DOI QR코드

DOI QR Code

고온 강구조 압축재의 좌굴 강도에 관한 연구

A Study on Buckling Strengths for Steel Compression Members at High Temperatures

  • 최현식 (계명대학교 건축공학전공)
  • Choi, Hyun-Sik (Dept. of Architectural Engineering, Keimyung University)
  • 투고 : 2019.04.30
  • 심사 : 2019.05.08
  • 발행 : 2019.06.15

초록

The high-temperature properties of mild steels were studied by comparing the test results of Kwon and the yield strength, tangent modulus predicted by the design provisions of ASCE and Eurocode(EC3). The column strengths for steel members at high temperatures were determined by the elastic and inelastic buckling strengths according to elevated temperatures. The material properties at high temperatures should be used in the strength evaluations of high temperature members. The buckling strengths obtained from the AISC, EC3 and approximate formula proposed by Takagi et al. were compared with ones calculated by the material nonlinear analysis using the EC3 material model. The newly simplified formulas for yield stress, tangent modulus, proportional limit and buckling strength which were proposed through a comparative study of the material properties and buckling strengths. The buckling strengths of proposed formulas were approximately equivalent to ones obtained from the formulas of Takagi et al. within 4%. They were corresponded to the lower bound values among the buckling strengths calculated by the design formulas and inelastic buckling analysis.

키워드

참고문헌

  1. Bazant, Z. P., & Cedolin, L., "Stability of structures : elastic, inelastic, fracture, and damage theories", Oxford University Press, 1991.
  2. Kwon, I. K., "Derivation of the Mechanical Properties of Structural Steels at High Temperature", Journal of Korean Institute of Fire Science & Engineering, Vol.21, No.3, pp.47-55, 2007
  3. Kim, S. Y., Chu, D. S., Lee, H. D., & Shin, K. J., "Mechanical Properties of Structural Steel at Elevated Temperature", Journal of Korean Society of Steel Construction, Vol.30, No.5, pp.257-264, 2018 https://doi.org/10.7781/kjoss.2018.30.5.257
  4. European Committee for Standardization, Eurocode 3: Design of Steel Structures- Part 1. 2: General Rules-Structural Fire Design, EN 1993-1-2, Brussels, 2005
  5. ASCE, "Structural Fire Protection", ASCE Committee on Fire Protection, Manual No. 78, Reston, 1992
  6. Kim, J. E., Kang, S. D., & Choi, H. S., "Failure Temperatures of Steel H-Section Columns under Elevated Temperatures", International Journal of Steel Structures, Vol.14, No.4, pp.821-829, 2014 https://doi.org/10.1007/s13296-014-1213-z
  7. Kodur, V., Dwaikat, M., & Fike, R., "High-Temperature Properties of Steel for Fire Resistance Modeling of Structures", Journal of Materials in Civil Engineering, Vol.22, No.5, pp.423-434, 2010 https://doi.org/10.1061/(ASCE)MT.1943-5533.0000041
  8. Takagi, J., & Deierlein, G. G., "Strength design criteria for steel members at elevated temperatures", Journal of Constructional Steel Research, Vol.63, No.8, pp.1036-1050, 2007 https://doi.org/10.1016/j.jcsr.2006.10.005
  9. American Institute of Steel Construction, Specification for Structural Steel Buildings, USA, 2005
  10. Bleich, F., Ramsey, L. B., & Bleich, H. H., "Buckling strength of metal structures", McGraw-Hill, pp.1-508, 1952.
  11. Kim, J. E. (2014). A Study on the Resistance Forces and the Failure Temperature of H-Shaped Steel Compressive Members by Elevated Temperature (Doctoral dissertation). Keimyung University, Republic of Korea.