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Record W1509248112

LION'S GATE BRIDGE REHABILITATION PROVES A LION-SIZED CHALLENGE

2002· article· en· W1509248112 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

aboutThe title or abstract carries a Canadian signal from the geographic lexicon.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

VenueENR · 2002
Typearticle
Languageen
FieldEngineering
TopicStructural Engineering and Vibration Analysis
Canadian institutionsnot available
Fundersnot available
KeywordsBridge (graph theory)DeckEngineeringTrussStructural engineeringTruss bridgeSpring (device)Civil engineeringForensic engineeringTransport engineering
DOInot available

Abstract

fetched live from OpenAlex

Replacing the deck of the three-lane Lion's Gate Bridge, crossing the Burrard Inlet in Vancouver, BC, involved complex engineering decisions and improvisations to account for the 1938 structure's original design, which didn't allow much more capacity without new improvements. After considering building a movable truss to replace the deck in segments while reopening the bridge to traffic each morning, engineers realized it might not tolerate the load that the bridge's owner, the British Columbia government, demanded. Instead, they turned to traveling jacks. Every morning the bridge had to be restored to road-worthiness for some 45,000 daily vehicles. At night, tolerances were so slim, contractors had to count how many workers were on the structure to make sure its load-bearing capacity wasn't exceeded by all the equipment used in repairs. Seismic upgrades were also done on foundations, including movable plates to allow support beams to bend and not break. Structural repairs were completed at the end of 2000. Final paving is set to be done by spring 2002.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: Simulation or modeling
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.301
Threshold uncertainty score0.495

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.011
GPT teacher head0.201
Teacher spread0.189 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it