1. The 5th Tongji-UBC Symposium on Earthquake Engineering
“Facing Earthquake Challenges Together” May , Tongji University Shanghai, China
Shear Connections with Self-Tapping-Screws for Cross-Laminated-Timber Panels
AFRIN HOSSAIN
[Dr. Thomas Tannert]
PhD/Student (Wood Science)| The University of British Columbia, Canada ( Present)
M.A.Sc. (Structural Engineering)| The University of British Columbia, Okanagan, Canada (2013)
B.Sc. (Civil Engineering)| Bangladesh University of Engineering and Technology, Bangladesh, (2009)
04th May 2015, Shanghai, China

2. UBC Campus
Shear Connections with Self-Tapping-Screws for Cross-Laminated-Timber Panels

3. Center for Advanced Wood Processing
Shear Connections with Self-Tapping-Screws for Cross-Laminated-Timber Panels

4. Cross-Laminated-Timber (CLT)
Improved dimensional stability, higher in plane and out of plane strength and stiffness
CLT manufacturer in Canada: Structurlam Wood Products, Nordic
FPInnovations Handbook in CA and US version
Over 50 CLT buildings have built across Canada
Shear Connections with Self-Tapping-Screws for Cross-Laminated-Timber Panels

5. Self-Tapping-Screw (STS)
Ease of installation without requiring predrilling
Choice of connector for many timber engineering applications, but the Canadian Timber Design standard has no guidance for STS
Shear Connections with Self-Tapping-Screws for Cross-Laminated-Timber Panels

6. Objectives
To investigate the performance of STS shear connections between CLT panels in terms of i) Capacity (Fmax); ii) Yield strength (Fy); iii) Stiffness; iv) Ductility (µ)
Shear Connections with Self-Tapping-Screws for Cross-Laminated-Timber Panels

7. CLT Panel-Panel Connection
Two connection systems
60 Tests with 3 Panels
69 tests with 2 panels
Shear Connections with Self-Tapping-Screws for Cross-Laminated-Timber Panels

8. Surface Spline Joint with STS in Shear
Shear Connections with Self-Tapping-Screws for Cross-Laminated-Timber Panels

9. Lap Joint with STS in Shear
Shear Connections with Self-Tapping-Screws for Cross-Laminated-Timber Panels

10. Lap Joint with STS in Withdrawal
45ᵒ
Shear Connections with Self-Tapping-Screws for Cross-Laminated-Timber Panels

11. Butt Joint with STS in Withdrawal
Shear Connections with Self-Tapping-Screws for Cross-Laminated-Timber Panels

12. Exemplary results
Shear Connections with Self-Tapping-Screws (STS) for Cross-Laminated-Timber Panels

13. Thank You!