Optimum Design of Bridge Girder of an EOT Crane Structure

Abstract

Bridge Girder which carries various dead loads and live load is heavily stressed part of Crane structure. Along with the strength it should provide sufficient rigidity to maintain the proper and safe movement of the load. Failure to sustain the load while in operation could lead to loss of material and in worst case persons working nearby the crane. It is also the need of the Industry to reduce the weight of the structure thereby reducing the cost of fabrication and also the running cost of the crane. In this paper weight optimization of the crane girder is carried out using a custom made C program based on the Davidon-Fletcher-Powell (DFP) method and the solution is verified using ANSYS software. The C program and finite element results also meet the stringent requirements stipulated by Indian Standard IS: 807.