STUDY ON SOME KEY PROBLEMS RELATED TO CRANE BEAM-RAIL SYSTEM UNDER WHEEL PRESSURE

Three typical problems of the crane beam-rail system under wheel pressure were studied using ANSYS and the corresponding conclusions were given． Firstly，the local compressive stress on the edge of the crane beam web in discontinuous rail case was analyzed numerically． A formula for the maximum bearing stress amplification factor corresponding to the case of track discontinuity was brought up． Secondly，the contribution of rail flexural rigidity to the elastic stability of the web under wheel pressure was studied． It was found that the function of the rail was limited only to diffuse the stress; if the stress distribution on the web was given，the flexural rigidity of the upper edge rail had no impact on the web stability． Finally，the stability analysis of web without moment influence was conducted． And an approximate formula was proposed for elastic buckling coefficient of web under wheel pressure．