Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
권호 표지
DOI QR코드

DOI QR Code

Experimental Study on Minimum Shear Reinforcement of Shear Walls Using 500MPa Steel Re-bars

500MPa 벽체전단철근의 최소철근량에 대한 실험적 연구

  • Received : 2016.01.05
  • Accepted : 2016.08.19
  • Published : 2016.08.30
⟨ Previous Next ⟩

Abstract

In the present study, experimental investigations were performed on nine reinforced concrete walls with a shear span to wall height ratio of 2.5 and rectangular cross sections under cyclic lateral loading. The major test parameters were the grade of shear re-bar (400MPa and 500MPa), concrete compressive strength (24MPa and 35MPa), axial load ratio (0% and 20%), failure mode (shear failure before or after flexural yielding), and horizontal shear reinforcement details (double layer and single layer). Based on the test results, the structural performances and characteristics of test specimens were investigated in terms of load-carrying capacity (shear or flexural strength), hysteretic behavior, strain distribution, lateral displacement component, and energy dissipation capacity. The test results of specimens designed to be failed in shear before flexural yielding showed that seismic performances of the walls with 500MPa re-bars (20% reduction in shear reinforcement) were almost identical to that of the walls with 400MPa re-bars. For specimens designed to be failed after flexural yielding, the specimen with single layered shear reinforcement showed almost identical strength and greater drift capacity compared to those of the specimen with double layered shear reinforcement.

Keywords

Acknowledgement

Supported by : 한국연구재단

References

  1. ACI-ASCE Committee 426. (1973). The Shear Strength of Reinforced Concrete Members, In ACI Journal Proceedings, 70(7), ACI.
  2. ACI Committee 318. (2011). Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary, American Concrete Institute, Farmington Hills, MI, 503.
  3. ACI 374.2R-13. (2013). Guide for Testing Reinforced Concrete Structural Elements under Slowly Applied Simulated Seismic Loads, American Concrete Institute.
  4. ASCE/SEI 41. (2013). Seismic Evaluation and Retrofit of Existing Buildings, American Society of Civil Engineers.
  5. Eurocode 2. (2004). Design of Concrete Structures: Part 1-1: General Rules and Rules for Buildings, British Standards Institution.
  6. Cardenas, A. E., Hanson, J. M., Corley, W. G., & Hognestad, E. (1973). Design Provisions for Shear Walls, In ACI Journal Proceedings, 70(3). ACI.
  7. Korea Concrete Institute. (2012). Code requirement for reinforced concrete structure, Korea Concrete Institute.
  8. Kabeyasawa, T. & Hiraishi, H. (1998). Test and Analyses of High-Strength Reinforced Concrete Shear Walls in Japan, ACI Structural Journal, 176, 281-310.
  9. Lefas, I. D., Kotsovos, M. D., & Ambraseys, N. N. (1990). Behavior of Reinforced Concrete Structural Walls: Strength, Deformation Characteristics, and Failure Mechanism, ACI Structural Journal, 87(1), 23-31.
  10. Park, H., Lee, J., Shin, H., & Baek, J. (2013). Cyclic Loading Test for Shear Strength of Low-rise RC Walls with Grade 550 MPa Bars, Journal of the Korea Concrete Institute, 25(6), 601-612. https://doi.org/10.4334/JKCI.2013.25.6.601
  11. Pilakoutas, K. & Elnashai, A. (1995). Cyclic behavior of reinforced concrete cantilever walls. I: Experimental results, ACI Structural Journal, 92(3), 271-281.