Response of multistory friction pendulum base-isolated buildings including the vertical component of earthquakes
Bibliographic record
Abstract
The current investigation examines effects of the vertical component of earthquake on the base-isolated structures response using friction pendulum system. The structure has been idealized as a 4-story shear type building resting on a friction pendulum system, and the coupled differential motion equations of isolated system are derived and solved in incremental form, using Newmark β-method. Based on the extracted equations, a computer program was developed, which simulates the response of multistory friction pendulum base-isolated buildings with the inclusion of the vertical component of earthquake. Under five near fault earthquakes, effects of vertical ground motion on the multistory friction pendulum base-isolated buildings by varying the main system parameters were studied. These parameters included isolation period, superstructure period, friction coefficient of sliding surface, base to story mass ratio and superstructure damping ratio. The study was carried out with the help of the aforementioned software. In contrary to the previous studies, the current research investigated the effects of the vertical earthquake component on the multistory isolated building responses including the floor acceleration and base shear simultaneously. It was confirmed that the pattern and rate of these effects are quite different. Additionally, it is demonstrated that the maximum error due to neglecting the vertical component of earthquake on the peak values of the bearing displacement, base shear and floor acceleration are, respectively, 15.61%, 36%, and 50.12%; which proves that the vertical component of earthquake should be treated more seriously in the practical designs.
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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 | 0.000 | 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 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".