The effects of frame discontinuity on structural behavior in reinforced concerte buildings

In this thesis study, the effect of beam discontinuity on the behavior of structure in concrete buildings was examined. For this purpose, 4 structure models were prepared. In the Model 1, which is the reference for the other models, there is no cantilever or beam discontinuity (Regular Model-1). In Model 2 with Cantilever, 150cm cantilevers were added to all four fronts of the building. In Model 3 with Cantilever and Beam Discontinuity, 12 of the surrounding frame beams of Model 2 were removed in order to create beam discontinuity. In Model 4 with Cantilever and Beam Discontinuity, some of the beams at the ends of cantilever were removed. Representing the low and mid-high buildings constituting the majority of buildings in our country and being damaged in earthquake at highest level, 3-, 5-, and 7-storey buildings (4 models in each) were created. The analyses of 12 models in total were performed using İdeCAD Static 7 package program and the results were interpreted. In this study, the earthquake analyses of the buildings with continuous and discontinuous frame beams were compared. Increases up to 6.4% in period values, 18.4% in top displacements of the buildings, 21.8% in relative interstory drift, 20.3% in second order effects, 11% in shear forces on the beams, and 18.9% in momentum values were observed. It was suggested that the beam discontinuity should be considered in earthquake regulations and a provision should be provided.