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Concentrated Load Introduction in CLT Elements Perpendicular to Plane – Experimental and Numerical Investigations

https://research.thinkwood.com/en/permalink/catalogue1613
Year of Publication
2016
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Bogensperger, Thomas
Joebstl, Robert
Augustin, Manfred
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Bending Tests
Shear Tests
Concentrated Loads
Numerical Model
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 2341-2349
Summary
In this contribution bending and shear tests of cross laminated timber (CLT) plates under concentrated loads are presented. The so loaded structural members can fail either due to punching along a critical perimeter line in the vicinity of the concentrated load or in bending. Two test configurations were developed and investigated by linear elastic models. The obtained test results and observed failures as well as their correlation with the mechanical modeling are shown in this paper. The established numerical model was a 3D solid model with different material behavior for all acting stresses. The material behavior was implemented in a user subroutine for the FE program ABAQUS. By comparison of measured and computed load displacement curves numerical models could be discussed regarding their reliability and conclusions about missing input for an increasing accuracy of the model could be drawn.
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Cross Laminated Timber (CLT) Plane Structures Under Concentrated Loading from Point Supports - Shear Design including Reinforcements

https://research.thinkwood.com/en/permalink/catalogue1572
Year of Publication
2011
Topic
Design and Systems
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Mestek, Peter
Organization
Technical University of Munich
Year of Publication
2011
Country of Publication
Germany
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Topic
Design and Systems
Mechanical Properties
Keywords
Point-Supported
Concentrated Loads
Shear
Rolling Shear
Reinforcement
Screws
Biaxial
Language
German
Research Status
Complete
Summary
This thesis deals with the shear design of Cross Laminated Timber (CLT) elements stressed by concentrated loads which are locally reinforced by means of self-tapping screws with continuous threads. A simplified model is presented using an effective width for the calculation of the shear stresses in the vicinity of point supports or concentrated loads. Laboratory tests supply material-mechanical principles to determine the interaction of rolling shear stresses and compression perpendicular to the grain. In addition to experimental tests theoretical models are developed to examine the load bearing behaviour of CLT-elements reinforced by self-tapping screws. Preliminary tests with plate elements provide initial experience with these reinforcements under biaxial load transfer. Finally a design concept validated by means of the test results is proposed.
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Introduction of Concentrated Loads in CLT Wall Elements Parallel to Plane – Analytical Model for the Determination of Stresses and Simplification for Practice

https://research.thinkwood.com/en/permalink/catalogue1612
Year of Publication
2016
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Walls
Author
Bogensperger, Thomas
Augustin, Manfred
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Walls
Topic
Mechanical Properties
Keywords
Stress
Concentrated Loads
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 2332-2340
Summary
In this paper a proposal for the computation of stresses into orthotropic panels (e.g. CLT wall elements) caused by concentrated local load introduction in plane is derived on the basis of linear elastic mechanics. In practice the concept of effective width is often applied for the approximate determination of stresses. On the basis of the elastic solution in this contribution a proposal for the determination of the effective width is submitted. In addition a proposal for the stability verifications by means of the effective width is given..
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Ribbed-Plate Approach to Predict Static and Dynamic Responses of Timber Floor with Between-Joist Bracing

https://research.thinkwood.com/en/permalink/catalogue1737
Year of Publication
2016
Topic
Design and Systems
Serviceability
Acoustics and Vibration
Material
LVL (Laminated Veneer Lumber)
Application
Floors
Author
Khokhar, Aamir
Chui, Ying-hei
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
LVL (Laminated Veneer Lumber)
Application
Floors
Topic
Design and Systems
Serviceability
Acoustics and Vibration
Keywords
Flexural Rigidity
Static Deflection
Concentrated Loads
Natural Frequency
Analytical Model
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4827-4834
Summary
Installing between-joist bracing can be an economical and effective means of mitigating excessive vibration levels in wood floors associated to human discomfort. Effectiveness of between-joist bracing depends upon its own rigidity that accounts for the location of bracing, geometric arrangement and connection stiffness of installed...
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