The implications of post-tensioning losses on the seismic response of Pres-Lam frames
Item
Title (Dublin Core)
en-US
The implications of post-tensioning losses on the seismic response of Pres-Lam frames
Description (Dublin Core)
en-US
Since 2010, twelve post-tensioned timber (Pres-Lam) buildings have been constructed throughout the world. In high seismic areas, Pres-Lam technology typically combines unbonded post-tensioning tendons and supplemental damping devices to provide moment capacity to beam-column, wall-foundation or column-foundation connections. Over time creep within the timber elements leads to losses in post-tensioning forces reducing the connection moment capacity. This paper analyses how different post-tensioning loss scenarios, depending on the beam-column joint detailing, impact the building’s seismic response. Two case study buildings were designed and investigated using the Acceleration Displacement Response Spectrum (ADRS) method and Non-Linear Time History Analysis (NLTHA) to predict seismic performance. These buildings were considered to be located in areas of high and low seismic risk, leading to designs with and without the use of damping devices, respectively. The results show that the building with additional damping responded with similar peak displacements, even under extreme loss scenarios. In comparison, when supplemental damping was not used, peak displacements increased significantly with post tensioning losses.
Creator (Dublin Core)
Granello, Gabriele
Palermo, Alessandro
Pampanin, Stefano
Smith, Tobias
Sarti, Francesco
Publisher (Dublin Core)
en-US
New Zealand Society for Earthquake Engineering
Date (Dublin Core)
2018-06-30
Type (Dublin Core)
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
en-US
Article
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://bulletin.nzsee.org.nz/index.php/bnzsee/article/view/36
10.5459/bnzsee.51.2.57-69
Source (Dublin Core)
en-US
Bulletin of the New Zealand Society for Earthquake Engineering; Vol 51 No 2 (2018); 57-69
2324-1543
1174-9857
Language (Dublin Core)
eng
Relation (Dublin Core)
https://bulletin.nzsee.org.nz/index.php/bnzsee/article/view/36/22
Rights (Dublin Core)
en-US
Copyright (c) 2018 Gabriele Granello, Alessandro Palermo, Stefano Pampanin, Tobias Smith, Francesco Sarti
en-US
https://creativecommons.org/licenses/by/4.0
