Yapı Sistemlerinde Konsol Çıkmalar ve Burulma Düzensizliği Açısından Deprem Tepkisine Etkileri

Öz

Yapıların deprem performansı ilk olarak binanın geometrisine bağlıdır. Sismik yüklemeler binada tahmin edilemeyen deplasmanların oluşmasına ve yapı elemanlarının hesaplanandan daha fazla zorlanmasına yol açabilir. Depreme dayanıklı yapı tasarımı içinde burulma düzensizlikleri çok önemlidir. Bu çalışmada binalarda bulunan çıkma konsollar ve bunların yapının deprem dayanımına olan etkisi incelenmiştir. Bu amaçla, 5 değişik çıkma konfigürasyon alternatifi ve 3 farklı konsol boyu parametre olarak seçilmiştir. Model binalar ETABS programında modellenerek, “response spektrum” analizi gerçekleştirilmiş ve sismik analiz yapılarak, konsol ve çıkmaların etkisi incelenmiştir.

Anahtar Kelimeler

• Deprem
• Deprem yönetmeliği
• Düzensizlik
• Konsol çıkma
• Burulma

OVERHANGS IN STRUCTURAL SYSTEMS AND EARTHQUAKE BEHAVIOUR FROM TORSIONAL IRREGULARITY POINT OF VIEW

Öz

Earthquake behaviour of structural systems strongly depends on geometry of the building. The seismic motions can create unpredictable displacements and corresponding structural members may be forced more than that was evaluated. Torsional response of structures is very important for earthquake resistant design philosophy. In this study, overhangs in buildings and their effect on torsional displacements under seismic forces was evaluated. The model building has 5 different overhang alternatives and 3 different overhang lengths. Structural systems were modelled in a finite element packed program ETABS and investigated under response spectrum analyse cases. Mode superposition method used for determination of dynamic properties. Effect of cantilever overhangs in seismic response were evaluated.

Anahtar Kelimeler

• Earthquake
• Earthquake code
• Irregularity
• Overhangs
• Torsional response

Kaynakça

1. Duggal S.K., 2007, Earthquake Resistant Design of Structures, UK: Oxford University Press, London, UK.
2. Gulay, F.G., Calim, G., 2003, “A Comparative Study of Torsionally Unbalanced Multi-Storey Structures Under Seismic Loading”, Turkish Journal Engineering Environment Science, Vol. 27, pp. 9-11.
3. Inel, M., Ozmen, H.B., Bilgin, H., 2008, “Re-evaluation of Building Damage During Recent Earthquakes in Turkey”, Engineering Structures, Vol. 30, pp. 412–427.
4. Korkmaz, S.Z., Korkmaz, H.H., “Seismic Design Considerations about Architectural Design Aspects and Irregularities”, Proceedings of the World Congress on Advances in Structural Engineering and Mechanics (ASEM13), Korea, 2013.
5. Mendi, H.E., 2005, Evaluation Of Architectural Consciousness And Exploration Of Architecture-Based Issues In Seismic Design, MSc Dissertation, Middle East Technical University, Ankara.
6. TEC-2007, Turkish Earthquake Code, Specification for Buildings to be Built in Seismic Zones, Ministry of Public Works and Settlement, Ankara, 2007.
7. Tezcan, S., Alhan, C., 2008, “Parametric Analysis of Irregular Structures under Seismic Loading According to the New Turkish Earthquake Code”, Engineering Structures, Vol. 23, pp. 600–609.
8. Tezcan, S., 1998, An Architect’s Log Book for Earthquake Resistant Design, Turkish Earthquake Foundation Press, Istanbul, Turkey. TS500-2000, Turkish Reinforced Concrete Code, Turkish Standarts Institue., Ankara, 2000.

9. Ozmen, C., Unay, A.I., 2007, “Commonly Encountered Seismic Design Faults due to the Architectural Design of Residential Buildings in Turkey”, Building and Environment, Vol. 42, pp. 1406–1416.