Masonry structures have always been used worldwide due to the simplicity of construction and low cost. In recent years, we have seen damages caused by earthquakes that resulted in severe damage to these structures; Therefore, it is important to investigate their behavior to identify and improve their performance against earthquakes. The purpose of this article is to evaluate the seismic behavior of 20 cm masonry walls with two types of straight and block brickwork in unreinforced and reinforced with CFRP sheets against earthquake force, both walls were reinforced by the cross method, as well as the straight wall by the combination of cross strips and The horizontal was also strengthened. For this purpose, by using simplified micro-modelling using the finite element method in Abaqus software and verifying it with laboratory samples, the desired walls were modelled under seismic load and their seismic parameters were investigated with the help of the hysteresis curve of the walls. In unreinforced walls, the parameters of plasticity coefficient, bearing capacity, and wasted energy in straight brickwork were more and its strength loss was less than in block brickwork. But in the case of cross-strengthening, the wall with block brickwork had more ductility, effective stiffness, load capacity, wasted energy and strength loss than the wall with straight brickwork. In general, the effect of reinforcement sheets on the seismic parameters of the straight wall was more than that of the block wall. Also, the cross-reinforcement method performed somewhat better than the combined method only in terms of ductility coefficient and strength loss.
Masonry structures have always been used worldwide due to the simplicity of construction and low cost. In recent years, we have seen damages caused by earthquakes that resulted in severe damage to these structures; Therefore, it is important to investigate their behavior to identify and improve their performance against earthquakes. The purpose of this article is to evaluate the seismic behavior of 20 cm masonry walls with two types of straight and block brickwork in unreinforced and reinforced with CFRP sheets against earthquake force, both walls were reinforced by the cross method, as well as the straight wall by the combination of cross strips and The horizontal was also strengthened. For this purpose, by using simplified micro-modelling using the finite element method in Abaqus software and verifying it with laboratory samples, the desired walls were modelled under seismic load and their seismic parameters were investigated with the help of the hysteresis curve of the walls. In unreinforced walls, the parameters of plasticity coefficient, bearing capacity, and wasted energy in straight brickwork were more and its strength loss was less than in block brickwork. But in the case of cross-strengthening, the wall with block brickwork had more ductility, effective stiffness, load capacity, wasted energy and strength loss than the wall with straight brickwork. In general, the effect of reinforcement sheets on the seismic parameters of the straight wall was more than that of the block wall. Also, the cross-reinforcement method performed somewhat better than the combined method only in terms of ductility coefficient and strength loss.