DESIGN AND EVALUATION OF VERTICAL EVACUATION BUILDING AT KELUMBAYAN USING TSUNAMI MODELLING

Abstract

The Sumatran Fault and the Krakatau Volcano on Sunda Strait, Indonesia, has produced earthquakes and tsunamis on the region. One of the cities in this region that has high potential to be affected by a future disaster is Kelumbayan. A solution to minimize the casualties due to a tsunami is by constructing a Vertical Evacuation Building (VEB), which acts as a shelter and rescue building. Hence, the design of the VEB must ensure that it can resist large earthquakes and withstand tsunami impacts. Currently, there is no local code regarding tsunamis, hence the design of such a structure should be evaluated. This study conducts the design and evaluation of a VEB in Kelumbayan using a simulation of tsunami propagation. Based on the tsunami depth and forces from the modelling, also the number of people to be sheltered, the VEB structural model is developed. The 4-story reinforced concrete structure utilizes a special moment frame system, with applicable loads for the shelter, including earthquake and tsunami loads. The structural performance of VEB is then evaluated using non-linear static pushover analysis. The result shows that forces due to tsunami are greater than those of earthquake, thus defining the capacity of structural members. The analysis shows that the structure performs satisfactorily under the design seismic load, hence it can be used as a tsunami shelter. In conclusion, the design of VEB complies with the applicable building codes and is adequate for its function.