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Title |
Connection Performance of Steel Moment Frame with Out-of-Plane Beam Skew
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DOI |
https://doi.org/10.11112/jksmi.2022.26.2.84 |
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Keywords |
철골 모멘트접합부; 어긋난 보; 유한요소해석; 횡력저항시스템; 중간모멘트골조 Steel moment connections; Skewed beam; Finite element analysis; Lateral force resisting system; Intermediate moment frame (IMF) |
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Abstract |
This study investigated the behavior of out-of-plane skewed moment connections that were designed as IMFs, as per the Korean standards. A total of 14 finite element models were constructed with the consideration of two types (single- and double-sided connections) and four levels of skew angle (0°, 10°, 20°, and 30°). The results indicated that the skewed connections considered in this study met the acceptance criteria for IMFs given by the codes. However, the load-carrying capacities of skewed connections were decreased as the skew angle increased. For the connection with a skew angle of 30°, the peak load was noted to be 13% less and the energy dissipation capacity could be 26% less than that of non-skewed connection. In addition, because of the skewed nature, the stress distribution in the skewed beam flange near the connection was asymmetric and the stresses were concentrated on the beam inner flange. Column twisting induced by the skewed configuration was very small and negligible in the beam and column combination considered in this study.
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