SEISMIC PERFORMANCE OF A RC SCHOOL BUILDING CONSIDERING DIFFERENT SOIL CLASSES

Abstract

Occurrence of major material damage and loss of lives due to earthquakes in our country show that the earthquake safety of existing building stock is not enough. It is important of great importance to determine seismic performance of existing buildings. However, some building types have great importance such as school buildings, hospitals etc. A reliable performance estimation is very important to achieve seismic safety of this type of buildings. Seismic performance of a building depends on not only its behavior but also the soil class on which it is constructed.

 

In this study, performance estimation of an existing RC school buildings has been conducted considering different soil types. The aim of this study is to determine the seismic behavior of school type RC buildings considering different soil classes. For this purpose, a five-story reinforced concrete (RC) school building was selected to evaluate the seismic performance and this building designed according to Turkish Seismic Code (TSC) 1975. The seismic performance of the existing building is estimated according to TSC 2007 using Nonlinear Static Procedure (NSP) considering different soil classes as A, B, C and D. NSP is also referred to as Pushover Analysis Method. Pushover curve is transformed to modal capacity diagram and the inelastic displacement demand of the building is estimated by intersecting the modal capacity diagram and the behavior spectrum, which is estimated by transforming the design spectrum given in TSC 2007. Soil class is considered by changing the corner periods of design spectrum. Thus, performance level is estimated for the design earthquake by using the design spectrum.

Keywords

• Seismic performance,reinforced concrete,pushover analysis,soil class

References

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