System Identification of Heritage Court Tower Using Stochastic Subspace Method, #407
Bibliographic record
Abstract
Modal parameters from a 15-story reinforced concrete shear core building were identified. The building, known as the Heritage Court Tower, is located in Vancouver, Canada. Ambient vibration measurements were performed by the University of British Columbia and the data was made freely available for comparative analysis of identification methods. In the present study a stochastic subspace system identification method was used to define the modal properties of the structure. This time-domain identification method is based on the state space model and does not use iterative search. Important parameters in the stochastic subspace method are model order and auxiliary order, which must be optimised to get the most reliable model. Different model orders were compared using the stabilisation diagram. Eleven modes below 12 Hz were found. The first seven modes below 7 Hz were found to be clearly stabilised. The first three are closely spaced between 1.23 and 1.46 Hz and correspond to the first two bending modes and the first torsional mode. Different modal parameters were extracted from each measurement set-up, but the discrepancy was not large.
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How this classification was reachedexpand
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) | 0.001 | 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 | 0.000 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".