This paper presents the results of an ongoing research study on the sliding shear mechanism in reinforced masonry (RM) shear walls. An overview is presented of the current design procedure and its limitations. Findings of previous studies have been used to develop an analytical model that will allow to simulate the sliding shear response of RM shear walls subjected to earthquake ground shaking in a realistic manner, comparable with the results of experimental studies. The proposed analytical model is described in this paper, and the preliminary results are compared with the results of relevant experimental studies.
This paper presents results of an ongoing two-phase experimental research program on the out-of-plane instability of reinforced masonry (RM) shear walls under seismic loading. Phase 1 involves testing of five reinforced masonry uniaxial specimens under reversed cyclic tension and compression. The specimens represented the end zone of a RM shear wall. The purpose of the testing was to gain insight into the factors influencing out-of-plane instability. The design parameters considered in the study include longitudinal reinforcement ratio and height-to-thickness (h/t) ratio. An analytical model was proposed to estimate the magnitude of critical tensile strain leading to out-of-plane instability. Phase 2 involves experimental and
analytical study of full-scale RM shear wall specimens subjected to reversed-cyclic lateral loading, with the main objective to develop a rational analysis procedure and criteria for assessing the out-of-plane stability of these walls. This paper presents the results of Phase 1 experimental study and explains the Phase 2 experimental
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