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Cross Laminated Timber Construction for Resisting Lateral Loads on Six Level Buildings

https://research.thinkwood.com/en/permalink/catalogue1846
Year of Publication
2018
Topic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Walls
Floors
Wood Building Systems
Author
Chapman, John
Publisher
New Zealand Timber Design Society
Year of Publication
2018
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Walls
Floors
Wood Building Systems
Topic
Design and Systems
Keywords
Resistance
Lateral Load
Stress
Serviceability
Shear
Research Status
Complete
Series
New Zealand Timber Design Journal
Summary
The author’s intention is to contribute to the general discussion on timber multi-level commercial buildings. Interest in this topic is expected due to the environmental advantages of timber construction when compared to concrete and steel. This paper looks into three timber based systems for resisting lateral loads for buildings to six storeys, that will ensure relatively ‘open’ floor spaces. In this paper, three proposed lateral load resisting systems are termed ‘frame’, ‘circular core’, and ‘shear walls’. Only low stresses occur in the three systems and they can be made with timber below ‘structural grade’ which is more economical. The concept of reinforced concrete ‘socket’ foundations, for returning columns to their original locations, is briefly explained. The paper considers the lateral load resisting systems from the viewpoints of structure, architecture and economics. Architecturally, the most flexible arrangement would be a ‘frame’ system on each external wall. It would leave the floor areas free except for internal columns; and windows can be placed within the frame construction allowing light to enter the building. Assumptions have been made, such as the deflections due to joint slippages and these will, at some stage, need to be studied and their accuracy checked.
Online Access
Free
Resource Link
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Integrating CLT Panels for Building Cores: Introduction, Rocking Response, & Foundation Connection Testing

https://research.thinkwood.com/en/permalink/catalogue1732
Year of Publication
2016
Topic
Seismic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Chapman, John
Ma, Quincy
Pham, Viet
Whitehead, Jaimie
Year of Publication
2016
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Seismic
Design and Systems
Keywords
High-Rise
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4764-4773
Summary
This research involves testing for a new structural system based on CLT (cross-laminated timber) panels to provide taller, economical and more useful timber high-rise buildings. The point of difference of the system compared to recently constructed CLT high-rise buildings is a central core which is comprised of vertically aligned but integrated CLT panels. The central core, which runs the full height of the building, is effectively a very large vertical cantilever with a rectangular hollow section, and is the main element for resisting lateral forces. This arrangement produces taller timber buildings with more open floor areas. For seismic events, the core is designed to a ‘damage avoidance philosophy’, to re-centre, and to minimise costs of building repair. The testing reported in the paper is for the ‘fuse’ connections of the core to the foundations which are designed to be ‘replaced in place’ and provide the required ductility to the timber which is a nonductile building material.
Online Access
Free
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Integrating Cross-Laminated Timber Panels to Construct Buildings To 20 Levels

https://research.thinkwood.com/en/permalink/catalogue456
Year of Publication
2014
Topic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Chapman, John
Year of Publication
2014
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Design and Systems
Keywords
Multi-Storey
Integrated Elements
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
A worldwide interest in timber multi-storey buildings is expected due to the environmental advantages of timber construction when compared to buildings in concrete and steel. Cross-laminated Timber, or CLT, was developed in the early 1990’s and glues and clamps timber planks in alternate layers to form large panels. The cross-laminating ensures reliable strength and stability. CLT construction has been used successfully for the nine storey Murray Grove Stadhaus building in London and the ten storey Forte building in Melbourne. The paper proposes a new type of structural system that utilises CLT for buildings to twenty levels. The floor plan with a central rectangular core and columns at the perimeter is similar to a typical RC commercial building. There are considerably more open spaces than for existing CLT multi-level buildings which rely on multiple shear walls.
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Free
Resource Link
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Timber Multi-Level Buildings to 20 Levels Based on a Central Core of Integrated CLT Panels

https://research.thinkwood.com/en/permalink/catalogue1804
Year of Publication
2018
Topic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Hybrid Building Systems
Wood Building Systems
Author
Chapman, John
Publisher
New Zealand Timber Design Society
Year of Publication
2018
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Hybrid Building Systems
Wood Building Systems
Topic
Design and Systems
Keywords
Panels
Multi-Storey
Integrated Elements
Structural Design
Tall Wood
Research Status
Complete
Summary
This research investigates a new structural system based on a central core of CLT (cross-laminated timber) panels to provide more useful multi-level timber buildings that are taller and with open floor areas. Because pinus radiata is a suitable timber for the manufacture of CLT panels, the system has the potential to add value to planted NZ forests and to earn overseas currency. Timber elements are proposed for the entire building structure – central core, columns, floor beams and floor joists. The vertical timber core is a very large square (or rectangular) hollow section that extends the full height of the building and is the main element for resisting lateral forces. Various aspects of the system are discussed in the paper. An analysis of the structure is reported and the paper concludes that the proposed structural system with CLT elements is suitable for buildings to at least twenty levels.
Online Access
Free
Resource Link
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