Abstract
Mobile telescopic cranes are built in thin plate design and, in some cases, buckling is allowed to occur under normal operating conditions. However, a number of national crane design codes, including the Swedish code, do not allow buckling of any kind. The present investigation was carried out in order to provide complementary design rules for postbuckling analysis. The two major design factors are static strength and global instability. The postbuckling strength analysis is readily done by use of available methods. Mobile crane booms are often long slender beams, which have to be designed with due consideration to second-order effects, even when buckling is not allowed. When a crane is designed for operation in the postbuckling range, the interaction of local plate buckling and global instability (tilting) has to be considered.
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