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Experimental Assessment of Alternative Shear Connections in Cross-Laminated Timber-Concrete Floor Systems.
- Source :
- Journal of Structural Engineering; May2023, Vol. 149 Issue 5, p1-15, 15p
- Publication Year :
- 2023
-
Abstract
- New building code changes enable mass timber panels (MTP), including cross-laminated timber (CLT), to be used in moderate and tall buildings as a floor system, usually with a concrete topping. A floor system of CLT composite with a reinforced concrete topping slab can provide increased stiffness and strength, making the system more advantageous. Present connection methods used to produce composite action within timber-concrete composites (TCC) have limitations when considering constructability or performance. This study presents experimental results from four (4) shear connectors for CLT-concrete composite floor systems, including three developed for this study. The connectors included self-tapping screws (STS) at 45-degrees, a modified lag screw with an integral plate washer that bears on the CLT surface at installation, a steel angle anchored only at the end of the span, and an inverted-T steel section with stem perforations. Different tests were performed on the different connectors including individual fastener tests, push-off group tests, and full-scale one-way bending tests. The push-off group tests showed that the proposed washer-screw exhibited higher stiffness and strength than a conventional STS. The full-scale one-way bending testing showed that the STS specimen exhibited the lowest strength of the alternatives. The inverted-T section exhibited the highest stiffness, while the other three connections had similar stiffness to the STS. [ABSTRACT FROM AUTHOR]
- Subjects :
- CONCRETE slabs
SCREWS
BEND testing
IRON & steel plates
Subjects
Details
- Language :
- English
- ISSN :
- 07339445
- Volume :
- 149
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Journal of Structural Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 162430326
- Full Text :
- https://doi.org/10.1061/JSENDH.STENG-11443