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Experimental Assessment of Alternative Shear Connections in Cross-Laminated Timber-Concrete Floor Systems
| 题名： | Experimental Assessment of Alternative Shear Connections in Cross-Laminated Timber-Concrete Floor Systems |
| 正文语种： | eng |
| 作者： | Ian Morrell;Christopher Higgins;Arijit Sinha;Andre R. Barbosa |
| 作者单位： | Oregon State Univ.;Oregon State Univ.;Oregon State Univ.;Oregon State Univ. |
| 关键词： | Mass timber;Shear connectors;Timber-concrete composite (TCC) floors |
| 摘要： | 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. |
| 出版年： | 2023 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 149 |
| 期： | 5 |
| 页码： | 04023046.1-04023046.15 |
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