The Maximum Allowable Peak Ground Acceleration of a Six Storey Building Based on Micro Tremor and Numerical Analysis
It is widely known that the natural frequency of building structures can be determined by analyzing Fourier transforms from micro vibrational records. This research was conducted in the structural laboratory of the Department of Civil and Environmental Engineering of UGM, which is a six-storey build...
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| Format: | Conference or Workshop Item |
| Language: | English |
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2022
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| Online Access: | https://repository.ugm.ac.id/282245/1/Pandu%20and%20Priyosulistyo%20-%202022%20-%20The%20maximum%20allowable%20peak%20ground%20acceleration%20of%20.pdf |
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| author | Pandu, Agustinus Sri Priyosulistyo, Henricus |
| author_facet | Pandu, Agustinus Sri Priyosulistyo, Henricus |
| author_sort | Pandu, Agustinus Sri |
| collection | UGM |
| description | It is widely known that the natural frequency of building structures can be determined by analyzing Fourier transforms from micro vibrational records. This research was conducted in the structural laboratory of the Department of Civil and Environmental Engineering of UGM, which is a six-storey building. The aim of this study is to verify if maximum ground acceleration of the building in accordance to SNI: 1726-2012 can be approximated by means of analysing amplitudes of microtremor data of the building at resonance. In addition, a numerical calculation is also presented using SAP 2000 for a comparison purpose. The accelerometers were positioned alternately in the direction of N-S and E-W, at the lower end of the columns, close to the center of gravity of the building, on each floor. One of the PCB-Piezotronics accelerometers was placed at the bottom end of the ground floor column while the other one was placed at the bottom end of the consecutively above floor columns. Natural frequencies of the building, resulting from the site measurement, were utilized for validation of the model. The results of this measurement indicate that the first natural frequencies in the direction of N-S and E-W are respectively 2.2473 and 2.1496 Hz. Based on Nakamura theorem (Clear identification of fundamental idea of Nakamura’s technique and its applications, 2000 1), the highest vulnerability index occurs in the N-S direction, on the 4th story but for the E-W direction it does in the 3rd story. The predicted maximum allowable ground accelerations, based on the minimum acceptable acceleration at the drift ratio between floors at 1% of resonance, are 216.576 cm/s2 (gal) and 177.037 cm/s2 (gal) in the N-S and E-W directions respectively. If the lowest value binds, the maximum allowable ground acceleration of the building is 177.037 cm/s2. The bi-axial analysis on column K1 at 4th and 3rd story approves that the column cannot withstand peak ground acceleration at resonance with amplitude of 216.576 cm/s2 (gal). The numerical comparison using SAP 2000 and sinusoidal function at the resonance frequency of 2.1705 Hz in the N-S direction, shows that the maximum allowable acceleration is of 241.33 cm/s2 (gal) which is similar to the experimental results in the same direction. On the other hand, the numerical analysis using a sinusoidal frequency at out of resonance (4 Hz) in the E-W direction predicts allowable ground acceleration of 943.643 cm/s2 (gal). Such a prediction is 533% greater than the results of site measurement. This concludes that if there is no resonance to occur during the earthquake shake, the building can accept significantly higher ground acceleration. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. |
| first_indexed | 2024-03-14T00:05:12Z |
| format | Conference or Workshop Item |
| id | oai:generic.eprints.org:282245 |
| institution | Universiti Gadjah Mada |
| language | English |
| last_indexed | 2024-03-14T00:05:12Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | oai:generic.eprints.org:2822452023-11-24T08:59:13Z https://repository.ugm.ac.id/282245/ The Maximum Allowable Peak Ground Acceleration of a Six Storey Building Based on Micro Tremor and Numerical Analysis Pandu, Agustinus Sri Priyosulistyo, Henricus Civil Engineering not elsewhere classified Civil Engineering Engineering It is widely known that the natural frequency of building structures can be determined by analyzing Fourier transforms from micro vibrational records. This research was conducted in the structural laboratory of the Department of Civil and Environmental Engineering of UGM, which is a six-storey building. The aim of this study is to verify if maximum ground acceleration of the building in accordance to SNI: 1726-2012 can be approximated by means of analysing amplitudes of microtremor data of the building at resonance. In addition, a numerical calculation is also presented using SAP 2000 for a comparison purpose. The accelerometers were positioned alternately in the direction of N-S and E-W, at the lower end of the columns, close to the center of gravity of the building, on each floor. One of the PCB-Piezotronics accelerometers was placed at the bottom end of the ground floor column while the other one was placed at the bottom end of the consecutively above floor columns. Natural frequencies of the building, resulting from the site measurement, were utilized for validation of the model. The results of this measurement indicate that the first natural frequencies in the direction of N-S and E-W are respectively 2.2473 and 2.1496 Hz. Based on Nakamura theorem (Clear identification of fundamental idea of Nakamura’s technique and its applications, 2000 1), the highest vulnerability index occurs in the N-S direction, on the 4th story but for the E-W direction it does in the 3rd story. The predicted maximum allowable ground accelerations, based on the minimum acceptable acceleration at the drift ratio between floors at 1% of resonance, are 216.576 cm/s2 (gal) and 177.037 cm/s2 (gal) in the N-S and E-W directions respectively. If the lowest value binds, the maximum allowable ground acceleration of the building is 177.037 cm/s2. The bi-axial analysis on column K1 at 4th and 3rd story approves that the column cannot withstand peak ground acceleration at resonance with amplitude of 216.576 cm/s2 (gal). The numerical comparison using SAP 2000 and sinusoidal function at the resonance frequency of 2.1705 Hz in the N-S direction, shows that the maximum allowable acceleration is of 241.33 cm/s2 (gal) which is similar to the experimental results in the same direction. On the other hand, the numerical analysis using a sinusoidal frequency at out of resonance (4 Hz) in the E-W direction predicts allowable ground acceleration of 943.643 cm/s2 (gal). Such a prediction is 533% greater than the results of site measurement. This concludes that if there is no resonance to occur during the earthquake shake, the building can accept significantly higher ground acceleration. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2022 Conference or Workshop Item PeerReviewed application/pdf en https://repository.ugm.ac.id/282245/1/Pandu%20and%20Priyosulistyo%20-%202022%20-%20The%20maximum%20allowable%20peak%20ground%20acceleration%20of%20.pdf Pandu, Agustinus Sri and Priyosulistyo, Henricus (2022) The Maximum Allowable Peak Ground Acceleration of a Six Storey Building Based on Micro Tremor and Numerical Analysis. In: 5th International Conference on Sustainable Civil Engineering Structures and Construction Materials (SCESCM). https://link.springer.com/chapter/10.1007/978-981-16-7924-7_50 |
| spellingShingle | Civil Engineering not elsewhere classified Civil Engineering Engineering Pandu, Agustinus Sri Priyosulistyo, Henricus The Maximum Allowable Peak Ground Acceleration of a Six Storey Building Based on Micro Tremor and Numerical Analysis |
| title | The Maximum Allowable Peak Ground Acceleration of a Six Storey Building Based on Micro Tremor and Numerical Analysis |
| title_full | The Maximum Allowable Peak Ground Acceleration of a Six Storey Building Based on Micro Tremor and Numerical Analysis |
| title_fullStr | The Maximum Allowable Peak Ground Acceleration of a Six Storey Building Based on Micro Tremor and Numerical Analysis |
| title_full_unstemmed | The Maximum Allowable Peak Ground Acceleration of a Six Storey Building Based on Micro Tremor and Numerical Analysis |
| title_short | The Maximum Allowable Peak Ground Acceleration of a Six Storey Building Based on Micro Tremor and Numerical Analysis |
| title_sort | maximum allowable peak ground acceleration of a six storey building based on micro tremor and numerical analysis |
| topic | Civil Engineering not elsewhere classified Civil Engineering Engineering |
| url | https://repository.ugm.ac.id/282245/1/Pandu%20and%20Priyosulistyo%20-%202022%20-%20The%20maximum%20allowable%20peak%20ground%20acceleration%20of%20.pdf |
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