INCREMENTAL ANALYSIS INCLUDING SHRINKAGE, CREEP AND CONSTRUCTIVE EFFECTS ON REINFORCED CONCRET TRANSFER GIRDER
reinforced concrete buildings, constructive effects, staged construction, creep and shrinkage.
The numeric modeling and methods of measurement applied to reinforced concrete structures could differ from the buildings’ real conditions. The effects of staged constructive method, in which loads are positioned on the floors bellow, and the time strains, such as creep and shrinkage when taken into account in conventional structural analysis, occur in a simplified manner. For hyperstatic structure under high loads cases - as is the case of transition beams - are even more relevant the mentioned effects, which could be crucial for ensuring the structural safety. Therefore, it is indispensable to apply the incremental analysis method and knowing the consequences to the stress and strains caused by construction loads and time strains. The aim of this study is modelling a 10- storey standard building on the SAP 2000 software containing a hyperstatic transfer girder on the ground floor. It will be considered the shrinkage, creep and constructive effects, analyzing a 2D gantry, trying to identify how these deformations influence the values of maximum moments in the beam in question. The main results comprises an increase in the moment of transition change as a whole, as well as displacements. The percentage increases between the use of conventional and incremental analysis were higher for the more paved gantries, however, a more sudden variation of effort occurs when the building has lower heights and more floors are added.