Skip header and navigation

2 records – page 1 of 1.

Experimental and Numerical Analysis of Flexible Polymer Connections for CLT Buildings

https://research.thinkwood.com/en/permalink/catalogue2057
Year of Publication
2018
Topic
Connections
Mechanical Properties
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Azinovic, Boris
Kramar, Miha
Pazlar, Tomaž
Gams, Matija
Kwiecien, Arkadiusz
Weckendorf, Jan
Sustersic, Iztok
Organization
Cracow University of Technology
Year of Publication
2018
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Connections
Mechanical Properties
Seismic
Keywords
Pull-Pull Tests
Cyclic Loading
Energy Dissipation
Glued-In Rods
Conference
World Conference on Timber Engineering
Research Status
Complete
Summary
This paper explores the possibility of using flexible adhesives to dissipate energy in CLT buildings during earthquakes. In the first series of tests, a rod glued in a CLT panel with flexible adhesive was investigated. The connection was tested in pull-pull configuration using cyclic, tension-only loading. Different rod diameters and different thicknesses of the glue layer were tested. The tests have shown that the adhesive can resist large deformations and exhibits fairly large energy dissipation capacity. Based on the test results the numerical analyses were performed to test the behaviour of the connection when applied in CLT buildings. Existing constitutive models available in OpenSees software were used to simulate the specific hysteretic behaviour of the connection. The results have shown that the CLT wall anchored with "flexible" glued-in rods would have a significant energy dissipation capacity if a sufficient number of them were used as the hold-down devices. Such system could be used to dissipate energy in seismic areas.
Online Access
Free
Resource Link
Less detail

Mechanical performance of timber connections made of thick flexible polyurethane adhesives

https://research.thinkwood.com/en/permalink/catalogue3130
Year of Publication
2021
Topic
Connections
Author
Pecnik, Jaka Gašper
Gavric, Igor
Sebera, Václav
Kržan, Meta
Kwiecien, Arkadiusz
Zajac, Boguslaw
Azinovic, Boris
Organization
University of Primorska
Slovenian National Building and Civil Engineering Institute
Cracow University of Technology
Publisher
Elsevier
Year of Publication
2021
Format
Journal Article
Topic
Connections
Keywords
Flexible Adhesive
Timber Connection
Polyurethane
Double Lap-shear
Cyclic Loading
Energy Dissipation
Research Status
Complete
Series
Engineering Structures
Summary
This study investigates timber connections with flexible polyurethane adhesives, which prove to have the potential for timber-adhesive composite structures without mechanical connections for seismic regions. Results of conducted cyclic double lap-shear adhesive timber joints tests were compared with available experimental results on timber connections with standard mechanical dowel-type fasteners and with results of numerical finite element analysis. The study found that the shear strength, elastic stiffness and strength degradation capacity of the flexible adhesive connections were significantly higher compared to mechanical fasteners commonly used in seismic-resistant timber connections. The latter, however, manifested larger ultimate displacements but also yielded at lower displacements.
Online Access
Free
Resource Link
Less detail