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Steel and Composite Structures
  Volume 12, Number 3, March 2012 , pages 183-205

Behavior and design of steel I-beams with inclined stiffeners
Yang Yang and Eric M. Lui

    This paper presents an investigation of the effect of inclined stiffeners on the load-carrying capacity of simply-supported hot-rolled steel I-beams under various load conditions. The study is carried out using finite element analysis. A series of beams modeled using 3-D solid finite elements with consideration of initial geometric imperfections, residual stresses, and material nonlinearity are analyzed with and without inclined stiffeners to show how the application of inclined stiffeners can offer a noticeable increase in their lateral-torsional buckling (LTB) capacity. The analysis results have shown that the amount of increase in LTB capacity is primarily dependent on the location of the inclined stiffeners and the lateral unsupported length of the beam. The width, thickness and inclination angle of the stiffeners do not have as much an effect on the beam
Key Words
    steel design; I-beams; inclined stiffeners; lateral-torsional instability; finite element analysis
Department of Civil and Environmental Engineering, Syracuse University, Syracuse, NY 13244-1240, U.S.A.

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