Vibration Performance and Stiffness Properties of Mass Timber Panel–Concrete Composite Floors with Notched Connections
Why this work is in the frame
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Bibliographic record
Abstract
Mass timber panel–concrete composite (MTPCC) floors combine timber and concrete through high-performance connections to create an efficient floor system with high stiffness, high strength, and low self-weight. Previous research on MTPCC floors focused on improving the composite efficiency of floors under static loadings by testing different types of shear connectors. The dynamic performances of MTPCC floors, which can govern the floor span and thickness, have not been well investigated. In this study, vibration tests were conducted on glued-laminated timber panels and notch-connected MTPCC floors with different spans, thicknesses, and connection layouts. The dynamic properties, including natural frequencies, damping ratios, and mode shapes, were obtained for floors under different supporting conditions. Test results showed that MTPCC floors with a 6-m span had fundamental natural frequencies generally higher than 8 Hz. The addition of the concrete layer to the bare timber panels improved the floor fundamental natural frequency and damping. Deflection tests and walking tests were performed on MTPCC floors to evaluate the floor vibration serviceability performance, and it was found that the existing design criteria predicted inconsistent results. The flexural stiffness of MTPCC floors determined from vibration and deflection tests was close to full composite, while only partial composite action in the composite floors was achieved under a higher load level in destructive bending tests.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it