Research Articles | Challenge Journal of Structural Mechanics

The influence of different concrete classes on the seismic response of a seismically isolated building

Savaş Erdem, Khalid Saifullah, Ezgi Gürbüz, Marva Angela Blankson


DOI: https://doi.org/10.20528/cjsmec.2016.09.022

Abstract


In this study, an eight story seismically isolated building representing a mid-rise type building was employed to investigate the effect of usage of different concrete classes (C20, C25, C30, C40, and C50) on the seismic response of a seismically isolated building. The prototype fixed base buildings were converted to seismically isolated buildings by introducing rubber isolators at base level. Analyses were conducted by using two different isolation systems (QW5Tb3 and QW10Tb3).The modelling of conventional fixed base prototype seismically isolated buildings and their modal analyses were conducted on finite-element program SAP2000, whereas, modelling of seismically isolated buildings and nonlinear time-history analyses were conducted using 3D-BASIS program. Floor accelerations, Story shears and inter-story drift ratios were the key structural responses considered. The analysis results showed concrete strength have significant effects on the seismic behaviour of the structures. Seismically isolated buildings with isolation system having 5% characteristic strength, C40 and C50 concrete buildings showed less first floor accelerations as compared to the lower concrete class buildings. In addition, isolated buildings with C40 and C50 concrete showed much more inter-story drift ratio values at each floor level as compared to isolated buildings with C20, C25 and C30 concrete which showed values very close to one another.


Keywords


concrete class; seismic response; seismic isolation; reinforced concrete buildings

Full Text:

PDF

References


Bayraktar A, Altunisik AC, Turker T, Karadeniz H, Erdogdu S, Angin Z, Ozsahin TS (2014). Structural performance evaluation of 90 rc buildings collapsed during the 2011 Van-Turkey earthquakes. Journal of Performance of Construction Facilities, 6, 410-440.

Coskan S, Kartal ME, Bilir T (2015). The effect of concrete strengths obtained from 2011 Van Earthquake on the structural performance of RC Buildings. Arabian Journal for Science and Engineering, 41(10), 3817-3825.

http://dx.doi.org/10.1007/s13369-015-1997-y

Erberik MA (2008). Fragility-based assessment of typical mid-rise and low-rise RC buildings in Turkey. Engineering Structures. 30, 1360-1374.

http://dx.doi.org/10.1016/j.engstruct.2007.07.016

Erdem TR (2016). Performance evaluation of reinforced concrete buildings with softer ground floors. Gradevinar, 68, 39-49.

Golghate K, Vijay B, Amit S (2013). Pushover analysis of 4 storey's reinforced concrete building. International Journal of Latest Trends in Engineering and Technology, 2, 80-84.

Hwang J, Hsu T (2000). Experimental study of isolated building under trixial ground excitations. Journal of Structural Engineering, 126, 879-886.

http://dx.doi.org/10.1061/(ASCE)0733-9445(2000)126:8(879)

Kocak A (2005). Detailed examination of some existing buildings located at different districts of Istanbul and earthquake risk analysis of these existing buildings. In: The Earthquake Symposium, Kocaeli, 700-702.

Madden G, Symans M, Wongpraset N (2002). Experimental verification of seismic response of building frame with adaptive sliding base-isolation system. Journal of Structural Engineering, 128(8), 1037-1045,

http://dx.doi.org/10.1061/(ASCE)0733-9445(2002)128:8(1037)

Pant DR, Wijeyewickrema AC (2012). Structural performance of a base-isolated reinforced concrete building subjected to seismic pounding. Earthquake Engineering and Structural Dynamics, 41(12), 1709-1716.

http://dx.doi.org/10.1002/eqe.2158

Pereira N, Romao X (2016a). Material strength safety factors for the seismic safety assessment of existing RC buildings. Construction and Building Materials, 119, 319-328.

http://dx.doi.org/10.1016/j.conbuildmat.2016.05.055

Pereira N, Romao X (2016b). Assessment of the concrete strength in existing buildings using a finite population approach. Construction and Building Materials, 110, 106-110.

http://dx.doi.org/10.1016/j.conbuildmat.2016.02.021

Peruš I, Klinc P, Dolenc M, Dolšek M (2013). A web-based methodology for the prediction of approximate IDA curves. Earthquake Engineering & Structural Dynamics, 42, 43-60.

http://dx.doi.org/10.1002/eqe.2192

Rozman M, Fajfar P (2009). Seismic Response of a RC frame building designed according to old and modern practices. Bulletin of Earthquake Engineering, 7(3), 779-799.

http://dx.doi.org/10.1007/s10518-009-9119-4

Verderame, GM, Polese M, Mariniello C, Manfredi G (2010). A simulated design procedure for the assessment of seismic capacity of existing reinforced concrete buildings. Advances in Engineering Software, 14, 323-335.

http://dx.doi.org/10.1016/j.advengsoft.2009.06.011


Refbacks

  • There are currently no refbacks.