Golden Gate Bridge main tower
Named in the records1990
24 records of San Francisco tie this place, 1990: 0 decisions of the Board of Supervisors and 24 facts read from city reports. Open the full list, with filters for years, kind and outcome.
- Kind
- Named in the records
- Records
- 24: 0 Board decisions, 24 facts from city reports
- Years
- 1990
What the records say
All 24 records, in date order. The one-line summaries were written by a language model from the printed page; open the page to check the wording.
| When | What the record says | Outcome | Source |
|---|---|---|---|
| 1990 | Golden Gate Bridge · finding: Maximum additional cable force induced by vertical earthquake excitation near the main tower: 10,539 kip | building | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower base · finding: rotational ductility demand about 2.2 at upper level earthquake (475-year return period) | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower shaft · finding: local buckling and tensile yielding in web plate under maximum credible earthquake | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · finding: stress conditions in parts of the main tower exceed yield or buckling limits (Baron study) | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower end-restraint · finding: tower end-restraint assumed by Baron cannot possibly be attained | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower shaft · other: 96 hold-down steel angles riveted to tower shaft web plates | building | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower shaft · other: 78 steel dowels providing positive shear connection | building | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower base connection · other: 96 hold down steel angles riveted to the web plates of the tower shaft | building | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower base connection · other: 78 steel dowels providing positive shear connection | building | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower shaft · other: hold-down angles pre-stretched to 105 kip before riveting | building | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · finding: Computed and measured tower periods correlate very closely, validating the computer model | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower model · finding: computed and measured tower periods closely correlate, validating the computer model | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · other: Modal damping ratio 1.3% for first longitudinal tower mode (T = 1.332 sec.) | measure | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · other: Modal damping ratio 2.2% for first transverse tower mode (T = 2.1845 sec.) | measure | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · other: Modal damping ratio 1.3% for first torsional tower mode (T = 1.2136 sec.) | measure | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · other: Damping ratios up to 5% for longer period modes (T = 5 sec.) involving tower and suspended structure | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · other: Modal damping ratio of 3% expected in the period range of 1 to 2 seconds | recommendation | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · finding: Uplifting of the base plate occurred initially at the west edge of the west shaft when 52% of the displacement amplitude was imposed | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · finding: First hold-down rivet connection shear failure occurred when 78% of the displacement amplitude was imposed | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · finding: Two-thirds of the rivet connections in the west shaft failed in shear and 30 of the 42 filaments uplifted | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · finding: The maximum compressive stress in the east shaft was 20.3 ksi | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · finding: maximum compressive stress at the base of the east shaft was 17.2 ksi | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower base · finding: about half of base section under each shaft uplifted under rocking response | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main tower · finding: massive concrete pier and rock foundation have practically no effect on tower response | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
All 24 records, with filters · this place's data as JSON · release v0.7.1 · CC0 1.0