Zemin Tipinin Betonarme Sanayi Bacalarının Dinamik Davranışına Etkisi

Year 2022, Volume: 3 Issue: 2, 99 - 114, 30.12.2022

Muhammet Sarı , Erol Yılmaz , Ahmet Can Altunışık

https://doi.org/10.53501/rteufemud.1178611

Abstract

Farklı malzeme ve yöntemlerle inşa edilen endüstriyel yapılar, sanayinin gelişmesi ve enerji ihtiyacının artması ile sektörde önemli bir rol oynamaktadır. Endüstriyel yapıların uzun yıllar hizmet verebilmesi için tasarım ve uygulama aşamasında birçok parametre dikkate alınmaktadır. Bu çalışmanın amacı, betonarme endüstriyel bacaların zemin-yapı etkileşimine (SSI) bağlı dinamik davranışını incelemektir. Bu nedenle örnek olarak 1999 Kocaeli Depremi'ne maruz kalan betonarme bir endüstriyel baca seçilmiştir. Farklı özelliklere sahip (sert, orta ve yumuşak) zeminlerin seçilen yapının dinamik davranışına etkisi ANSYS sonlu elemanlar programında lineer zaman alanı analizi ile sayısal olarak incelenmiştir. Analizlerde Kocaeli Depremi'nin (1999) yatay bileşeni kullanılmıştır. Çalışmalar sonucunda yapının mod şekli ve frekansının yanı sıra gerilme, gerinim ve yer değiştirmeler de elde edilmiştir. Zemin ortamının sertliği azaldıkça (sert zeminden yumuşak zemine geçiş), baca tepe yer değiştirmelerinin ve boşluk kenarlarındaki gerilmelerin arttığı gözlemlenmiştir.

Keywords

endüstriyel bacalar, yapı-zemin etkileşimi, sonlu elemanlar yöntemi

Effect of Soil Type on Dynamic Behavior of Reinforced Concrete Industry Chimneys

Abstract

Industrial structures built with different materials and methods play an important role in the sector with development of industry and increase in energy need. Many parameters are considered in the design and application phase of industrial structures to provide service for many years. The aim of this study is to examine dynamic behavior of reinforced concrete industrial chimneys depending on soil-structure interaction (SSI). For this reason, a reinforced concrete industrial chimney, which was exposed to the 1999 Kocaeli Earthquake, was chosen as a sample. The effect of soils with different properties (hard, medium and soft) on the dynamic behavior of the selected structure was investigated numerically by linear time history analysis in ANSYS finite element program. The horizontal component of the Kocaeli Earthquake (1999) was used in analyses. As a result of the studies, besides the mode shape and frequency of structure, stress, strain and displacements were also obtained. It has been observed that as the hardness of the soil environment decreases (transition from hard soil to soft soil), chimney apex displacements and stresses on the edge of the voids increase.

Keywords

Linear dynamic analysis, industrial chimneys, soil-structure interaction, finite element method

References

• Ahmadi, E. (2019). On the structural energy distribution and cumulative damage in soil-embedded foundation-structure interaction systems, Engineering Structures, 182, 487-500
• Akniyazov, D. (2016). Effectiveness of diagonal opening reinforcement in reinforced concrete chimneys under gravity and lateral service loads, Master’s Thesis. Boğaziçi University, İstanbul, Turkey, 76s.
• Altunışık, A.C., Kanbur, B., Genc, A.F. and Kalkan, E. (2019). Structural response of historical masonry arch bridges under different arch curvature considering soil-structure interaction, Geomechanics and Engineering, 18(2), 141-151.
• ANSYS (2016). Swanson Analysis System, USA.
• Esmail, M.F., Khodary, A., Mekhail, T. and Hares, E. (2022). Effect of wind speed over the chimney on the updraft velocity of a solar chimney power plant: An experimental study, Case Studies in Thermal Engineering, 37, 102265.
• Ge, Q., Xiong, F., Xie, L., Chen, J. and Yu. M. (2019). Dynamic interaction of soil–structure cluster, Soil Dynamics and Earthquake Engineering, 123, 16-30.
• Gould, P.L., Huang, W., Martinez, R. and Johnson, G. S. (2004). Nonlinear analysis of a collapsed heater stack, 13th World Conference on Earthquake Engineering, Vancouver, B.C., Canada.
• Gunaydin, M., Erturk, E., Genc, A.F., Okur, F.Y., Altunışık, A.C. and Tavsan, C. (2022). FE model updating and seismic performance evaluation of a historical masonry clock tower, Earthquakes and Structures, 22(1), 65-82.
• Hökelekli, E. and Al-Helwani, A. (2019). Effect of soil properties on the seismic damage assessment of historical masonry minaret–soil interaction systems, The Structural Design of Tall and Special Buildings, 29(2), e1694.
• Lysmer, J. and Kuhlemeyer, R.L. (1969). Finite dynamic model for infinite media. Journal of the Engineering Mechanics Division, 95, 859-877.
• Maj, M. and Ubysz, A. (2017). Cracked reinforced concrete walls of chimneys, silos and cooling towers as result of using formworks, MATEC Web of Conferences, 146.
• Pinzon, L.A., Manica, M.A., Pujades, L.G. and Alva, R.E. (2020). Dynamic soil-structure interaction analyses considering directionality effects, Soil Dynamics and Earthquake Engineering, 130, 106009.
• Qaftan, O.S., Toma-Sabbagh, T., Weekes, L. and Augusthus-Nelson, L. (2020). Validation of a finite element modelling approach on soil-foundation-structure interaction of a multi-storey wall-frame structure under dynamic loadings, Soil Dynamics and Earthquake Engineering, 131, 106041.
• Remyasree, A.R. and Megha, V. (2016). Non-linear seismic analysis of reinforced concrete chimney, SSRG International Journal of Civil Engineering, 3(8).