Structural Behavior of Novel Precast TL-5 Bridge Barriers Using Ultrahigh-Performance Fiber-Reinforced Concretes
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Bibliographic record
Abstract
Experimental testing and numerical modeling were performed on novel precast TL-5 barriers subjected to centered and eccentric loadings in a quasi-static mode. The mechanical behavior of two precast barrier configurations was analyzed and compared: a hybrid barrier including a normal strength concrete (NSC) core and a ultrahigh performance fiber reinforced concrete (UHPFRC) shell with a UHPFRC barrier–slab connection, and a precast version of a cast-in-place QMT301 barrier made of NSC with a UHPFRC barrier–slab connection. Laboratory experiments on 2-m precast barriers under eccentric loading applied on 0.7 m demonstrated a shear failure in the upper portion of the hybrid and QMT barriers while the UHPFRC connection recess remained elastic, as observed in the cast-in-place solution. The longitudinal connection between precast barriers increased the maximal capacity under eccentric loading at the connected end. Numerical models were carried out on 2–6 -m precast barriers, under centered and eccentric loading, with 0.7 and 2.4 m loading lengths. Models showed the critical effects of shorter barrier length (2 m), shorter loading length (0.7), and eccentric loading as these factors significantly reduce the ultimate capacity of the precast barrier. Models validated with experiments confirmed that the load-carrying capacities of the developed precast TL-5 hybrid and QMT301 barriers surpass the minimum CSA and AASHTO design load requirements when considering 4-m barrier modules loaded on 2.4 m, whether or not there is a longitudinal connection and whether the loading is centered or eccentric.
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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 | 0.001 |
| 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