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8 records – page 1 of 1.

Design Methodology Analysis of Cross-Laminated Timber Elements Subjected to Flexure

https://research.thinkwood.com/en/permalink/catalogue7
Year of Publication
2014
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Ceilings
Floors
Walls
Author
Vilguts, Aivars
Serdjuks, Dmitrijs
Mierinš, Imants
Publisher
Kaunas University of Technology
Year of Publication
2014
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Ceilings
Floors
Walls
Topic
Mechanical Properties
Keywords
Design
Flexural
FEM method
Testing
Panels
Research Status
Complete
Series
Journal of Sustainable Architecture and Civil Engineering
Summary
Cross-laminated timber is a structural material, which successfully used for structural purposes during the last years. The material is environmentally friendly and decreases CO2 emissions. Cross-laminated timber possesses a decreased level of anisotropy in comparison with solid and glued timber. It is significant for structural units working in bending. So, cross-laminated timber panels are considered as an object of investigation. Design methodology for cross-laminated timber panels subjected to flexure was presented. The methodology is based on LVS EN1995-1-1 and laminated plate theory. The presented methodology was tested experimentally and analytically. Behavior and mechanical properties of cross-laminated timber are analyzed for case of static loading. Two panels with thickness 95mm consisting from three layers were tested in laboratory. Freely supported panels with span equal to 2m, which is loaded by the uniformly distributed load was a design scheme of considered panels. The panel’s width was equal to 1m. Analytical FEM design method, which is based on the using of computational program ANSYSv14 and RFEM5.0, was checked by the experiment. The comparison of stresses acting in the edge fibers and vertical displacements shows that the considered design methodology can be used for engineering calculations. The result difference changes in limits to 30%.
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Design Methods for Load-Bearing Elements from Cross Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue1116
Year of Publication
2015
Topic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Author
Vilguts, Aivars
Serdjuks, Dmitrijs
Goremikins, Vadims
Publisher
IOP Publishing Ltd
Year of Publication
2015
Format
Report
Material
CLT (Cross-Laminated Timber)
Topic
Design and Systems
Keywords
FEM
Bending
Compression
Static Load
Pine
Uniformly Distributed Load
Strength
Stiffness
Conference
International Conference on Innovative Materials, Structures and Technologies
Research Status
Complete
Notes
September 30-October 2 2015, Riga, Latvia
Summary
Cross-laminated timber is an environmentally friendly material, which possesses a decreased level of anisotropy in comparison with the solid and glued timber. Cross-laminated timber could be used for load-bearing walls and slabs of multi-storey timber buildings as well as decking structures of pedestrian and road bridges. Design methods of cross-laminated timber elements subjected to bending and compression with bending were considered. The presented methods were experimentally validated and verified by FEM. Two cross-laminated timber slabs were tested at the action of static load. Pine wood was chosen as a board's material. Freely supported beam with the span equal to 1.9 m, which was loaded by the uniformly distributed load, was a design scheme of the considered plates. The width of the plates was equal to 1 m. The considered cross-laminated timber plates were analysed by FEM method. The comparison of stresses acting in the edge fibres of the plate and the maximum vertical displacements shows that both considered methods can be used for engineering calculations. The difference between the results obtained experimentally and analytically is within the limits from 2 to 31%. The difference in results obtained by effective strength and stiffness and transformed sections methods was not significant.
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Design Methods of Elements from Cross-Laminated Timber Subjected to Flexure

https://research.thinkwood.com/en/permalink/catalogue189
Year of Publication
2015
Topic
Design and Systems
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Vilguts, Aivars
Serdjuks, Dmitrijs
Pakrastins, Leonids
Publisher
ScienceDirect
Year of Publication
2015
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Design and Systems
Mechanical Properties
Keywords
Finite Element Method (FEM)
Static Loading Test
Stress
Research Status
Complete
Series
Procedia Engineering
Summary
Design methods of cross-laminated timber elements subjected to bending is considered. The methods are based on LVS EN 1995–1–1. The presented methods were checked by the experiment and analytically. Two cross-laminated timber plates with the total thickness of 95 mm were tested under action of static load. The considered cross-laminated timber plates were analysed by FEM method, which is based on the using of computational program ANSYSv14. The comparison of stresses acting in the edge fibres of the plate and the maximum vertical displacements shows that the considered methods can be used for engineering calculations so as the difference between the experimentally and analytically obtained results does not exceed 20%.
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Experimental Verification of Design Procedure for Elements from Cross-Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue1353
Year of Publication
2017
Topic
Mechanical Properties
Design and Systems
Material
CLT (Cross-Laminated Timber)
Author
Buka-Vaivade, Karina
Serdjuks, Dmitrijs
Goremikins, Vadims
Vilguts, Aivars
Pakrastins, Leonids
Publisher
ScienceDirect
Year of Publication
2017
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Design and Systems
Keywords
Finite Element Model
Static Load
Transformed Section Method
Research Status
Complete
Series
Procedia Engineering
Summary
Cross-laminated timber is widely used for load-bearing walls and panels of multi-storey timber buildings as well as for decking structure of pedestrian and road bridges. Design procedure for elements from cross-laminated timber was considered and validated by the experiment and FEM. The design procedure is based on the transformed section method. Eight cross-laminated timber panels with span equal to 1.8 m were experimentally checked under the action of static load. The difference between the experimentally and analytically obtained results is within the limits from 3.3 up to 20%.
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Moment-resisting beam-to-column timber connections with inclined threaded rods: Structural concept and analysis by use of the component method

https://research.thinkwood.com/en/permalink/catalogue3132
Year of Publication
2022
Topic
Connections
Author
Stamatopoulos, Haris
Malo, Kjell Arne
Vilguts, Aivars
Organization
Norwegian University of Science and Technology
Publisher
Elsevier
Year of Publication
2022
Format
Journal Article
Topic
Connections
Keywords
Moment-resisting Connection
Threaded Rod
Rotational Stiffness
Research Status
Complete
Series
Construction and Building Materials
Summary
The use of moment-resisting frames with semi-rigid connections as a lateral load-carrying system in timber buildings can reduce the need for bracing with diagonal members or walls and allow for more open and flexible architecture. The overall performance of moment-resisting frames depends largely on the properties of their connections. Screwed-in threaded rods with wood screw thread feature high axial stiffness and capacity and they may be used as fasteners in beam-to-column, moment-resisting timber connections. In the present paper, a structural concept for a beam–to-column, moment-resisting timber connection based on threaded rods is presented and explained. Analytical expressions for the estimation of the rotational stiffness and the forces in the rods were derived based on a component-method approach. The analytical predictions for stiffness were compared to experimental results from full scale tests and the agreement was good.
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Moment Resisting Frames and Connections Using Threaded Rods in Beam-to-Column Timber Joints

https://research.thinkwood.com/en/permalink/catalogue2001
Year of Publication
2018
Topic
Design and Systems
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Frames
Wood Building Systems

Parametric analyses and feasibility study of moment-resisting timber frames under service load

https://research.thinkwood.com/en/permalink/catalogue3023
Year of Publication
2021
Topic
Mechanical Properties
Application
Frames
Author
Vilguts, Aivars
Stamatopoulos, Haris
Malo, Kjell Arne
Organization
Norwegian University of Science and Technology
Publisher
Elsevier
Year of Publication
2021
Format
Journal Article
Application
Frames
Topic
Mechanical Properties
Keywords
Moment-resisting Timber Frame
Serviceability
Acceleration
Lateral Displacement
Inter-Story Drift
Fundamental Eigen-frequency
Mode Shape
Research Status
Complete
Series
Engineering Structures
Summary
Over the last decades, the increasing urbanization and environmental challenges have created a demand for mid-rise and high-rise timber buildings in modern cities. The major challenge for mid-rise and high-rise timber buildings typically is the fulfillment of the serviceability requirements, especially limitation with respect to the wind-induced displacements and accelerations. The purpose of the present paper is to evaluate the feasibility and the limitations of moment-resisting timber frames under service load according to the present regulations. The parametric analyses investigate the effects of the rotational stiffness of beam-to-column and column-to-foundation connections, storey number and height, number and length of bays, column cross-section dimensions and spacing between frames on the overall serviceability performance of the frames. Elastic and modal analysis were carried out for a total of 17,800 planar moment-resisting timber frames with different parameters by use of Abaqus Finite Element (abbr. FE) software. Finally, the obtained results were used to derive simple expressions for the lateral displacement, maximum inter-story drift, fundamental eigen-frequency, mode shapes and acceleration.
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A study on beam-to-column moment-resisting timber connections under service load, comparing full-scale connection testing and mock-up frame assembly

https://research.thinkwood.com/en/permalink/catalogue3116
Year of Publication
2022
Topic
Connections
Application
Frames
Author
Vilguts, Aivars
Nesheim, Sveinung Ørjan
Stamatopoulos, Haris
Malo, Kjell Arne
Organization
Norwegian University of Science and Technology
Publisher
Springer
Year of Publication
2022
Format
Journal Article
Application
Frames
Topic
Connections
Keywords
Moment-resisting Connection
Semi-rigid Connection
Screwed-in Threaded Rods
Experimental Modal Analysis
Research Status
Complete
Series
European Journal of Wood and Wood Products
Summary
A new timber frame structural system consisting of continuous columns, prefabricated hollow box timber decks and beam-to-column moment-resisting connections is investigated. The hollow box timber decks allow long spans with competitive floor height and efficient material consumption. To achieve long spans, semi-rigid connections at the corners of deck elements are used to join the columns to the deck elements. In the present paper, experimental investigations of a semi-rigid moment-resisting connection and a mock-up frame assembly are presented. The semi-rigid connection consists of inclined screwed-in threaded rods and steel coupling parts, connected with friction bolts. Full-scale moment-resisting timber connections were tested under monotonic and cyclic loading to quantify rotational stiffness, energy dissipation and moment resistance. The mock-up frame assembly was tested under cyclic lateral loading and with experimental modal analysis. The lateral stiffness, energy dissipation, rotational stiffness of the connections and the eigen frequencies of the mock-up frame assembly were quantified based on the experimental tests in combination with a Finite Element model, i.e., the model was validated with experimental results from the rotational stiffness tests of the beam-to-column connections. Finally, the structural damping measured with experimental modal analysis was evaluated and compared with FE model using the material damping of timber parts and equivalent viscous damping of the moment-resisting connections.
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8 records – page 1 of 1.