| Autor: |
Utomo, F. B., Wijaya, S. K., Pramono, S. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2023, Vol. 2604 Issue 1, p1-9, 9p |
| Abstrakt: |
The building structure must be designed to have a particular function and remain sturdy if external disturbances can cause the building to collapse and cause casualties. Earthquake occurred on Saturday, April 10, 2021 at 14:00:16 WIB, with the epicenter in the Indian Ocean south of Malang City. This earthquake with magnitude of 6.1 Mw caused ground shaking up to VI MMI in several affected locations. BMKG has installed Structure Health Monitoring (SHM) acquisition system in the BMKG building located in Denpasar, Bali, about 290 km east of the earthquake's epicenter. This rectangular building has three floors with a steel-reinforced concrete construction. The building monitoring system uses a 3-component accelerometer sensor which is placed on each floor of the building. The analysis of seismic recordings shows that on the top floor, the recorded acceleration value is 0.256 gal, or amplification occurs with a ratio of ten times to the ground floor. The natural frequency of the building using the spectra ratio method shows the building vibrates with the same frequency on each floor with a frequency of 4.374 Hz in the N-S direction. The soil-building resonance frequency analysis shows a low resonance level with the E-W axis, but the medium level was calculated from the N-S axis. Analysis shift of the natural frequency of the building before and after the earthquake shows a decrease in the natural frequency on its two-horizontal axis, by 1.5 Hz on the E-W axis and 1.3 Hz on the N-S axis. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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