Behavior Identification of Subtractive Transformation in Building Design Process against Earthquakes

Indonesia is an earthquake-prone region, so that the building in Indonesia should be designed to withstand earthquakes. Earthquake resistant building design should start from the subtractive transformation architectural design. Subtractive transformation is a form that can be changed by reducing the partial volume. This transformation also changes the behavior of the building structure against earthquake loads. This study will examine the basic model building of ten floors and the basic model will then be subtracted 89%, 78%, 60%, 56%, 47% and 33% of the basic model. From the configuration changes, researchers studied the behavior of the building initial structure and the subtractive against earthquakes.This study utilizes simulated experimental research. From this study, researchers discovered a number of points that can be summed up as follows: seismic shear force is highly dependent on the building with the weight of the building itself, there are three conditions of the building which possess a relatively small potential event of eccentricity and torque to the building, namely a). Ordinary condition of horizontal- vertical and two-axis symmetric b ). irregular condition of vertical and two-axis symmetric and c ). irregular condition of horizontal and two-axis asymmetric but only possesses little subtractive on buildings, for example ± 10% of building mass, and the performance level of ten-floor building of strong earthquake zone with a rigid frame system will cause minor to moderate damage and require a dual system