Experimental test on a slender masonry wall with an alternative reinforcement configuration
Bibliographic record
Abstract
As modern construction demands drive the use of taller and thinner masonry walls, challenges of second-order (P-delta) effects and design inefficiencies become increasingly significant. This study evaluates an alternative vertical reinforcement configuration for partially grouted slender masonry walls, addressing the ineffective placement of reinforcing bars associated with current practice. The proposed arrangement includes larger reinforcement area and relocates vertical reinforcement to the edges of grouted cells (touching the inner face of blocks), increasing the wall’s stiffness. A full-scale 8.75 m tall ( kh / t = 46 ) masonry wall with the proposed reinforcement arrangement ( A s = 1600 mm 2 , bars at the edges of cells) was tested in a specialized setup. Regular length lap splices (700 mm) were used in the wall’s construction. The wall was subject to combined vertical and out-of-plane loads under varying boundary conditions. Results showed up to a threefold increase in out-of-plane load capacity compared to typically reinforced walls ( A s = 400 mm 2 , bars at the centre) with large reductions in lateral deflections. Failure was attributed to bond-related mechanisms at the vertical lap splice, highlighting the need for longer splice lengths than those provided in the specimen when bars have little cover. However, bars almost yielded at failure (reaching up to 97 % of their yield strain), showing partial development and suggesting that the splice length required by the Canadian masonry design standard (⁓2640 mm for S304–14 or ⁓530 mm for the recent S304:24) may not be adequate for this configuration. The proposed reinforcement arrangement offers a practical means to enhance the stiffness and strength of slender masonry walls, provided revised splice lengths are used.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 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 | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".