چكيده به لاتين
After the collapse of the World Trade Center towers, the investigation of the building resistance and providing the safety of residents in case of fire has attracted the attention of engineers more than ever. In this regard, similar to buildings, gas and liquid containment structures, vehicles, planes, and vessel fuselages are examples of engineering usage which need to be designed against fire. Therefore, regarding the importance of the issue and its application in the industry, it is necessary to investigate the behavior of the plates and girders against fire. In this research, the behavior of plates and girders under the pure shear and moment-shear (M-V) interaction at both ambient and elevated temperatures were investigated by theoretical and numerical methods, separately. In order to consider the effect of effective parameters on the yield locus of M-V interaction, numerical parametric models was generated in ABAQUS software and the effect of factors including the material properties, loading, boundary condition, aspect ratio, initial geometrical imperfection, flange-to-web stiffness ratio, and web plate slenderness was investigated. Then, considering the maximum reduction effect of initial geometrical imperfection on the shear strength of the compact plates, theoretical equations have been extracted to achieve the M-V interaction curve without considering shear buckling for the non-composite homogeneous and hybrid steel plate I-girders at both ambient and elevated temperatures. The proposed equations were corroborated with 6 existing experimental data, and 60 finite element analysis results and those of EN 1993-1-5. Comparing the results corroborated the capability of the model to predict the M-V interaction phenomenon.
