Abstract
The behavior of prestressing tendons essentially affects the seismic responses of self-centering structures via providing restoring forces and controlling residual deformations. Conventionally, truss elements are chosen to model prestressing tendons when investigating the dynamic behavior of self-centering connections. However, truss elements fail to capture the piecewise configuration of prestressing tendons and underestimate the axial forces when self-centering connections are subject to large rotations. In order to analyze this error, two mathematical models are proposed for typical beam-to-column connections and column-to-base connections, respectively. To circumvent the drawbacks of truss elements, sliding cable elements based on rotated engineering strain are derived to modelling prestressing tendons in self-centering connections. Finally, numerical examples are presented to validate the effectiveness and accuracy of the proposed modelling method.
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