Experimental investigation on the effectiveness of lateral restrainers to the vertical steel in reinforced masonry walls under axial compression

Reinforced masonry (RM) walls are mostly used in low to mid rise residential/industrial buildings cyclonic and seismic regions. They conventionally constructed with grout embedded vertical steel reinforcements positioned the middle of hollow blocks. However, these reinforcing bars rarely detailed lateral restrainers, which considered essential design standards avoid buckling bars. This research investigates effectiveness restrainers axial compression resistance RM by testing 128 under concentric eccentric different reinforcement configurations. The tested (190 mm thick × 600 wide) consisted various types detailing without strengths (25–50 MPa), three heights (800 mm, 1400 2400 mm). Two were for each configuration, out one was determine ultimate strength other acquire strength, deformation wall, strain on surfaces face-shell. experimental results revealed that has significantly contributed capacity, whilst restrainer had no significant effect either development or overall walls. Under compression, measurements indicated irrespective absence presence remained throughout loading history evidence buckling. Effects slenderness eccentricity also evaluated compression. It can be concluded from this designed resist forces need not treated as unreinforced (URM) if surrounded well compacted grout.