the load-displacement, failure modes, and strains of longitudinal steel. The emphasis was put on studying the effects of hoop reinforcement ratio in joint core and the axial compression ratio on the responses of the joints. The results show that, in addition to the truss and strut-and-tie mechanisms, the confinement mechanism also existed in the joint core. A certain amount of stirrup is not only able to enhance the confinement in joint core, undertake a part of shear force and thus to increase the shear capacity, prevent the outward buckling of steel bars in column, improve the stress distribution in joint core, delay cracking and restrain the propagation of cracks, but also to increase the yield load, decrease the yield displacement of beam and improve the joint ductility. However, excessive horizontal stirrups contribute little to the joint performance. In a certain range, larger axial compression ratio is beneficial for the joint mechanical behavior, while it is negative when axial compression ratio is too large.

Keywords

RC beam-column joint reinforcement ratio in joint core axial compression ratio finite element test 

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Notes

Acknowledgements

The work described in this paper was supported by the National Key Research & Development Plan of China (No. 2016YFC0802002), and Key Interdiscipline Research Plan of Huazhong University of Science and Technology (No. 2016JCTD113).

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Copyright information

© Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Fei Gao
    • 1
  • Zhiqiang Tang
    • 1
  • Biao Hu
    • 2
    Email author
  • Junbo Chen
    • 3
  • Hongping Zhu
    • 1
  • Jian Ma
    • 1
  1. 1.School of Civil Engineering and MechanicsHuazhong University of Science and TechnologyWuhanChina
  2. 2.Guangdong Provincial Key Laboratory of Durability for Marine Civil EngineeringShenzhen UniversityShenzhenChina
  3. 3.Department of Civil and Environmental EngineeringThe Hong Kong Polytechnic UniversityHong KongChina

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