Structural Model Test of Lightweight Girder of Bridge Crane

doi:10.3901/JME.2015.23.168

Abstract

Abstract: In order to research the influence of girder’s lightweight plan on strength and static rigidity, similarity criterions between prototype girder and similarity girder are derived from equational analysis based on similarity theory and elastostatics. The scheme of structural model test is designed reasonably and the study of structural model test is carried out. Results show that bending normal stress of upper half of web at midspan of lightweight girder increases to some extent and bending normal stress of bottom half of web decreases within a narrow range. Shear stress at the end-span declines by a great margin. The maximum deflection of lightweight girder comes down. The strength and static rigidity of lightweight girder are checked based on design rules for cranes. It is feasible to wipe off some material periodically in order to realize the lightweight design of girder on the premise of satisfying the strength and static rigidity.

Key words: bridge crane, lightweight girder, similarity girder, similarity theory, structural model test

JIAO Hongyu,ZHOU Qicai, LI Ying, CHEN Qingzhang, XU Guangju. Structural Model Test of Lightweight Girder of Bridge Crane[J]. Journal of Mechanical Engineering, 2015, 51(23): 168-174.

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