Ductility of Reinforced Concrete Masonry Shear Walls under Seismic Loading

Abstract eng:
The possibility of achieving a high level of ductility by flexural yielding in fully grouted reinforced concrete masonry shear walls is evaluated. Six full-scale walls were tested to failure under reversed cyclic lateral loading to investigate the effects of the amount and the distribution of vertical reinforcement and the level of axial compressive stress on the inelastic behavior and ductility of reinforced masonry shear walls. The test results indicated that the top wall displacement at the onset of yielding of the vertical reinforcement was highly dependent on the amount of reinforcement and minimally affected by the level of axial compressive load. However, at maximum lateral loads, the wall displacements were less sensitive to the amount of vertical reinforcement and to the level of axial compression. Correspondingly, the displacement ductility was found to be very sensitive to the amount of vertical reinforcement compared to the level of axial compression. In general, high levels of ductility accompanied by relatively small strength degradation were observed for the test specimens.

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