CONSIDERING THE GROUND MOTION SPECTRAL SHAPE THROUGH A COLLAPSE ADJUSTMENT METHOD IN WESTERN CANADA
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Bibliographic record
Abstract
One of the most significant properties of ground motions that is highly correlated with the nonlinear response of structures is the spectral shape. One common approach to account for the spectral shape effect is to adjust the collapse intensity of structures by establishing a relationship between the collapse intensity and a direct or indirect indicator of the spectral shape. The majority of the studies conducted on collapse adjustment procedures have focused on building structures located in the Western United States and designed according to the relevant building codes. Application of these procedures to Canada, which has diverse seismic events (ranging from the crustal earthquakes of the stable North American continental region in the East to the active crustal and Cascadia subduction events in the West), requires further investigation. In this study, a number of multi-story reinforced concrete buildings with various fundamental periods and ductility capacities in Western Canada are designed according to the relevant Canadian standards and modeled with the OpenSees software. Using the incremental dynamic analysis, the relationship between the collapse intensity of the structures and the spectral shape of different types of ground motions is investigated and compared with those available in the literature for regions with similar seismic hazard properties. According to the results, due to the inherent differences between the spectral shape of crustal and subduction ground motions within both the short- and long-period ranges of the response spectrum and the remarkably longer duration of the interface records, it is necessary to use event-specific collapse adjustment approaches for seismic assessment of building structures in Western Canada. The effect of using different spectral shape indicators on the collapse assessment results obtained from a recently developed unified seismic performance-based assessment procedure is also investigated. It is expected that the results of this study will help to better understand the necessity of accounting for the spectral shape effect in Canada and determine the application range of existing collapse adjustment methods to building structures with different ductility capacities and configurations.
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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 | 0.001 |
| 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