Shaking table test of a multi-storey post-tensioned glulam building: numerical modelling

This paper describes the numerical modelling of post-tensioned timber frames (Pres-Lam) under seismic loading. From the conception of the post-tensioned jointed ductile concept it has been clear that the nature of its controlled rocking mechanism leant itself well to the use of a lumped plasticity approach in modelling. This combines the use of elastic elements with springs representing plastic rotations in the system. A 3-dimensional, 3-storey, 2/3rd scale multi-storey posttensioned timber frame building that was tested dynamically has been used in order to further evaluate the effectiveness of this technique when applied to post-tensioned timber. This work has proven the adequacy of the use of three numerical modelling programs, RUAUMOKO, SAP2000 and CDS - OpenSees, in providing accurate representation of the dynamic structural response of post-tensioned timber frames, with and without dissipative reinforcing.