DOI QR코드

DOI QR Code

Behavioral Characteristics and Energy Dissipation Capacity of Short Coupling Beams with Various Reinforcement Layouts

다양한 배근상세를 갖는 짧은 연결보의 주기거동 특성과 에너지소산능력의 평가

  • Published : 2008.04.30

Abstract

The cyclic behavior and energy dissipation mechanism of short coupling beams with various reinforcement layouts were studied. For numerical analysis of coupling beams, nonlinear truss model was used. The results of numerical analysis showed that the coupling beams with conventional reinforcement layout showed pinched cyclic behavior without significant energy dissipation, whereas the coupling beams with diagonal reinforcement exhibited stable cyclic behavior without pinching. The energy dissipation of the coupling beams was developed mainly by diagonal reinforcing bars developing large plastic strains rather than concrete which is a brittle material Based on this result, simplified equations for evaluating the energy dissipation of coupling beams were developed. For verification, the predicted energy dissipation was compared with the test results. The results showed that the simplified equations can predict the energy dissipation of short coupling beams with shear span-to-depth ratio less than 1.25 with reasonable precision, addressing various design parameters such as reinforcement layout, shear span-to-depth ratio, and the magnitude of inelastic displacement. The proposed energy equations can be easily applied to performance-based seismic evaluation and design of reinforced concrete structures and members.

References

  1. Paulay, T., "Coupling Beams of Reinforced Concrete Shear Walls", Journal of the Structural Division, ASCE, Vol.97 No.3, 1971, pp.843-862
  2. Paulay, T. and Binney, J. R, Diagonally Reinforced Coupling Beams, Special Publication SP-42, American Concrete Institute, Detroit, Michigan, 1974, pp.579-598
  3. Galano, L. and Vignoli, A., "Seismic Behavior of Short Coupling Beams with Different Reinforcement Layouts", ACI Structural Journal, Vol.97 No.6, 2000, pp.876-885
  4. Shimazaki, K., "De-bonded Diagonally Reinforced Beam for Good Repairability", Proceedings of the 13th World Conference on Earthquake Engineering, Vancouver, Canada, 2004, Paper No.3173
  5. Tegos, I. A. and Penelis, G. Gr., "Seismic Resistance of Short Columns and Coupling Beams Reinforced with Inclined Bars", ACI Structural Journal, Vol.85 No.1, 1988, pp.82-88
  6. Tassios, T. P., Morreti, M., and Bezas, A., "On the Behavior and Ductility of Reinforced Concrete Coupling Beams of Shear Walls", ACI Structural Journal, Vol.93 No.6, 1996, pp.711-720
  7. American Concrete Institute, Building Code Requirements for Structural Concrete, ACI 318-05 and Commentary (ACI 318R-05), Farmington Hills, Michigan, USA, 2005
  8. Applied Technology Council (ATC), Seismic Evaluation and Retrofit of Concrete Buildings, ATC-40 Report, Applied Technology Council, Redwood City, California, 1996
  9. Applied Technology Council (ATC), Improvement of Nonlinear Static Seismic Analysis Procedures, FEMA 440 Report, Federal Emergency Management Agency, Washington, DC, 2005
  10. American Society of Civil Engineers (ASCE), Prestandard and Commentary for the Seismic Rehabilitation of Buildings, FEMA 356 Report, Federal Emergency Management Agency, Washington, DC, 2000
  11. American Society of Civil Engineers, NEHRP Guidelines for the Seismic Rehabilitation of Buildings, FEMA 273 report, Federal Emergency Management Council, Washington, DC, 1997
  12. Priestley, M. J. N., "Performance Based Seismic Design", Proceedings, 12th World Conference on Earthquake Engineering, Auckland, New Zealand, 2000
  13. Park, H. and Eom, T., "Truss Model for Nonlinear Analysis of RC Members Subject to Cyclic Loading", Journal of Structural Engineering, ASCE, Vol.133, No.10, 2007
  14. Park, H. and Eom, T., "A Simplified Method for Estimating the Amount of Energy Dissipated by Flexure-Dominated Reinforced Concrete Members for Moderate Cyclic Deformations", Earthquake Spectra, Vol.22 No.3, 2006, pp.1351-1363
  15. Sinha, B. P., Gerstle, K. H., and Tulin, L. G,. "Stress-Strain Relations for Concrete under Cyclic Loading", ACI Journal, Proceedings, Vol.61, No.2, 1964, pp.195-212
  16. Ishikawa, I. and Kimura, H., "Experimental Study on Seismic Behavior of R/C Diagonally Reinforced Short Beams", Proceedings of the 11th World Conference on Earthquake Engineering, Paper No.1386, Acapulco, Mexico, 1996
  17. Kanakubo, T., Fujisawa, M., Sako, N., and Sonobe, Y., "Ductility of Short Span Beams", Proceedings of the 11th World Conference on Earthquake Engineering, Paper No.1369, Acapulco, Mexico, 1996