During the last 15 years 18 simple masonry systems, scaled 1:2 and 1:1, have been tested by using a shaking table. The masonry systems were of different geometrical configurations and partly strengthened by various techniques, including hysteretic devices. For each masonry system and each shaking absorbed energies have been computed from recorded response signals and appropriate indices have been worked out in order to allow comparisons. These point out the positive effect induced by horizontal tendons in allowing a regular evolution of the response, without sudden stiffness decreases and the efficiency of hysteretic devices to control damage and increase available ductility.
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