PENENTUAN KARAKTERISTIK RESONANSI BANGUNAN DI SEKOLAH TINGGI METEOROLOGI KLIMATOLOGI DAN

Abstract

One of the factors that can be used to estimate the earthquake hazard to a building is knowing the resonance value of the building. The resonance value of the building can be determined by performing microtremor measurements to obtain the natural frequency value of the building and the ground and then it be calculated to get resonance value between the building and the ground beneath it. Microtremor measurements were performed on four buildings at State Collage of Meteorology Climatology and Geophysics (STMKG). The investigated buildings have varying in height between 2 to 3 floors. Which consists of B1, B2, B3, and B4 buildings. It be measured on the different parts of the building structure (corners and center of the structures). The research was conducted to find out the resonance characteristic between the ground and the building. The equipment consist of a set of Lennartz Mark 3D seismometer with the duration of recording for 1 hour. HVSR (Horizontal to Vertical Spectral Ratio) method used to process and analyze microtremor data of the ground and then spectrum analysis applied to get the general characteristics of each component in each building. In general, the highest resonance value is obtained in B2 building. Low to moderate resonance is found in B1 building. While the B3 and B4 buildings have the same characteristics. It have low and high resonance value.