Skip header and navigation

10 records – page 1 of 1.

Alternative Load Path Analyses for Mid-Rise Post and Beam Mass Timber Building

https://research.thinkwood.com/en/permalink/catalogue2448
Year of Publication
2020
Topic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Columns
Beams

Blast Testing of Loaded Cross-Laminated Timber Structures

https://research.thinkwood.com/en/permalink/catalogue1234
Year of Publication
2018
Topic
Mechanical Properties
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Weaver, Mark
Newberry, Charles
Podesto, Lisa
O’Laughlin, Casey
Organization
Structures Congress
Publisher
American Society of Civil Engineers
Year of Publication
2018
Country of Publication
United States
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Mechanical Properties
Design and Systems
Keywords
Blast Tests
Airblast Loads
Axial Load
Panels
Load Distribution
Quasi-Static
Language
English
Conference
Structures Conference 2018
Research Status
Complete
Notes
April 19–21, 2018, Fort Worth, Texas
Summary
Results from a series of blast tests performed in October 2016 on three two-story, single-bay cross-laminated timber (CLT) structures demonstrated the ability of CLT construction to resist airblast loads in a predictable fashion. These tests were performed on structures without superimposed load to limit inertial resistance. Subsequently, a follow-on series of tests was performed to investigate the response of axially-loaded CLT construction. Panels damaged during the preceding test were removed and replaced. Axial load was applied using precast concrete blocks to simulate the loaded condition of a five-story building at the first-floor front panel of the structures. These test structures were exposed to two shots: the first was designed to keep the structures within their respective elastic ranges while the second was designed to push the structures beyond their elastic limits. Reflected pressure and peak deflections were recorded at the front panels of the test structures to document the two-way panel load distribution behavior under a dynamic load event and the clearing of the shock wave. Prior to conducting the blast tests, a small number of tests were performed on a load tree test apparatus to aid in test planning by investigating the post-peak response of individual CLT panels of various lengths to quasi-static out-of-plane and axial loads applied simultaneously. This paper provides an overview of the results obtained from both the quasi-static and blast tests of axially-loaded CLT. Additionally, the paper compares CLT structure, component, and connection response across the suite of data. Conclusions are offered to assist engineers in the design of load bearing CLT construction exposed to airblast loads.
Online Access
Payment Required
Resource Link
Less detail

Diaphragmatic Behaviour of Hybrid Cross-Laminated Timber Steel Floors

https://research.thinkwood.com/en/permalink/catalogue1909
Year of Publication
2018
Topic
Seismic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Steel-Timber Composite
Application
Floors

Diaphragmatic Behaviour of Hybrid Cross-Laminated Timber Steel Floors

https://research.thinkwood.com/en/permalink/catalogue2039
Year of Publication
2018
Topic
Design and Systems
Mechanical Properties
Seismic
Material
CLT (Cross-Laminated Timber)
Steel-Timber Composite
Application
Floors

Load Distribution in Multi-Dowel Timber Connections Under Moment Loading - Integrative Evaluation of Multiscale Experiments

https://research.thinkwood.com/en/permalink/catalogue1499
Year of Publication
2016
Topic
Connections
Mechanical Properties
Material
LVL (Laminated Veneer Lumber)
Author
Bader, Thomas
Schweigler, Michael
Hochreiner, Georg
Eberhardsteiner, Josef
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
LVL (Laminated Veneer Lumber)
Topic
Connections
Mechanical Properties
Keywords
Load Distribution
Steel Dowels
Steel Plates
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 244-252
Summary
The load distribution in multi-dowel timber connections under bending moments was investigated by means of an integrative evaluation of a hierarchically organized test program, which encompassed component tests as well as single-dowel and multi-dowel connection tests. It was demonstrated that the anisotropic material behaviour of Laminated Veneer Lumber, and consequently of wood in general, leads to a non-uniform load distribution among the dowels, even for multi-dowel connections with a circular arrangement of dowels. Model predictions from this study highlight inefficiencies of the simplified calculation approach, based on the polar moment of inertia, i.e., based on isotropic theory. Loads of dowels loaded parallel to the grain were found to be underestimated by up to 50%. Through the hierarchically organized experimental campaign with full-field deformation measurement techniques, load distribution effects could be related to the orthotropic material behaviour of wood expressed in terms of load-to-grain angle dependent slip curves of single-dowel connections.
Online Access
Free
Resource Link
Less detail

New Guidelines for Design of Timber Concrete Systems for Point and Line Loads

https://research.thinkwood.com/en/permalink/catalogue1688
Year of Publication
2016
Topic
Mechanical Properties
Material
Timber-Concrete Composite
Application
Floors
Author
Monteiro, Sandra
Dias, Alfredo
Lopes, Sérgio
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Timber-Concrete Composite
Application
Floors
Topic
Mechanical Properties
Keywords
Point Loads
Line Loads
Load Distribution
Numerical Model
Experimental Tests
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4229-4236
Summary
Point and line loads are common load cases in slabs, however their effects on timber-concrete composite (TCC) slabs are not fully known. Hence, the importance of investigating the associated structural behaviour and developing technical design rules. For this purpose, an investigation including experimental tests and theoretical analyses was performed. Five composite real scale specimens were built, each one associated with a different parameter whose effect on the load distribution was intended to be analysed. Each specimen was subjected, at a time, to point and line loads over each beam at different locations. Numerical modelling showed good agreement with experimental results and give way to a parameter study. In general, the beam over which the load was applied received the highest share of load and the distribution for the remaining beams is significantly affected by the span.
Online Access
Free
Resource Link
Less detail

Nonlinear Static Seismic Response of a Building Equipped with Hybrid Cross-Laminated Timber Floor Diaphragms and Concentric X-Braced Steel Frames

https://research.thinkwood.com/en/permalink/catalogue2761
Year of Publication
2021
Topic
Seismic
Material
CLT (Cross-Laminated Timber)
Steel-Timber Composite
Application
Floors
Author
Roncari, Andrea
Gobbi, Filippo
Loss, Cristiano
Organization
University of British Columbia
University of Trento
Publisher
MDPI
Year of Publication
2021
Country of Publication
Canada
Italy
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Steel-Timber Composite
Application
Floors
Topic
Seismic
Keywords
Seismic Design
Hybrid Structures
Lateral Resistance
Semi-rigid Diaphragms
Load Distribution
Seismic Performance
Pushover Analysis
Nonlinear Static Analysis
Finite Element Model
Language
English
Research Status
Complete
Series
Buildings
Summary
Simplified seismic design procedures mostly recommend the adoption of rigid floor diaphragms when forming a building’s lateral force-resisting structural system. While rigid behavior is compatible with many reinforced concrete or composite steel-concrete floor systems, the intrinsic stiffness properties of wood and ductile timber connections of timber floor slabs typically make reaching a such comparable in-plane response difficult. Codes or standards in North America widely cover wood-frame construction, with provisions given for both rigid and flexible floor diaphragms designs. Instead, research is ongoing for emerging cross-laminated-timber (CLT) and hybrid CLT-based technologies, with seismic design codification still currently limited. This paper deals with a steel-CLT-based hybrid structure built by assembling braced steel frames with CLT-steel composite floors. Preliminary investigation on the performance of a 3-story building under seismic loads is presented, with particular attention to the influence of in-plane timber diaphragms flexibility on the force distribution and lateral deformation at each story. The building complies with the Italian Building Code damage limit state and ultimate limit state design requirements by considering a moderate seismic hazard scenario. Nonlinear static analyses are performed adopting a finite-element model calibrated based on experimental data. The CLT-steel composite floor in-plane deformability shows mitigated effects on the load distribution into the bracing systems compared to the ideal rigid behavior. On the other hand, the lateral deformation always rises at least 17% and 21% on average, independently of the story and load distribution along the building’s height.
Online Access
Free
Resource Link
Less detail

Performance of Timber-Concrete Portable Bridge with Circular Hollow Section Connectors

https://research.thinkwood.com/en/permalink/catalogue1752
Year of Publication
2016
Topic
Mechanical Properties
Connections
Serviceability
Material
Timber-Concrete Composite
Application
Bridges and Spans
Author
Lacis, Raitis
Ozola, Lilita
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Timber-Concrete Composite
Application
Bridges and Spans
Topic
Mechanical Properties
Connections
Serviceability
Keywords
Prefabricated
Proof-Load Tests
Deflection
Bending Strains
Bending Stresses
Transversal Load Distribution
Dynamic Amplification Factor
Field Measurements
FEM
Circular Hollow Connectors
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4997-5005
Summary
This paper presents the research results of a timber-concrete composite portable bridge according to the tests of full-scale structure. Portable timber-concrete bridges can be used for permanent or temporary locations in rural areas such as forests, agricultural fields, mineral extraction pits, military objects and others. All structural elements of...
Online Access
Free
Resource Link
Less detail

Transversal Load Sharing in Timber-Concrete Floors - Experimental and Numerical Investigations

https://research.thinkwood.com/en/permalink/catalogue1617
Year of Publication
2016
Topic
Mechanical Properties
Material
Timber-Concrete Composite
Application
Floors
Author
Kieslich, Hubertus
Holschemacher, Klaus
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Timber-Concrete Composite
Application
Floors
Topic
Mechanical Properties
Keywords
Non-linear Analysis
Load Distribution
Finite Element Model
Pushout Testing
Full Scale
Bending Tests
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 2377-2386
Summary
Timber-steel hybrid beams have already been proposed, tested and analyzed for their use in frame multistorey buildings. Although these beams can be combined with any type of structural floor, their use with concrete decks opens the door to new and promising structural strategies. Present-day timber-concrete floors are a good solution for contemporary multi-storey buildings. They provide in-plane stiffness, enough mass for sound isolation and can be optimized from a structural performance point of view. Meanwhile hybrid beams could provide lightness, reduced structural depth, reduce the creeping behaviour and make frame semi-rigid joints easy to build. The goal is therefore the development of a combined system of hybrid beams and concrete floors, proposing prefabricated or semi-prefabricated timber-steel-concrete ribbed elements that could make the most of all this potential. First design concepts and planned tests are presented in this paper.
Online Access
Free
Resource Link
Less detail

10 records – page 1 of 1.