Análise dos efeitos das cargas transmitidas pelo escoramento às lajes de um edifício de concreto armado

Abstract

Over the construction stages of a reinforced concrete building shall be used a floor support system formed by molds, props and reshores. This support system is intended to support the concrete until it reaches its adequate strength. To keep the floor anchored for a certain period and speed up the execution of the floor it is necessary to keep the maintenance of the props on several floors. The removal of the props can only be done when the concrete has hardened enough to resist the actions on it, and not end up deforming by those actions when requested with an early age. Thus, this study aims to analyze the effects of the concrete loads during construction stages, and evaluate the efforts, and perpendicular displacement to the built structure section on slabs for three different cases of shoring, comparing with an already completed building to investigate the importance of the concreting load to do not compromise the structure. For this purpose was used as an analysis tool a finite elements software, evaluating the loads requests on the slabs by grid analogy, Firstly, three cases were analyzed for different levels of shoring during the construction stages and finally compared with the ready building. It is noticed that the higher the shoring of time and the use of remaining anchors better the distribution of loads and the lower the effort and strain on the flagstones of a building of reinforced concrete.