Evaluation and comparison of seismic performance of industrially and traditionally constructed buildings in Iran, a case study of Yasooj

Abstract

Modern construction methods such as industrial ones have significantly increased the speed of buildings construction. Although these new methods are widely used in some countries, but the fundamental question is about their reliability and efficiency, especially in term of their seismic performance in comparison to the traditional construction methods. In this study, the seismic performance of constructed buildings using industrial construction methods is compared to the typical buildings in Iran. Besides, as main innovation, by defining building industrialization index, the economics of each structure has been also evaluated and the effect of this index on the structural performance has been studied. To this purpose, by conducting statistical studies on existing buildings, their information has been collected and three types of nonlinear finite element models including: eccentric steel braced frame, buckling restrained braced frame and tunnel formwork reinforced concrete shear wall have been prepared and compared. The near field earthquakes records have been used for nonlinear incremental dynamic analysis to obtain the corresponding fragility curves. The results showed that the tunnel formwork RC shear wall and buckling restrained braced frames, in addition to being more economical, also have more reliable collapse fragility curves and present better performance than the typical eccentric braced frames as they have a higher building industrialization index than the third structural system, respectively. Therefore, the modern buildings constructed by industrial methods have a lower casualty and economic risk due to the better seismic behavior compared to typical and traditional buildings.