The city of Lima located on the coasts of the ocean and belonging to the ring of fire of the Pacific; It has a high probability of a high intensity earthquake, in Lima lives a third of the population of Peru, due to the high concentration of people, low-rise housing and low cost are very common, the 70% of the houses in Lima are of masonry. The seismic code recommends buildings with this system and gives us values of their results to be able to use them. The Pandereta brick is a type of masonry that was created for partitions for rooms because they are lightweight and low cost.
Some people of low-income use these bricks to build their homes, some of which are self-built without engineering because those materials are not adequate to resist an earthquake.
The retrofitting of masonry walls of homes is a method which is rarely used due to the high price in the structural evaluation. In this research, experimental wall data is used, and the typical distribution of a two-level house is used.
To obtain better values, three models were analyzed. The first analysis one is the housing without retrofitting; the second analysis is with all walls retrofitted and the third is in the housing with 50% of the total walls retrofitted. With three points we interpolate the percentage of retrofitting of the house.
Keywords: Masonry housing, performance point, retrofitting, and steel mesh