SHS and RHS stainless steel slender members loaded by compression and bending interaction

Building up Efficient and Sustainable Transport Infrastructure 2017

idlický, Betislav^1 ; Jandera, Michal^1

Department of Steel and Timber Structures, Czech Technical University in Prague, Thákurova 7, Prague

166 29, Czech Republic^1

关键词: Applied bending moments;    Austenitic stainless;    Axial compressive forces;    Material non-linearity;    Moment distribution;    Nonlinear materials;    Numerical parametric studies;    Square hollow sections;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/236/1/012064/pdf
DOI  :  10.1088/1757-899X/236/1/012064

来源: IOP

【 摘 要 】

Behaviour of stainless steel slender members loaded by interaction of axial compressive force and bending moment is investigated in this research. Square hollow sections (SHS) made of austenitic stainless steel grade are considered. An initial numerical parametric study in FE software Abaqus is given and its results are compared to the existing design procedures and design standard rules. The investigated parameters are mainly the column slenderness, section slenderness, ratio between the applied bending moment and axial compressive force and the moment distribution along the member. The necessity of having additional design rules for stainless steels is firstly demonstrated on the values of interaction factors kywhich are significantly higher for stainless steel members due to the material nonlinearity with decreased stiffness even at lower stress levels. As an alternative, the General Method is used for comparison to the Abaqus GMNIA model results. The limitation of the method when used for members of non-linear material behaviour is shown and a safe modification of design procedure is suggested.