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This paper presents a scheme of double-plane shear testing to investigate the shear transmission mechanism of strain-hardening cementitious composite (SHCC) after crack opening; the focus is on the shear stress transfer behaviour on the crack surface of the SHCC, contributed by both the contact effect of the matrix and the fibre bridging effect on the crack surface. The experimental results demonstrate that the transferred shear stress on the crack surface of the SHCC is contributed by both the contact effect of the matrix and the fibre bridging effect on the crack surface until peak shear stress, whereas after the separation of the crack surfaces, it is influenced solely by the fibre bridging effect. It is confirmed that the fibre bridging effect on the crack surface of SHCC has considerable influence in the shear fracture behaviour of SHCC. [ABSTRACT FROM AUTHOR]

This paper presents a numerical approach for evaluating the shear failure behavior of strain hardening cementitious composite (SHCC) member. The developed approach can clarify the respective contributions of both contact stress and fiber bridging stress for the shear stress transfer behavior on crack surface of SHCC member, which thus can disclose the contribution of fibers to local shear of SHCC member. In the numerical approach, a shear stress transfer model and shear lattice system are proposed, in which the shear lattice system can appropriately express the shape of crack surface, and the shear stress transfer model can accurately quantify the transferred shear stress on the crack surface of SHCC member, focusing on the contribution from both matrix’s contact effect and fiber bridging effect respectively. The effectiveness of the numerical approach is confirmed through the comparison between the experimental and numerical results. [ABSTRACT FROM AUTHOR]