Post-fire structural performance of glued-laminated timber columns subjected to real fires
Why this work is in the frame
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Bibliographic record
Abstract
This paper presents the results of an experimental test program conducted on fire-damaged glued-laminated timber (glulam) columns. The columns were part of the Mass Timber Demonstration Fire Test Program (MTDFTP) in Ottawa, Canada, during which a series of full-scale fire tests were performed on a two-storey mass timber structure. The structure was designed to represent the fourth and fifth storey of a hypothetical 12-storey mass timber building. The specimens were subjected to qualitative and quantitative post-fire structural assessments following the fire tests. The charred layer of each column specimen was removed by physical means and the residual cross-sections were measured and evaluated to determine the char depth. Full-scale axial compression tests were conducted to verify the post-fire structural demand of the columns. The findings indicated that the charring rates consistently exceed those prescribed in contemporary design standards. The column specimens were capable of withstanding expected post-fire axial loads, secondary effects caused by the fire damage need to be considered when predicting post-fire axial capacities. The research outcomes of this study are expected to support Canadian design and fire code provisions as they pertain to the use of mass timber in mid-rise structures, particularly in terms of conducting post-fire structural assessments.
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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