Analytical study of seismic performance of retrofitted unreinforced masonry walls using steel plates

Document Type : Research Article


1 Faculty of Civil Engineering, Shahrood University of Technology, Shahrood, Iran

2 Faculty of Civil engineering, Shahrood University of Technology, Shahrood, Semnan, Iran


In recent earthquakes, masonry structures experienced a lot of damage due to high weight and low ductility and low shear strength. Retrofitting of masonry wall is challenges in urban construction. The unreinforced masonry walls cannot resistant to the earthquake and their basic weakness is in ductility. The wall ductility is reduced when the aspect ratio of wall decrease in comparison to the wall strength. The purpose of this study is to investigate the seismic performance of unreinforced masonry walls with two aspect ratio of 0.5 and 0.7 with scale 1:2 and retrofitting of masonry walls using different layouts of steel ties. The analytical evaluation of seismic behavior of unreinforced masonry wall has been done using ABAQUS finite element software. The force-displacement curve of specimen was bilinearized FEMA356 method. Analytical results were compared in terms of ultimate strength, effective stiffness and ductility. The ultimate strength, effective stiffness and ductility of retrofitted specimens using steel tie increased in comparison to the referenced specimen.


Main Subjects

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