Analysis of material non-linearity of steel girders subjected to patch loading

Abstract

Subject reviewThe paper presents an analysis of behaviour of plate girders (welded steel I girders) under patch loading. Concentrated or uniformly distributed loading on a short length of the flange, and in the plane of web is known as patch loading. Behaviour of the girder in non-linear area, as well as the ultimate load capacity, which is manifested by buckling in the loaded zone were analysed. Girder modelling was performed in ANSYS Workbench 15 software [1]. In accordance with the standing regulations EN 1993-1-5 [2] and BSK 07 [3], in the course of the numerical analysis, six different material models were employed. The obtained results were compared to the experimentally obtained results. Keywords: material nonlinearity; patch loading; steel girders; ultimate load capacity Analiza nelinearnosti materijala limenih nosača podvrgnutih lokalnom opterećenjuPregledni članak U radu se daje analiza ponašanja limenih nosača (nosači od zavarenog čelika I) pod lokalnim opterećenjem. Koncentrirano ili jednoliko raspoređeno opterećenje na maloj udaljenosti od prirubnice i u ravnini mreže, poznato je kao lokalno opterećenje (patch loading). Analiziralo se ponašanje nosača u nelinearnom području kao i učinak kritičnog opterećenja, koji se manifestira izvijanjem. Za modeliranje nosača primijenjen je softver ANSYS

Stress Analysis of Steel Plate Girders Subjected to Patch Loading in Elastoplastic Domain

“…Both geometric and material non-linearities appear and they influence the behavior of the girder. This paper represents a continuation of the research presented in [1].…”

“…It is assumed that taking of those initial geometrical imperfections does not produce considerably better results, so they can be ignored in this case in the numerical modeling. The following must be emphasized: during numerical simulations of the model, the form, character and flow of deformation development and buckling are identical as in the experiment, and for each sample with which the comparison was made, too, which is presented in the paper [1].…”

“…The modulus of elasticity of material is E=210 MPa and the Poisson's coefficient is υ = 0.3. Based on von-Mises condition in the frame of the theory of plasticity we use material models on the isotropic rule (for more information, see [1]).…”

“…The state of stresses for girder A1. Ultimate load is 178,174 kN [1] The remaining cases are treated similarly. Stress state for the A 2 girder is presented in Fig.…”