Seismic Design and Numerical Validation of Post-Tensioned Timber Frames

Abstract eng:
A seismic design procedure and numerical sensitivity study of post-tensioned timber frames for multi-storey buildings is presented. The paper describes a displacement-based capacity design approach for jointed timber systems. Many aspects of the Direct Displacement-Based Design procedure for reinforced concrete are used for post-tensioned timber frames. An iterative design procedure is required due to the difficulty of predicting the elastic deformation and unique considerations are required for dynamic higher mode amplification of solid timber frames. Numerical models are used to investigate the seismic response of post-tensioned timber frames, with lumped rotational springs and frame members subjected to a suite of far field and near field earthquakes. The results of the numerical analyses are compared with the design values. Simplified analytical design equations are given.

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