Examination of Maximum Relative Storey Drift Limitation According to 2007 DBYBHY

During the earthquake motion, limitation of storey drifts of is important. Maximum storey drifts for the structures to be constructed in our country has been restricted by “Specification For Structures to be Built in Disaster Areas (DBYBHY)” which is in force since 2007, according to the proviso of relative storey drift and A1, A2 irregularity factors. In the earthquake code which is published as draft in 2016 and is not in force yet, it has been planning to restrict the storey drifts for with and without gap conditions of infill wall - frame connections. First of all, it is aimed to investigate the limits of maximum reduced relative storey drift under specified conditions according to 2007 DBYBHY. In this study, the maximum values of allowable reduced storey drifts were specified seperately for reinforced concrete buildings which have 2.75m – 4.25m storey height interval, according to limitations specified in section of 2007 DBYBHY that is “Calculation and Limitation of Effective Relative Storey Drifts” for each of the Structural System Behaviour Factors (R). Additionally, as an example, maximum relative story drifts have calculated acording to “A1- Torsional Irregularity” section of 2007 DBYBHY by using the relative storey drifts which belongs to a 20 storey building from literature, and fort his building maximum relative storey drifts has calculated according to “B2- Interstorey Stifness Irregularity” section of 2007 DBYBHY for variable interstorey heights. At the end of the study, maximum values of relative storey drifts in the storey have revealed according to average storey drifts and storey height ratios.