Seismic performance evaluation of unconfined dry stacked block masonry structure

•Hydraform Blocks.•Mechanical Properties.•Unconfined Dry Stacked Block Masonry.•Quasi-Static Cyclic Test.•Seismic Performance. Dry stacked block masonry is getting popularity and has auspicious future both in developed and developing countries. In this research work, it was aimed to appraise the seismic performance of unconfined dry stacked block masonry structure built with Hydraform blocks. The experimental work included the construction of a full-scale typical building and testing by using quasi-static reverse cyclic loading. The seismic parameters and behavior studied in this research work, include the force–deformation relationship, ultimate ductility factor, response modification factor, displacement amplification factor, energy dissipation, stiffness degradation, and structural performance levels. The visual assessment and analyses of the test data was scrutinized to construe and elucidate the damage patterns, and local and global behavior of the structure. Based on the results, the unconfined dry stacked block masonry structures can easily withstand against low to moderate seismic actions. The tolerance of self-interlocking blocks, in sliding and rotation in out-of-plane direction, enables it to act as energy dissipating devices and mitigates the chances of brittle shear failure.