Experimental Study of Fly-ash Brick Masonry Under Subjected to Cyclic Loading

Fly ash bricks are new material and these bricks have certain advantages over clay bricks and no information regarding strength of these brick in masonry is available. Therefore goal of present work is to establish stress-strain curves for fly ash brick masonry having various H/T ratios under cyclic loadings. Also to establish envelope curve, common point curve and stability point curve. Since compressive strength of brick masonry depends upon various parameters viz. water absorption, mortar grade, slenderness ratio so these parameters are also taken into account. To achieve this above objective Fly ash brick masonry wall panel of size 800mm X 100 mm X 200 mm, 800mm X 100 mm X400 mm, 800mm X 100 mm X 600 mm and 800mm X 100mm X 800mm each constructed and cured for 28 days in 12 Nos., were tested for the study of stress-strain relationship of fly ash brick masonry under monotonic, cyclic, fatigue loadings. The effect of H/T ratio is also studied. In the experimental work 48 panels specimens were tested and compressive strength is calculated and stress-strain curve is plotted for each specimen and these curves are also normalized to each stress strain relationship. The results clearly indicate that the peak of the stress-strain curve obtained under cyclic compressive loading approximately coincides with the stress strain curve obtained under monotonic loading. Also cyclic load deformation history possesses locus of common points and locus of stability point Curves.