I-beam girders dimensioning with numerical modelling of local stresses in wheel-supporting flanges

Abstract

The article presents one-girder roadway structures for suspended cranes, conveyors and other machinery, as well as different ways of dimensioning them, taking into account the specifics of the state of the load acting on the lower flange of the roadway in accordance with the new standard EN15011:2011+A1:2014. In addition, an example of numerical modelling, using the finite element method, of an overhead travelling crane I-beam girder, being the roadway of a travelling hoist, is presented. The focus is primarily on local stresses occurring in the lower flange, which arise as a result of the occurrence of pressure from the wheels. In addition to the dominant stresses from general bending, the phenomenon of lower flange deflection is of great importance in terms of the final dimensions of the girder. The simulation results were compared with the results of analytical calculations.