Dimensionamento de viga de rolamento de ponte rolante em concreto protendido

Abstract

This paper intends to present the definition, characteristics, modes of use and, mainly, the design of one of the elements present in the crane, the overhead crane (which supports the rolling path), which will be calculated in prestressed concrete. Those equipments are used to transport loads within a predetermined physical space. It has the name of "overhead crane" because it consists basically of a main beam supported at each end by rolling supports that move on two raised and parallel rails, the approximate length of the beam apart (PASSOS, 2011). Prestressed Concrete emerged as an evolution of Reinforced Concrete, with the basic idea of applying prior compression stresses in the region of the cross section of the part, which will be tensiled later by the action of external loading applied to the structure. In this way, the final tensile stresses are decreased by the pre-applied compression stresses (prestressing). As a result, the geometric characteristics of the cross section, loads, prestressing forces applied over the life of the part, the amount of active and passive reinforcement were calculated and presented, so that it has structural safety in all its extension. Finally, it concludes with a consideration of the use of existing mechanisms to optimize the performance of structures and with suggestions for future papers.