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Experimental Investigations of Post-Tensioned Timber Frames with Advanced Seismic Damping Systems

https://research.thinkwood.com/en/permalink/catalogue464
Year of Publication
2012
Topic
Mechanical Properties
Seismic
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Application
Wood Building Systems
Author
Smith, Tobias
Carradine, David
Di Cesare, Antonio
Carlo Ponzo, Felice
Pampanin, Stefano
Buchanan, Andrew
Nigro, Domenico
Organization
Structures Congress
Publisher
American Society of Civil Engineers
Year of Publication
2012
Country of Publication
United States
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Application
Wood Building Systems
Topic
Mechanical Properties
Seismic
Keywords
Damping
Energy Dissipation
Full Scale
Post-Tensioning
Language
English
Conference
Structures Congress 2012
Research Status
Complete
Notes
March 29-31, 2012, Chicago, Illinois, United States
Summary
This paper describes initial experimental testing to investigate feasible sources of passive damping for the seismic design of post-tensioned glue laminated timber structures. These innovative high performance structural systems extend precast concrete PRESSS technology to engineered wood structures, combining the use of post-tensioning bars or cables with large post-tensioned timber members. The combination of these two elements provides elastic recentering to the structure while the addition of damping using a specialised energy dissipation system gives the desirable `flag shaped' hysteretic response under lateral loading. Testing has been performed on a full scale beam-column joint at the University of Basilicata in Italy in a collaborative project with the University of Canterbury, New Zealand. The experimental testing uses engineered wood products, extending the use of laminated veneer lumber (LVL) structures tested in New Zealand to testing of glue laminated timber (glulam) structures in Italy. Current testing is aimed at further improvement of the system through additional energy dissipation systems.
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Tall Cross-Laminated Timber Building: Design and Performance Session WW300 Experimental and Modeling Studies on Wood Frame Buildings

https://research.thinkwood.com/en/permalink/catalogue618
Year of Publication
2014
Topic
Design and Systems
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Walls
Wood Building Systems
Author
Dolan, Daniel
Bordry, Vincent
Pei, Shiling
van de Lindt, John
Organization
Structures Congress
Publisher
American Society of Civil Engineers
Year of Publication
2014
Country of Publication
United States
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Walls
Wood Building Systems
Topic
Design and Systems
Seismic
Keywords
Damping
Multi-Story
Ductility
Cost
Fire Resistance
Language
English
Conference
Structures Congress 2014
Research Status
Complete
Notes
April 3-5, 2014, Boston, Massachusetts, United States
Summary
Cross-laminated timber (CLT) is widely perceived as the most promising option for building high-rise wood structures due to its structural robustness and good fire resistance. While gravity load design of a tall CLT building is relatively easy to address because all CLT walls can be utilized as bearing walls, design for significant lateral loads (earthquake and wind) can be challenging due to the lack of ductility in current CLT construction methods that utilize wall panels with low aspect ratios (height to length). Keeping the wall panels at high aspect ratios can provide a more ductile response, but it will inevitably increase the material and labor costs associated with the structure. In this study, a solution to this dilemma is proposed by introducing damping and elastic restoring devices in a multi-story CLT building to achieve ductile response, while keeping the integrity of low aspect ratio walls to reduce the cost of construction and improve fire resistance. The design methodology for incorporating the response modification devices is proposed and the performance of the as-designed structure under seismic is evaluated.
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