In the FE model, masonry is considered as an isotropic material exhibiting damage in both tension and compression. Although it is a simplification, this assumption is commonly accepted in engineering practice \cite{tiberti2016comprehensive,milani2011safety,choudhury2015comprehensive}. As far as the non-linear behavior is considered, a concrete damage plasticity model (CDP) is adopted. Although CDP is originally conceived for isotropic fragile materials (typically concrete) \cite{valente2016non,castellazzi2017innovative,acito2014collapse}, it can be adapted to masonry because the orthotropy ratio in brickworks is moderate (around 1.2) under biaxial stress states in the compression–compression region \cite{page19818487,milani2006homogenised}. Orthotropy is lost in CDP but the use of isotropic model is accepted after an adaptation of the parameters to fit an average behavior between vertical and horizontal values
Through a 3D nonlinear time-history analysis, it can be affirmed that the isolated masonry is safe in terms of inter-story drift. The isolated structure is subjected to seven accelerograms according to Indonesian code, with the target location is Timika city, Papua island (0.6g of PGA). The FE model allows the application of two horizontal components of the earthquakes. A moderate damage is present, but only 0.28% as the average of maximum drifts, an outcome which assures the suitability of a low cost isolation. Also, the isolator deformation satisfies the limit of critical deformation. The average value obtained (111 mm) is smaller than the critical shear deformation, which is 300% of total rubber thickness (or 150 mm). This critical value is found through experimental researches \cite{van2012horizontal}\cite{de2011stability}. It indicates that the isolation system is capable of surviving the selected ground motions.