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6 records – page 1 of 1.

Construction Management for Tall CLT Buildings: From Partial to Total Prefabrication of Façade Elements

https://research.thinkwood.com/en/permalink/catalogue224
Year of Publication
2015
Topic
Cost
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Gasparri, Eugenia
Lucchini, Angelo
Mantegazza, Gabriele
Mazzucchelli, Enrico
Publisher
Taylor&Francis Online
Year of Publication
2015
Country of Publication
United Kingdom
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Cost
Design and Systems
Keywords
High-Rise
Prefabrication
Tall Wood
Language
English
Research Status
Complete
Series
Wood Material Science & Engineering
Notes
http://dx.doi.org/10.1080/17480272.2015.1075589
Summary
Cross-Laminated Timber is one of the most widely used engineered wood products, thanks to its numerous advantages, among which construction speed is the most appreciated, both by clients and by designers. However, construction scheduling compression refers exclusively to CLT structures, while the rest of the construction process still requires a longer phase to complete vertical enclosures. The aim of the research work presented in this paper is to outline advantages brought about when the degree of envelope prefabrication of tall timber buildings is increased. Results are presented in two sections. The first includes the definition of a case study together with an overview of possible technical details for entirely prefabricated façade solutions, ready to be installed without the need to work via scaffolds. The second deals with construction site management analysis for the case study building, where the determination of specific factors having an influence on time and costs is achieved by varying the prefabrication degree of the various façade configurations and repeating the analysis process. The main findings of this research work demonstrate that comprehensive façade prefabrication allows not only consistent compression of construction scheduling to be achieved, but also for immediate protection of wooden elements from weather agents.
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Free
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Innovative Construction System for Sustainable Buildings

https://research.thinkwood.com/en/permalink/catalogue140
Year of Publication
2015
Topic
Cost
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Floors
Shear Walls
Author
Loss, Cristiano
Piazza, Maurizio
Zandonini, Riccardo
Year of Publication
2015
Country of Publication
Switzerland
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Floors
Shear Walls
Topic
Cost
Design and Systems
Keywords
Prefabrication
Residential
Timber-Steel Hybrid
Numerical Analysis
Multi-Storey
Joints
Language
English
Conference
International Association for Bridge and Structural Engineering Conference
Research Status
Complete
Notes
September 23-25, 2015, Geneva, Switzerland
Summary
This paper deals with a contemporary integrated and sustainable construction technology for new residential buildings. Specifically, this research aims at developing innovative steel-timber hybrid structures which allow a rapid assembly of the individual prefabricated components, minimizing the construction times and limiting the costs of the work. The numerical analyses performed on a multi-storey building for social housing will be presented and discussed. The in-plane behaviour of the floors and shear walls will be analysed, considering in particular the types and arrangement of the different timber- and steel-timber joints. The connections to be used among the construction elements will be selected in order to develop a sufficient stiffness, ductility and bearing capacity according to the design criteria for seismic-resistant structures. These connections allow to enhance the on-site assembly operations, therefore working effectively also under harsh climatic conditions.
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Free
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Makerjoint, a New Concept for Joining Members in Timber Engineering – Strength Test and Failure Analyses

https://research.thinkwood.com/en/permalink/catalogue260
Year of Publication
2015
Topic
Connections
Mechanical Properties
Material
LVL (Laminated Veneer Lumber)
Author
Rebstock, Florian
Bomark, Peter
Sandberg, Dick
Year of Publication
2015
Country of Publication
Romania
Format
Journal Article
Material
LVL (Laminated Veneer Lumber)
Topic
Connections
Mechanical Properties
Keywords
CNC
Prefabrication
Failure Modes
Tensile Strength
Compressive Strength
Joints
Language
English
Research Status
Complete
Series
Pro Ligno
ISSN
2069-7430
Summary
The wood construction industries are becoming more focused on climate change and resource depletion, and individual and industrial consumption must reflect a greater degree of concern for the climate and environmental wellbeing. This paper presents a new concept for timber engineering, the purpose being to acquire information about the failure modes and the tensile and compressive strengths of two types of joint, the Simple Gooseneck and Thick Gooseneck, that can be used in a new concept for joining members in timber structures. This Makerjoint concept uses laminated veneer lumber (LVL) as nodes in regions with a pronounced non-uniform stress distribution and sawn timber in regions with a more uniform stress distribution. No metal fasteners or adhesives are used in the joint between timber and LVL. The concept is intended for joints using 3-axis CNC machinery and to be a system for on-site- and pre-fabrication of e.g. small houses, emergency shelters and exhibition stands. The joints have a higher compressive than tensile strength. The joints exhibited brittle failure in tension (beam and/or node failure) and buckling occurred in compression around the thinnest cross section of the beams. Suggestions are made for how the mechanical properties of the joints can be improved.
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Solid Timber Construction: Process, Practice, Performance

https://research.thinkwood.com/en/permalink/catalogue974
Year of Publication
2015
Topic
Market and Adoption
Cost
Design and Systems
Site Construction Management
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
NLT (Nail-Laminated Timber)
PSL (Parallel Strand Lumber)
Application
Wood Building Systems
Author
Smith, Ryan
Griffin, Gentry
Rice, Talbot
Year of Publication
2015
Country of Publication
United States
Format
Report
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
NLT (Nail-Laminated Timber)
PSL (Parallel Strand Lumber)
Application
Wood Building Systems
Topic
Market and Adoption
Cost
Design and Systems
Site Construction Management
Keywords
Off-site Construction
Off-site Prefabrication
Schedule
Quality
Safety
Language
English
Research Status
Complete
Summary
This project evaluates off-site solid timber production processes in the international solid timber industry. The Solid Timber Construction (STC) projects documented herein provide a test bed to evaluate project performance metrics attributed to off-site construction. This study also evaluates the contingent qualitative environmental, organizational and technological contextual factors related to STC. The study therefore: Investigates and documents STC projects to identify successful performance metric parameters: economics, schedule, scope, quality, risk, and worker safety. Compares this data to traditional site built construction to determine the estimated added value or negative impact of STC. Identifies qualitative contextual parameters including environment, organization and technology for successfully developing STC methods; Creates a model for data gathering for STC stakeholders to report their own performance parameters and thereby create a robust database of off-site projects in the future. Synthesizes holistic best processes and practices guide for the industry looking to engage in STC work.
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Free
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Structural and Thermal Behaviour of a Timber-Concrete Prefabricated Composite Wall System

https://research.thinkwood.com/en/permalink/catalogue247
Year of Publication
2015
Topic
Design and Systems
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Timber-Concrete Composite
Application
Walls
Author
Destro, Riccardo
Boscato, Giosuè
Mazzali, Ugo
Russo, Salvatore
Peron, Fabio
Romagnoni, Piercarlo
Publisher
ScienceDirect
Year of Publication
2015
Country of Publication
Netherlands
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Timber-Concrete Composite
Application
Walls
Topic
Design and Systems
Mechanical Properties
Keywords
Structural Behaviour
Thermal Behaviour
Prefabrication
Quasi-Static
In-Plane Tests
Language
English
Research Status
Complete
Series
Energy Procedia
Summary
This paper presents the analysis of the structural and thermal behaviour of an timber-concrete prefabricated composite wall system, the Concrete Glulam Framed Panel (CGFP) which is a panel made of a concrete slab and a structural glulam frame. The research analyses the structural performance with quasi-static in-plane tests, focused on the in-plane strength and stiffness of individual panels, and the thermal behaviour of the system with steady state tests using an hot box apparatus. The results validate the efficacy of proposed system ensuring the resistance and the dissipative structural behaviour through the hierarchy response characterized by the wood frame, the braced reinforced concrete panel of the singular module and by the rocking effects of global system.
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Vibration Properties of a Timber Floor Assessed in Laboratory and During Construction

https://research.thinkwood.com/en/permalink/catalogue488
Year of Publication
2015
Topic
Acoustics and Vibration
Material
CLT (Cross-Laminated Timber)
Application
Floors
Author
Jarnerö, Kirsi
Brandt, Anders
Olsson, Anders
Publisher
ScienceDirect
Year of Publication
2015
Country of Publication
Netherlands
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Floors
Topic
Acoustics and Vibration
Keywords
Damping Ratios
Eurocode
Mode shape
Natural Frequency
Prefabrication
Boundary Conditions
Language
English
Research Status
Complete
Series
Engineering Structures
Summary
In the present work the change in natural frequencies, damping and mode shapes of a prefabricated timber floor element have been investigated when it was integrated into a building structure. The timber floor element was first subjected to modal testing in laboratory with ungrounded and simply supported boundary conditions, and then in situ at different stages of building construction. The first five natural frequencies, damping ratios and mode shapes of the floor element and the entire floor were extracted and analysed. It may be concluded that the major change in natural frequencies occur as the floor element is coupled to the adjacent elements and when partitions are built in the studied room, the largest effect is on those modes of vibration that largely are constrained in their movement. The in situ conditions have a great influence on the damping, which depends on the damping characteristics of the supports, but also on the fact that the floor is integrated into the building and interacts with it. There is a slight increase of damping in the floor over the different construction stages and the damping values seem to decrease with ascending mode order.
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6 records – page 1 of 1.