Development of Self-Reinforced Concrete Block for Improved Shear Wall Ductility
Why this work is in the frame
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Bibliographic record
Abstract
This paper describes development of a new Self-Reinforced Block (SR Block) designed to achieve greatly increased compressive strains in order to enhance shear wall ductility. Design of SR Block to provide confinement of block concrete is presented. Proof-of-concept block making showed that reinforcing devices could be molded within the body of a hollow block using standard block making equipment. Prism tests using these SR Block showed equal strength to unreinforced block at 2% strain and over 80% strength at 3% strain. A spiral wire type of reinforcing device was molded into block for construction of a full scale shear wall. Tests of companion block prisms showed over 40% increase in compressive strength and over 80% retained strength at 3% strain. Fully reversed cyclic testing of the SR Block shear wall reached a ratio of ultimate deflection to yield deflection of 7.0 where ultimate deflection was defined as the point when post-yield capacity had decreased to 80% of the peak value. Using an idealized bilinear equal energy response, this ratio changed to 5.5. Compared to an identical wall utilizing standard block, the SR Block wall had superior ductility and capacity maintenance. Even so, examination of the wall after termination of loading showed that the ductility limit had not been reached but rather that resistance to lateral load had decreased due to a shear softening of the wall. A duplicate wall with improved shear resistance gave an idealized deflection ratio of 8.3. The implications for seismic design are discussed.
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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 | 0.001 | 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