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Steel and Composite Structures
  Volume 13, Number 3, September 2012 , pages 225-238

Experimental study on laterally restrained steel columns with variable I cross sections
Ionel-Mircea Cristutiu*, Daniel Luis Nunes and Adrian Ioan Dogariu

    Steel structural elements with web-tapered I cross section, are usually made of welded thin plates. Due to the nonrectangular shape of the element, thin web section may be obtained at the maximum cross section height. The buckling strength is directly influenced by lateral restraining, end support and initial imperfections. If no lateral restraints, or when they are not effective enough, the global behaviour of the members is characterized by the lateral torsional mode and interaction with sectional buckling modes may occur. Actual design codes do not provide a practical design approach for this kind of elements. The paper summarizes an experimental study performed by the authors on a relevant number of elements of this type. The purpose of the work was to evaluate the actual behaviour of the web tapered beam-columns when applying different types of lateral restraints and different web thickness
Key Words
    tapered web; experimental tests; finite element; lateral restraints; steel beam-columns; slender elements.
Ionel-Mircea Cristutiu : Department of Architecture, PUT, Timisoara-300223, Romania
Daniel Luis Nunes and Adrian Ioan Dogariu : Department of Steel Structure and Structural Mechanics, PUT, Timisoara-300224, Romania

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