Behaviour of T layout structures with and without dilatation

Abstract

Horizontal asymmetries in buildings can cause the building to experience torsion when receiving lateral loads where the earthquake load is one of the lateral loads. In this study, analyses of structures that have horizontal asymmetry is carried out in the form of structures with a T layout. To eliminate the torsional effect on buildings due to earthquake loads, the structures are dilated so that the structures are analyzed into two buildings with the purpose of they become two symmetrical buildings (Models 2 and 3). Time history response analysis was performed to assess whether there was an impact on the structural elements around the dilatation. The most significant result in model 1 is when the first mode of the structure rotates. Meanwhile, after being given dilatation, the two separate structures have moved in translation in mode 1 and 2. The deviation between floors in each model does not exceed the allowable deviation between floors. The building experienced pounding at 21.63 seconds, but this can be overcome by the separation of the structure (dilatation). The planned dilation distance is 70 mm.