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Karma Hissey Lepcha,Allan Lambor Marbaniang,M. Longshithung Patton,Aarti Khyriemmujat 한국강구조학회 2020 International Journal of Steel Structures Vol.20 No.3
The fl exural behaviour of lean duplex stainless steel tubular beams with web openings is presented. A fi nite element study is carried out on lean duplex stainless steel sections with web openings to determine the eff ects of the perforations on the bending capacity, deformed shapes and local buckling characteristics. The study also aims in particular for a comparison between sections having circular or extended openings with a wide range of section slenderness. The bending capacities from the fi nite element results are also compared with the American specifi cation, European specifi cation along with direct strength method. Both ASCE and EN can give a good prediction of the design strengths, however, the direct strength method showed unconservative predictions. Modifi cations have been proposed to both the ASCE specifi cation and the direct strength method for LDSS sections with web openings.