Development of Testing Facilities and Procedures for Seismic Performance of Suspended Ceilings
Bibliographic record
Abstract
This study presents the initiation of Phase II of an international joint collaborative research project that is being carried out by researchers in Japan, China and Canada on the seismic performance of suspended non-structural components in supertall buildings.Research infrastructure was developed in this study for testing and evaluation of seismic performance of non-structural components.In addition to the development of the new research infrastructure, the development of a research program on testing of suspended ceiling systems by using the new research facilities was also included in this research.Suspended ceilings are often found in commercial buildings as part of the building contents.They are classified as non-structural components, which are also referred to as operational and functional components in a building because they provide important services or functions to the occupants of the facilities.Non-structural components typically are not designed as part of the primary seismic force resisting system; however, these components have an impact on the safety and seismic performance of the building because of their vulnerability and their contribution to the mass, stiffness, and interaction with the main structural system during earthquakes.Traditionally, the design of non-structural components, including suspended ceilings, does not consider seismic loads and the interaction effects with the supporting structure.The damage and disruption caused by failure of non-structural components can potentially represent a significant portion of the total economic loss in an earthquake.The performance of suspended ceilings, e.g., in hospitals and schools designated as post-disaster shelters, can be critical to emergency response, and recovery during and immediately after major earthquakes.In this study, previous experimental and numerical analysis research on the seismic performance of suspended ceilings are reviewed.This study also investigates the variation in design codes between the National Building Code of Canada and the International Building Code.Finally, the current seismic testing procedure is evaluated with simulated floor response records.The aim of the study is to initiate Phase II of the ILEE Project by creating the research infrastructure required for the seismic testing of non-structural components along with analytically investigating suspended ceilings to gain insights on their seismic performance.
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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 | 0.003 | 0.004 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.005 | 0.002 |
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".