Abstract
This paper investigates the moment-rotation relationship of historic timber structures. In particular, the embedded compressive mechanism of these connections subjected to cyclic loading was investigated and a simplified equation for predicting the moment-rotation relationship was derived. The analytical model was validated by using the results of three 1/3.2-scaled mortise-through-tenon connections, including one intact connection and two connections with a gap between the mortise and through-tenon, tested under quasi-static loading. Then, the so-validated model was used for extensive parametric analysis by changing different parameters, such as the gap between the mortise and through-tenon, friction coefficient and material properties of wood. It is shown that the friction coefficient and elastic modulus perpendicular to grain along the radial direction of wood had an influence on the moment-rotation relationship of the connections, especially for the initial stiffness and ultimate moment of the connections, and both of them increased with a larger friction coefficient and elastic modulus. However, with the increment of the gap between the mortise and through-tenon, the initial stiffness and ultimate moment decreased gradually.
Published Version
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