Effects of Material Strength on Structural Performance of Damaged RC Buildings

Year 2016, Volume: 6 Issue: 1, 22 - 25, 30.06.2016

Ercan Işık

https://doi.org/10.17678/beujst.96498

Abstract

The first defect was related with concrete for RC buildings that damaged after an earthquake. In this study, effects of concrete class on structural performance of reinforced concrete building have been investigated. Çeltiksuyu School building that has collapsed after 2003 Bingöl earthquake was selected to obtain realistic results. Calculations have been made for each concrete class which was selected as C8, C16, C20, C25 and C30. Pushover analyses were used for both direction of selected building.  As a result, structural behaviour of RC buildings with different concrete classes is compared and evaluated according to analysis results in detail. The displacement and internal forces obtained from results of analysis is investigated comparatively. The results show that base shear of building was increased according to increasing concrete strength. The increasing in base shear has been increased the amount of peak displacement in the structure. As a result, it can say that concrete strength was not too defective. The main issue is manufacturing of concrete has not been made under proper conditions. The reason for this is lack of control, workmanship and material defects.

Keywords

Structural performance, conrete class, strength, pushover analysis

References

• INEE(International Network for Education in Emergencies);2009 , http:// www.ineesite.org/en
• Celep, Z. (2003). “Seismic Safety of the Regional School Building of Bingöl”, Accessed July 2015,
• Turkish Earthquake Code, (2007), Turkish earthquake code-specification for structures to be built in disaster areas, Turkey
• Aydınoğlu, M. N., (2007), “A response spectrum-based nonlinear assessment tool for practice: incremental response spectrum analysis (IRSA)”, ISET Journal of Earthquake Technology, 44(1), 169-192.
• Doran, B., Akbaş, B., Sayım, İ., Fahjan, Y., Alacalı, S.,N., (2011), “Uzun periyotlu bir yapıda yapısal sağlık izlemesi ve deprem performansının belirlenmesi”, 1. Turkey Conference on Earthquake Engineering and Seismology, Ankara, Turkey, October.
• Kutanis, M., Boru, O.,E., (2014), "The need for upgrading the seismic performance objectives", Earthquakes and Structures, 7(4), 401-414.
• Ilki, A., Celep, Z., (2011), “Earthquake safety of RC buildings” 1. Turkish EarthquakeEngineeringand Seismology Conference, Ankara, Turkey, October
• Özer, E., (2007), “Performance based design and assessment”, ITU, Lectures Notes
• Fajfar, P., (1999), “Capacity spectrum method based on inelastic demand spectra”, Earthquake Engineering and Structural Dynamics, 28(9), 979-993.
• Chopra, A.K. and Goel, R.K., (2002), “A modal pushover analysis procedure for estimating seismic demands for buildings”, Earthquake Engineering and Structural Dynamics, 31(3), 561–582.
• Jianmeng, M., Changhai, Z., Lili, X., (2008), “An improved modal pushover analysis procedure for estimating seismic demands of structures”, Earthquake Engineering and Engineering Vibration, 7(1), 25-31.
• Freeman, S. A. (1998, September). The capacity spectrum method as a tool for seismic design. In Proceedings of the 11th European conference on earthquake engineering (pp. 6-11).