SEISMIC PERFORMANCE OF A RC SCHOOL BUILDING CONSIDERING DIFFERENT SOIL CLASSES

Abstract

Occurrence ofmajor material damage and loss of lives due to earthquakes in our country showthat the earthquake safety of existing building stock is not enough. It isimportant of great importance to determine seismic performance of existingbuildings. However, some building types have great importance such as schoolbuildings, hospitals etc. A reliable performance estimation is very importantto achieve seismic safety of this type of buildings. Seismic performance of abuilding depends on not only its behavior but also the soil class on which itis constructed. In this study, performance estimation of an existing RC school buildingshas been conducted considering different soil types. The aim of this study isto determine the seismic behavior of school type RC buildings consideringdifferent soil classes. For this purpose, a five-story reinforced concrete (RC)school building was selected to evaluate the seismic performance and thisbuilding designed according to Turkish Seismic Code (TSC) 1975. The seismicperformance of the existing building is estimated according to TSC 2007 usingNonlinear Static Procedure (NSP) considering different soil classes as A, B, Cand D. NSP is also referred to as Pushover Analysis Method. Pushover curve istransformed to modal capacity diagram and the inelastic displacement demand ofthe building is estimated by intersecting the modal capacity diagram and thebehavior spectrum, which is estimated by transforming the design spectrum givenin TSC 2007. Soil class is considered by changing the corner periods of designspectrum. Thus, performance level is estimated for the design earthquake byusing the design spectrum.