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Assessment of the possibility of increasing a load - carrying strength of truss bridges of overhead travelling cranes

Keywords: truss bridges , cranes , finite element method

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Abstract:

A possibility of increasing the load-carrying strength of truss bridges of overhead travelling cranes by transferring a part of a useful load from the main truss (which transfers directly the load originated from road wheels of the crane carriage) on the parallel auxiliary truss by means of increasing rigidity of truss members joining both trusses - was presented in the paper. The verification of a static relief of the main truss by the auxiliary one as a function of rigidity of transverse and skew space trusses was performed. The A. Blum method was used in analytical calculations. The obtained results were verified by means of the ANSYS 12.1 program utilising the finite element method (FEM).

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