Zülal AKBAY ARAMA, İlknur DALYAN, Muhammed Selahaddin AKIN

Statik ve Dinamik Yükleme Koşulları Altında Şev-Yüzeysel Temel Etkileşiminin Karşılaştırmalı Güvenlik Analizi

Bu çalışma, farklı kayma dayanımı özelliklerine sahip kohezyonlu homojen şevler üzerinde yer alan yüzeysel temellerin güvenlik analizine odaklanmıştır. İyi bilinen bir ticari sonlu elemanlar mantığı tabanlı iki boyutlu sayısal bir yazılım kullanılarak statik ve dinamik analizler gerçekleştirmiştir. 30 Ekim 2020'de meydana gelen Samos-İzmir depremi dikkate alınarak dinamik analizler uygulanmıştır. Şev yüksekliği ve eğiminin farklılaşmasına bağlı olarak şev geometrisinin değişimi de dikkate alınmıştır. Şev-yüzeysel temel etkileşimi, temelin şev kenarından farklı göreli mesafeleri ve temel için çeşitli yükleme büyüklükleri dikkate alınarak incelenmiştir. Analiz sonuçları, öngörülen değişkenlerin bütünsel sistem stabilitesi üzerindeki etkilerinin derecesini yorumlamak için güvenlik faktörü değerleri açısından yorumlanmıştır.

Anahtar Kelimeler:

Sonlu elemanlar, Şev, Yüzeysel temel, Etkileşim, Güvenlik, Dinamik yükleme

Comparative Safety Analyses of Slope-Shallow Foundation Interaction under Static and Dynamic Loading Conditions

This study is focused on the safety analysis of the shallow foundations located on cohesive homogenous slopes that has different shear strength characteristics. Static and dynamic analyses have been conducted with a well-known commercial finite element logic-based two dimensional numerical software. Dynamic analyses are performed with regard to the consideration of the Samos-İzmir earth-quake that happened in 30 October 2020. The change of the slope geometry depending on the differentiation of the slope height and inclination is also considered. The interaction between the slope-shallow foundation is investigated regarding different relative distances of the foundation from the slope edge and considering various loading magnitudes for the foundation. The results of the analyses are evaluated in terms of the factor of safety values to interpret the degree of the effects of foreseen variants on the integrated system stability.

Keywords:

Finite element, Slope, Shallow foundation, Interaction, Safety, Dynamic loading,

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1. Dey, A., Acharyya, R., Alammyan, A. 2019. Bearing Capacity and Failure Mechanism of Shallow Footings on Unreinforced Slopes: a State-of-the-art Review, International Journal of Geotechnical Engineering. 1-14.
2. Akbay Arama, Z., Akın, M.S., Çinicioğlu, S.F., 2018. Komşu Zemin Yapılarının Parametrik Analizi “Dolgu-Şev Etkileşimi”. Uludağ University Journal of The Faculty of Engineering, 23(2), 109-128.
3. Peters, R.G., 2011. Advanced Analysis of Shallow Foundations Located Near Slopes, University of Southern Queensland, Faculty of Engineering and Surveying, Dissertation Thesis, Queensland, 170.
4. Yamamoto, K., 2010. Seismic Bearing Capacity of Shallow Foundations Near SlopesUsing the Upper-bound Method, International Journal of Geotechnical Engineering, 4(2), 255-267.
5. Cascone, E., Casablanca, O., 2016. Static and Seismic Bearing Capacity of Shallow Strip Footings, Soil Dynamics and EarthquakeEngineering, 84(2016), 204-223.
6. Cong, S., Tang, L., Ling, X., Geng, L., Lu, J. 2018. Boundary Effect on the Seismic Response of a Three-dimensional Soil Slope with a Shallow Foundation on Top, KSCE Journal of Civil Engineering, 22(4), 1130-1140.
7. Raj, D., ASCE, S.M., Singh, Y., ASCE, M., Shukla, S.K., ASCE, M., 2018. Seismic Bearing Capacity on Strip Foundation Embedded in c-ϕ Soil Slope, Int. J. Geomech., 18(7), 04018076-1-16.
8. Xiao, Y., Zhao, M., Zhang, R., Zhao, H., Wu, G., 2019. Undrained Bearing Capacity of Strip Footings Placed Adjacent to Two-layered Slopes, Int. J. Geomech., 19(8), 06019014-1- 18, Technical Note.
9. Yang, S., Leshchinsky, B., ASCE, M., Cui, K., Zhang, F., Gao, Y., 2019. Unified Approach Toward Evaluating Bearing Capacity of Shallow Foundations near Slopes, J. Geotech. Geoenviron. Eng., 145(12), 04019110-1-16.
10. Izadi, A., Soumehsaraei, M.N.S., Chenari, R.J., Ghorbani, A., 2019. Pseudo-static Bearing Capacity of Shallow Foundations on Heterogeneous Marine Deposits Using Limit Equilibrium Method, Marine Georesources &Geotechnology, 37(10), 1163-1174.
11. Fatahi, B., Huang, B., Yeganeh, N., Terzaghi, S., Banerjee, S., 2020. Three-dimensional Simulation of Seismic Slope-foundation- Structure Interaction for Buildings Near Shallow Slopes, Int. J. Geomech., 20(1),04019140-1-20.
12. Yang, S., Leshchinsky, B., Cui, K., Zhang, F., Gao, Y. 2021. Influence of Failure Mechanism on Seismic Bearing Capacity Factors for Shallow Foundations Near Slopes, Geotechnique, 71(7), 594-607.
13. Maula, B.H., Zhang, L., 2011. Assessment of Embankment Factor Safety Using Two Commercially Available Programs in Slope Stability Analysis, Procedia Engineering 14, 559-566.
14. Özmen, B.O., 2019. Modelling the Variability in Seismically Induced Slope Displacements Due to Ground Motion Selection. MSc. Thesis, Middle East Technical University.
15. PLAXIS, Connect edition V21.01 Scientific Manual, BENTLEY.16. Wieland, M., 2018. Application of Pseudostatic Analysis in Seismic Design and Safety Evaluation of Embankment Dams. 16th European Conference on Earthquake Engineering.
17. Bowles, J.E., 1988. Foundation Analysis and Design. New York, McGraw-Hill.
18. AFAD, 2020. https://tadas.afad.gov.tr./ waveform-detail/215676, Access date: 08.04.2021.