Structural Engineering and Mechanics

  • 제18권4호
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  • Pages.389-410
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  • 2004
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Improvement of the earthquake resistance of R/C beam-column joints under the influence of P-△ effect and axial force variations using inclined bars

  • Tsonos, Alexander G. (Aristotle University of Thessaloniki, Division of Structural Engineering)
  • 투고 : 2003.02.13
  • 심사 : 2004.03.24
  • 발행 : 2004.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, theoretical and experimental results are presented which were obtained during an investigation of the influence of the $P-{\Delta}$ effect that was caused by the simultaneous changing of the axial load P of the column and the lateral displacement ${\Delta}$ in the external beam-column joints. The increase or decrease of ${\Delta}$ was simultaneous with the increase or decrease of the axial compression load P and caused an additional influence on the aseismic mechanical properties of the joint. A total of 12 reinforced concrete exterior beam-column subassemblies were examined. A new model, which predicts the beam-column joint ultimate shear strength, was used in order to predict the seismic behaviour of beam-column joints subjected to earthquake-type loading plus variable axial load and $P-{\Delta}$ effect. Test data and analytical research demonstrated that axial load changes and $P-{\Delta}$ effect during an earthquake cause significant deterioration in the earthquake-resistance of these structural elements. It was demonstrated that inclined bars in the joint region were effective for reducing the unfavourable impact of the $P-{\Delta}$ effect and axial load changes in these structural elements.

키워드

참고문헌

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피인용 문헌

  1. Reinforced concrete beam–column joints with crossed inclined bars under cyclic deformations vol.37, pp.6, 2008, https://doi.org/10.1002/eqe.793
  2. Shear strength of reinforced concrete beam-column joints with crossed inclined bars vol.140, 2017, https://doi.org/10.1016/j.engstruct.2017.02.072
  3. Experimental investigation of RC beams with rectangular spiral reinforcement in torsion vol.56, 2013, https://doi.org/10.1016/j.engstruct.2013.05.003
  4. Pre-earthquake and post-earthquake retrofitting of poorly detailed exterior RC beam-to-column joints vol.109, 2016, https://doi.org/10.1016/j.engstruct.2015.11.009
  5. Seismic resistance of exterior beam-column joints with non-conventional confinement reinforcement detailing vol.30, pp.6, 2008, https://doi.org/10.12989/sem.2008.30.6.733
  6. The effects of stirrups and the extents of regions used SFRC in exterior beam-column joints vol.27, pp.2, 2007, https://doi.org/10.12989/sem.2007.27.2.223
  7. A simplified shear model for reinforced concrete elements subjected to reverse lateral loadings vol.2, pp.1, 2012, https://doi.org/10.2478/s13531-011-0055-0
  8. Shear strength criteria for design of RC beam–column joints in building codes pp.1573-1456, 2018, https://doi.org/10.1007/s10518-018-0492-8
  9. Seismic tests of RC shear walls confined with high-strength rectangular spiral reinforcement vol.24, pp.1, 2017, https://doi.org/10.12989/scs.2017.24.1.001
  10. Experimental investigations and FE simulation of exterior BCJs retrofitted with CFRP fabric vol.17, pp.4, 2004, https://doi.org/10.12989/eas.2019.17.4.337
  11. Strut-and-tie model for shear strength prediction of RC exterior beam-column joints under seismic loading vol.18, pp.4, 2020, https://doi.org/10.1007/s10518-019-00756-4