The behavior of masonry assemblages and masonry-infilled R/C frames subjected to combined vertical and cyclic horizontal seismic-type loading

The present systematic study aims to propose valid numerical models that can realistically approximate the shear behavior of masonry assemblages and the hysteretic behavior of masonry infilled reinforced concrete (R/C) frames when they are subjected to combined vertical and horizontal cyclic loads. Successful numerical simulations are developed for the non-linear shear behavior of masonry joints and the non-linear behavior and ultimate strength of relatively weak Greek masonry piers; these are finally used, with the same materials and geometry, as infills in the R/C frames. A valid numerical model is proposed that can capture successfully the various observed non-linear response mechanisms that develop within the masonry infilled R/C frames when they are subjected to combined vertical and cyclic horizontal loads.