Golden Gate Bridge tower base
Named in the records1990
37 records of San Francisco tie this place, 1990: 0 decisions of the Board of Supervisors and 37 facts read from city reports. Open the full list, with filters for years, kind and outcome.
- Kind
- Named in the records
- Records
- 37: 0 Board decisions, 37 facts from city reports
- Years
- 1990
What the records say
All 37 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 tower · finding: Maximum base moment from longitudinal earthquake 2,400,000 kip-ft, above the 900,000 kip-ft base moment capacity for initial rivet shear failure | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower · finding: Incremental nonlinear analyses were conducted to establish the degree of damage at the tower base under the maximum credible earthquake input | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base · finding: Rotational ductility demand at tower base about 4 under maximum credible earthquake | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base connections · recommendation: Tower base connections shall develop strength demand of the applied load in a ductile manner | recommendation | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge main bridge · other: Nonlinear local model of tower base and concrete pier connection | building | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower · other: Detailed local tower model with nonlinear filament model at base | building | 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 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 tower base rivet connection · other: shear strength of 16 double-shear rivet connection | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge stiffened tower web plate · other: buckling stress level of stiffened web plate (42 in. wide, 7/8 in. thick) | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge hold-down steel angle group · other: yield strength of hold-down steel angle for each group of four angles | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base connection · other: constraint axial load of 70,870 kip (tower weight and vertical cable load) | building | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base connection · other: initial elastic rotational stiffness Kz = 3,300,000,000 kip-ft/rad | measure | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base connection · other: initial elastic rotational stiffness Kx = 860,000,000 kip-ft/rad | measure | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base connection · finding: at base rotation of about 0.0003 rad, riveted hold-down connections sheared off and partial uplifting occurred | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base connection · finding: average filament compressive stress reached buckling level at base rotation of about 22 x 10-4 rad, ductility factor about 7 | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base connection · finding: yield moment at initial rivet shear failure Mzy = 900,000 kip-ft | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base connection · finding: yield moment at initial rivet shear failure Mxy = 300,000 kip-ft | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base shaft · other: base shaft dimension 54 ft by 33 ft | building | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower concrete pier · other: concrete pier dimension 90 ft by 134 ft | building | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base connection · finding: rotational ductility factor of the base section about 7 | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base · finding: Shear failure of riveted hold down connections first occurred at 26% of full displacement amplitude | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base · finding: Rivets would fail in shear at normal tensile stress of 2.97 ksi | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base · finding: Maximum compressive stress in cells of the base 14.6 ksi at 26% displacement | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base · finding: At 34% of displacement amplitude all rivet connections on southern side sheared off | event | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base · finding: About one third of the base section uplifted at 34% displacement | event | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base · finding: At 58% of displacement amplitude half of the base section uplifted | event | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base · finding: Maximum compressive stress in cell 23.8 ksi at 58% displacement | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base · finding: Maximum stress at base at full displacement amplitude 33 ksi in compression | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base · finding: Maximum base moment in nonlinear structure about half of linear elastic prediction | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base · other: boundary spring coefficients established from nonlinear base behavior, accounting for rivet shear failure and base plate uplift | building | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower · finding: Maximum stress at the tower base is reduced to about half of the elastic stress | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base (West Shaft) · finding: Rivet failed in shear or Base plate uplifted | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower (Baron report review) · finding: Baron incorrectly assigned infinite moment of inertia to the 32 ft high base section of the tower | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower (Baron report review) · finding: Baron's analysis assumes absolute fixity at tower bottom, giving a base moment of 3,916,650 ft. kip | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
| 1990 | Golden Gate Bridge tower base connection · finding: complete fixity at tower base is unrealistic because embedded angle connection has less moment capacity than assumed | finding | City report: Golden Gate Bridge seismic evaluation scanned page ↗ |
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