Numerical simulation of the group effect in the slip modulus of laterally loaded multiple fastener cross-laminated timber connections
Saved in:
| Title: | Numerical simulation of the group effect in the slip modulus of laterally loaded multiple fastener cross-laminated timber connections |
|---|---|
| Authors: | Gikonyo, Joan, Schweigler, Michael, Bader, Thomas K., 1980 |
| Source: | Construction and Building Materials. 484 |
| Subject Terms: | CLT dowel-type fastener shear connections, Beam-on-foundation model, Non-linear analysis, Shear capacity, Slip modulus, Parameter study, Group effect, Byggteknik, Civil engineering |
| Description: | Ductile timber structures are mainly realised using dowel-type connections, which exhibit non-linear force–displacement behaviour that is not directly proportional to the number of fasteners. This so-called group effect has mainly been studied as regards strength, while the group effect in the slip modulus is less investigated. A Beam-on-Foundation (BoF) model for the local behaviour of each fastener is integrated into a multiple fastener steel-to-cross-laminated timber (CLT) connection model, considering CLT layer specific non-linear embedment behaviour. The BoF model for each fastener is kinematically coupled to the surrounding timber matrix, modelled by shell elements with orthotropic linear-elastic material properties. The resulting adaptive connection model is used to predict both shear capacity and slip modulus of steel-to-CLT connections with multiple fasteners and to investigate group effects. A comparison of experimentally-determined and model predicted shear capacity and connection slip modulus showed good agreement. The validated model was applied to study, in addition to the number of fasteners parallel and perpendicular to the outer layer’s fibre direction, the influence of fastener diameter, fastener spacing, loading direction, timber density and steel plate thickness on the load distribution between the fasteners and the overall connection behaviour. The dataset from the parameter study was then exploited to derive a design equation that predicts the group effect in the slip modulus of CLT connections. |
| File Description: | electronic |
| Access URL: | https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-138555 https://doi.org/10.1016/j.conbuildmat.2025.141536 |
| Database: | SwePub |
Full Text Finder 
Nájsť tento článok vo Web of Science | Abstract: | Ductile timber structures are mainly realised using dowel-type connections, which exhibit non-linear force–displacement behaviour that is not directly proportional to the number of fasteners. This so-called group effect has mainly been studied as regards strength, while the group effect in the slip modulus is less investigated. A Beam-on-Foundation (BoF) model for the local behaviour of each fastener is integrated into a multiple fastener steel-to-cross-laminated timber (CLT) connection model, considering CLT layer specific non-linear embedment behaviour. The BoF model for each fastener is kinematically coupled to the surrounding timber matrix, modelled by shell elements with orthotropic linear-elastic material properties. The resulting adaptive connection model is used to predict both shear capacity and slip modulus of steel-to-CLT connections with multiple fasteners and to investigate group effects. A comparison of experimentally-determined and model predicted shear capacity and connection slip modulus showed good agreement. The validated model was applied to study, in addition to the number of fasteners parallel and perpendicular to the outer layer’s fibre direction, the influence of fastener diameter, fastener spacing, loading direction, timber density and steel plate thickness on the load distribution between the fasteners and the overall connection behaviour. The dataset from the parameter study was then exploited to derive a design equation that predicts the group effect in the slip modulus of CLT connections. |
|---|---|
| ISSN: | 09500618 18790526 |
| DOI: | 10.1016/j.conbuildmat.2025.141536 |