Details
| Original language | English |
|---|---|
| Title of host publication | EURODYN 2020 - 11th International Conference on Structural Dynamics, Proceedings |
| Editors | Manolis Papadrakakis, Michalis Fragiadakis, Costas Papadimitriou |
| Pages | 972-980 |
| Number of pages | 9 |
| ISBN (electronic) | 9786188507203 |
| Publication status | Published - 2020 |
| Externally published | Yes |
| Event | 11th International Conference on Structural Dynamics, EURODYN 2020 - online, Virtual, Athens, Greece Duration: 23 Nov 2020 → 26 Nov 2020 Conference number: 11 https://generalconferencefiles.s3-eu-west-1.amazonaws.com/eurodyn_2020_ebook_procedings_vol2.pdf |
Publication series
| Name | Proceedings of the International Conference on Structural Dynamic , EURODYN |
|---|---|
| Volume | 1 |
| ISSN (Print) | 2311-9020 |
Abstract
System identification of a code conforming low-rise reinforced concrete frame building in Kathmandu, Nepal is reported in this paper. The fundamental vibration period and damping ratio of the building were determined using ambient vibration records taken in three floors of the building. Ambient vibration measurements were taken using three triaxial accelerometers. Two methods of system identification, Welch spectral method and N4SID method, are used to estimate the modal properties. Fundamental vibration periods of the four-storied building estimated from non-parametric Welch spectral method are 0.292s and 0.289s in the two orthogonal directions. The corresponding results from the parametric state- space N4SID method are 0.266s and 0.264s in the orthogonal directions. The corresponding damping ratios are estimated to be 6.3% and 6.9%. These periods are longer than that of a simplified finite element model of the building assumed to be fixed at the supports. This indi- cates that the flexibility of the soil under the building foundation, plays an important role in the vibration frequencies of the structure.
Keywords
- Ambient vibration measurement, Brick infill, N4SID, RC building, System identification
ASJC Scopus subject areas
- Engineering(all)
- Building and Construction
- Engineering(all)
- Architecture
- Engineering(all)
- Civil and Structural Engineering
Cite this
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EURODYN 2020 - 11th International Conference on Structural Dynamics, Proceedings. ed. / Manolis Papadrakakis; Michalis Fragiadakis; Costas Papadimitriou. 2020. p. 972-980 (Proceedings of the International Conference on Structural Dynamic , EURODYN; Vol. 1).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - System identification of code conforming low-rise rc building in Lalitpur, Nepal
AU - Dhakal, Rajan
AU - Rupakhety, Rajesh
AU - Gautam, Dipendra
AU - Rahimi, Said Elias
N1 - Conference code: 11
PY - 2020
Y1 - 2020
N2 - System identification of a code conforming low-rise reinforced concrete frame building in Kathmandu, Nepal is reported in this paper. The fundamental vibration period and damping ratio of the building were determined using ambient vibration records taken in three floors of the building. Ambient vibration measurements were taken using three triaxial accelerometers. Two methods of system identification, Welch spectral method and N4SID method, are used to estimate the modal properties. Fundamental vibration periods of the four-storied building estimated from non-parametric Welch spectral method are 0.292s and 0.289s in the two orthogonal directions. The corresponding results from the parametric state- space N4SID method are 0.266s and 0.264s in the orthogonal directions. The corresponding damping ratios are estimated to be 6.3% and 6.9%. These periods are longer than that of a simplified finite element model of the building assumed to be fixed at the supports. This indi- cates that the flexibility of the soil under the building foundation, plays an important role in the vibration frequencies of the structure.
AB - System identification of a code conforming low-rise reinforced concrete frame building in Kathmandu, Nepal is reported in this paper. The fundamental vibration period and damping ratio of the building were determined using ambient vibration records taken in three floors of the building. Ambient vibration measurements were taken using three triaxial accelerometers. Two methods of system identification, Welch spectral method and N4SID method, are used to estimate the modal properties. Fundamental vibration periods of the four-storied building estimated from non-parametric Welch spectral method are 0.292s and 0.289s in the two orthogonal directions. The corresponding results from the parametric state- space N4SID method are 0.266s and 0.264s in the orthogonal directions. The corresponding damping ratios are estimated to be 6.3% and 6.9%. These periods are longer than that of a simplified finite element model of the building assumed to be fixed at the supports. This indi- cates that the flexibility of the soil under the building foundation, plays an important role in the vibration frequencies of the structure.
KW - Ambient vibration measurement
KW - Brick infill
KW - N4SID
KW - RC building
KW - System identification
UR - http://www.scopus.com/inward/record.url?scp=85098538726&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85098538726
T3 - Proceedings of the International Conference on Structural Dynamic , EURODYN
SP - 972
EP - 980
BT - EURODYN 2020 - 11th International Conference on Structural Dynamics, Proceedings
A2 - Papadrakakis, Manolis
A2 - Fragiadakis, Michalis
A2 - Papadimitriou, Costas
T2 - 11th International Conference on Structural Dynamics, EURODYN 2020
Y2 - 23 November 2020 through 26 November 2020
ER -