Research on A1 irregularity status in different spectral acceleration coefficients on reinforced concrete structures

Abstract

Most of the building damages in our country are caused by earthquakes. As known, the properties of the building are determinant in the magnitude of the earthquake forces that cause these damages. Thus, selection of the structural system is crucial in the design process. In case of any irregularity in the building, load transfer will not be provided safely. In the Turkish Earthquake Code, related irregularities are analysed under two groups. Group A indicates the irregularities in the plan, and Group B represents vertical irregularities. Irregularities in the plan include A1 Torsional Irregularities; A2 Floor Discontinuities; and A3 Bulges in the Plan. In this study, A1 irregularity status in the reinforced concrete structure was analysed for different spectral acceleration coefficients. The purpose of the study is to understand the change of torsional irregularity coefficient in different spectral acceleration coefficients. As a result, in a typical building with the same geometric and stiffness properties, the torsional irregularity coefficient is not changed for different earthquake zones. Also, the importance of the location of the shear wall elements in the plan was once again emphasized.

Keywords

• Torsional İrregularity
• Reinforced Concrete Structure
• Structural Behavior
• Geometric Form

References

1. Demir A & Dönmez D (2008). The factors affecting torsional irregularity in multi-storey structures. Celal Bayar University Journal of Science, 4(1), 31-36.
2. Demir A, Bağcı M & Demir D D (2011). Torsional behavior of an existing hospital building in different site classes. Celal Bayar University Journal of Science, 7(1), 17-27.
3. Doğan O & Er Ş B (2010). Live load distribution investigation of the impact on torsional irregularity. International Journal of Engineering Research and Development, 2(2), 57-60.
4. Döndüren M S, Karaduman A, Çöğürcü M T & Altın M (2007). Torsional irregularity in the structures. Journal of Selcuk-Technic, 6(1), 42-52.
5. Erdem H (2016). Effects of torsional irregularity on reinforced concrete behaviour. Çukurova University Journal of the Faculty of Engineering and Architecture, 31(1), 459-468.
6. Özmen G (2000). The effect of plan geometry on torsional irregularity. Turkey Engineering News, 410(6), 37-41.
7. Özmen G (2001). Effect of stiffness distribution on torsional irregularity. Turkey Engineering News, 411(1), 37-40.
8. Özmen G (2004). Excessive torsional irregularity in multi-story structures. Technical Journal, 15(1), 3131-3144.

9. Özmen G (2012). Torsional irregularity conditions in earthquake regulations. Turkey engineering news, 57 (2), 52-64.
10. Soyluk K & Yavuz İ Y (2009). Effect of Basement Retaining Walls to torsional irregularity in frame type. İmo technical journal, 20(97), 4654-4673.
11. Uçar T & Merter O (2009). Effect of configuration of shear walls at floor plan to earthquake behavior of shear wall-frame reinforced concrete buildings. Deu journal of Engineering Science, 11(2), 11-18.
12. Yorulmaz A M (2018). Investigation of A1 irregularity in reinforced concrete for different earthquake zone, MS Thesis, University of Kto Karatay, Konya, Turkey.
13. Yön B & Sayın E (2009). Investigation of effect of local site classes to columns behavior on structures with torsional irregularity. e-journal of New World Science Academy, 4(2), 126-135.