Abstract
This paper investigates the local stresses in crane runway girders with welded box section due to wheel loading. The effects of load eccentricity are studied in detail for webs with and without longitudinal stiffeners. Since current design codes only give stress formulae for I-sections, a new analytical model is presented in this paper. This extended analytical model for eccentric loads allows for consideration of the stiffness contribution of the upper flange and of the additional web supporting effect of longitudinal stiffeners, if present.Additionally, laboratory tests on a full scale crane runway girder with welded box section and corresponding finite element calculations are presented. The local stresses of both are compared with the new analytical model and with code predictions. Concentric wheel loading as well as eccentric loading is studied. Three different load positions are investigated: LP I with longitudinal web stiffeners, LP III without stiffeners and LP II directly at a diaphragm. Moreover, additional fatigue tests due to cyclic wheel loading are presented for all three load positions.
Published Version
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