International journal of steel structures (국제강구조저널)

Korean Society of Steel Construction (한국강구조학회)
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Probabilistic Strength at Serviceability Limit State for Normal and SBHS Slender Stiffened Plates Under Uniaxial Compression

  • Rahman, Mahmudur (Department of Civil and Environmental Engineering, Saitama University) ;
  • Okui, Yoshiaki (Department of Civil and Environmental Engineering, Saitama University) ;
  • Anwer, Muhammad Atif (Department of Civil and Environmental Engineering, Saitama University)
  • Received : 2017.12.14
  • Accepted : 2018.08.01
  • Published : 2018.11.30
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Abstract

Stiffened plates with high slenderness parameters show large out-of-plane deflections, due to elastic buckling, which may occur before the plates reach their ultimate strength. From a serviceability point of view, restriction of out-of-plane deflections exceeding the fabrication tolerance is of primary importance. Compressive strength at the serviceability limit state (SLS) for slender stiffened plates under uniaxial stress was investigated through nonlinear elasto-plastic finite element analysis, considering both geometric and material nonlinearity. Both normal and high-performance steel were considered in the study. The SLS was defined based on a deflection limit and an elastic buckling strength. Probabilistic distributions of the SLS strengths were obtained through Monte Carlo simulations, in association with the response surface method. On the basis of the obtained statistical distributions, partial safety factors were proposed for SLS. Comparisons with the ultimate strength of different design codes e.g. Japanese Code, AASHTO, and Canadian Code indicate that AASHTO and Canadian Code provide significantly conservative design, while Japanese Code matches well with a 5% non-exceedance probability for compressive strength at SLS.

Keywords

Acknowledgement

Supported by : The Japan Iron and Steel Federation

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