Accidental Loads in Crane Girders: A Case Study

António José Luís dos; Carlos Alberto Ferreira de Sousa; João José Rio Tinto de

Key information

Authors:

António José Luís dos (António José Luís dos Reis); Carlos Alberto Ferreira de Sousa (Carlos Alberto Ferreira de Sousa Oliveira); João José Rio Tinto de (João José Rio Tinto de Azevedo)

Published in

July 1984

Abstract

In crane design an accidental action that should be considered is the failure of one of the hanging mechanisms during transport operations of large masses. In this paper, the case of a crane transporting a large mass suspended by two sets of cables is considered. The dynamic behavior and the forces induced in the crane, due to the failure of one of the hanging mechanisms, are studied using two 3 degrees of freedom mathematical models. The highly nonlinear differential equations of motion are derived and integrated by Runge-Kutta algorithm. The influence of the stiffness of the cables, the initial configuration of the system, the value of the hanging force corresponding to the cable release, and the stiffness of the braking system of the trolley are analyzed.