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Post-Tensioned Mass Timber Systems

https://research.thinkwood.com/en/permalink/catalogue1256
Year of Publication
2017
Topic
Design and Systems
Seismic
Application
Frames
Shear Walls
Author
Iqbal, Asif
Popovski, Marjan
Organization
Structures Congress
Publisher
American Society of Civil Engineers
Year of Publication
2017
Country of Publication
United States
Format
Conference Paper
Application
Frames
Shear Walls
Topic
Design and Systems
Seismic
Keywords
North America
New Zealand
Post-Tensioning Cables
Post-Tensioned
Multi-Story
Lateral Load Resisting Systems
High Seismic Regions
Language
English
Conference
Structures Congress 2017
Research Status
Complete
Notes
April 6–8, 2017, Denver, Colorado
Summary
A new type of mass timber structural system has been developed in New Zealand over the last decade. Timber members made of engineered wood products are used in combination with post-tensioning cables to produce highly efficient structural components suitable for multi-story moment resisting frames or shear wall-based lateral load resisting systems. Both systems are particularly useful in structures designed in high seismic regions. The post-tensioning also ensures self-centering of the components and the structural systems after a seismic event. In addition to the post-tensioning, the systems can use energy dissipating devices within the connections that further enhance the ductility of the systems and make them good candidates for low damage structural applications. Extensive experimental and numerical studies have been conducted to determine the performance of these systems and design procedures have been developed for practical applications. In an effort to bring this system closer to the North American designers, this paper contains a summary of the evolution of the concept and the most important research projects and findings to date. In addition, a number of applications within and outside New Zealand are reviewed to demonstrate the applicability of the concept. Finally, potential and recent initiatives for adoption of the technology in North America are discussed.
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