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

Document Type : Research Article

Authors

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

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

Abstract

In recent earthquakes, masonry structures have not been resistant to earthquake due to high weight and low ductility and low shear resistance, and they have experienced a lot of damage. The improvement and strengthening of masonry structures is a serious discussion in urban construction. The walls of masonry are not resistant to the earthquake and their basic weakness is in ductility; its ductility is reduced when the length ratio increases to the wall height, in addition to the wall resistance. The purpose of this study is to investigate the seismic performance of masonry structures with two aspect ratio of 0.5 and 0.7 with scale 1: 2 and strengthening of masonry walls using different layouts of steel tie. The analytical evaluation of seismic behavior of reinforced masonry structures has been done using ABAQUS finite element software. In the FEMA356 method, the displacement curve of all samples is bilinear. Analytical results were compared in dominant resistance, effective stiffness and ductility. The ultimate strength, effective stiffness and ductility of strengthened specimens using steel tie increased in comparison to the control sample.

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