Abstract
In this study, Soil-structure interaction (SSI) of Reinforced Concrete (RC) buildings which are instrumented by building monitoring systems is detected and identified. SSI can have a major influence on the seismic response of buildings constructed on soft soils. The dominant frequency recorded for a building subjected to SSI is always smaller than the dominant frequencies of the fixed-based building, and of the foundation when no building is present. The identification of SSI refers to extracting natural frequencies of the fixed-based building and the foundation from recordings of the foundation and upper stories. This interaction can be identified easily from the dynamic characteristics of the structure obtained by using seismic vibration records on the structures and if in addition to the records from the building, there are also free-field surface records available from nearby locations that are not influenced by building's vibrations. Two examples are studied according to the mentioned method by using their recorded responses during the two strongest earthquakes nearby Antakya since 2006.
Keywords
References
- Lysmer, J., Kuhlemeyer, R.L. (1969). Finite dynamic model for infinite media. Journal of Engineering Mechanics ASCE, 95(EM4), pp.859- 877.
- White, W., Valliappan, S., Lee, I.K. (1977). Unified boundary for finite dynamic models. Journal of Engineering Mechanics ASCE, 103(5), pp.949-964.
- Karabalis, D.L., Beskos, D.E. (1984). Dynamic response of 3-D rigid surface foundations by time domain boundary element method. Earthquake Engineering and Structural Dynamics, 12, pp.73– 93.
- Wolf, J.P., Song, C. (1996). Finite-Element Modelling of Unbounded Media. Wiley: England.
- Genes, M.C., Kocak, S. (2002). A combined finite element based soil-structure interaction model for large-scale systems and applications on parallel platforms. pp.1119-1131.
- Luco, J.E., Trifunac, M.D., and Long, H.L. (1988). Isolation of soil-structure interaction effects by full scale forced vibration tests. Earthquake Engineering and Structural Dynamics, 116(1), pp.1-21.
- Şafak, E. (1995). Detection and Identification of Soil-Structure Interaction in Buildings from Vibration Recordings. Journal of Structural Engineering, 121(5), pp.899-906.
- Ljung, Li (1987). System identification: theory for the user, Prentice-Hall, Inc. Englewood Cliffs, N.J.
Betonarme Çerçeveli Yapıların Zemin-Yapı Etkileşimlerinin Kuvvetli Yer Hareketi Kayıtları Kullanılarak Belirlenmesi
Abstract
Bu çalışmada, bina izleme sistemleri ile donatılmış olan betonarme çerçeveli yapıların zemin-yapı etkileşiminin belirlenmesi gerçekleştirilmiştir. Yumuşak zemin üzerine inşa edilen binaların sismik titreşimlere karşı tepkilerinde zemin-yapı etkileşimi çok etkili bir durumdur. Zemin-yapı etkileşimi olabilecek bir binanın kaydedilen hakim frekansı, zemine ankastre olarak oturmuş bir binaya göre daha küçüktür. Zemin-yapı etkileşimi, ankastre olarak zemine oturmuş bina ve zeminin doğal titreşim periyotlarından, binanın temel seviyesinden ve üst katlarındaki kayıtlardan elde edilmiş titreşim periyotlarının çıkarılmasını ifade etmektedir. Bina üzerinde elde edilmiş sismik titreşim kayıtlarından ve bu bina üzerindeki kayıtlara ek olarak, binanın titreşiminden etkilenmeyen ve bina yakınında bulunan serbest alan kayıtları kullanılarak bu etkileşim kolaylıkla bulunabilir. Değinilen metot kullanılarak iki örnek binada, 2006 yılından bu yana kadar kaydedilmiş en şiddetli iki deprem kayıtları kullanılarak zemin-yapı etkileşimi çalışılmıştır
References
- Lysmer, J., Kuhlemeyer, R.L. (1969). Finite dynamic model for infinite media. Journal of Engineering Mechanics ASCE, 95(EM4), pp.859- 877.
- White, W., Valliappan, S., Lee, I.K. (1977). Unified boundary for finite dynamic models. Journal of Engineering Mechanics ASCE, 103(5), pp.949-964.
- Karabalis, D.L., Beskos, D.E. (1984). Dynamic response of 3-D rigid surface foundations by time domain boundary element method. Earthquake Engineering and Structural Dynamics, 12, pp.73– 93.
- Wolf, J.P., Song, C. (1996). Finite-Element Modelling of Unbounded Media. Wiley: England.
- Genes, M.C., Kocak, S. (2002). A combined finite element based soil-structure interaction model for large-scale systems and applications on parallel platforms. pp.1119-1131.
- Luco, J.E., Trifunac, M.D., and Long, H.L. (1988). Isolation of soil-structure interaction effects by full scale forced vibration tests. Earthquake Engineering and Structural Dynamics, 116(1), pp.1-21.
- Şafak, E. (1995). Detection and Identification of Soil-Structure Interaction in Buildings from Vibration Recordings. Journal of Structural Engineering, 121(5), pp.899-906.
- Ljung, Li (1987). System identification: theory for the user, Prentice-Hall, Inc. Englewood Cliffs, N.J.
Details
| Primary Language | English |
|---|---|
| Journal Section | Research Articles |
| Authors | |
| Publication Date | April 21, 2011 |
| Submission Date | April 20, 2011 |
| Published in Issue | Year 2011Volume: 14 Issue: 1 |