CESMD |
Information for Strong-Motion Station |
San Francisco - Golden Gate Bridge |
CGS - CSMIP Station 58700 |
Earthquakes recorded by this station |
Ambient Records for CE58700 |
Latitude | 37.8198 N |
Longitude | 122.4788 W |
Elevation (m) | -- |
Site Geology | |
Vs30 (m/sec) | |
Site Class |
No. of Spans | 14. (1 Main span, 2 side spans, 6 spans at the North Viaduct, 5 spans at the South Viaduct). |
Plan Shape | Mostly straight with a curve at the South Viaduct. |
Total Length | 9151' (2789.2m). Main bridge spans are 1125' (342.9m), 4200' (1280.2m), and 1125' (342.9m). North viaduct spans are approx. 200' (61.0m) with a 347' (105.8m) anchorage housing. South viaduct spans range from 71' (21.6m) to 320' (97.5m). |
Width of Deck | 87.1' (26.5m) to 90' (27.4m). |
Construction Date | 1937 (several upgrades since 1937). |
Instrumentation | 1995. 69 accelerometers and 4 relative displacement sensors on the bridge, and a free-field station on the south side of the bridge. As of 2008, 100 accelerometers and 12 relative displacement sensors on the bridge, and geotechnical arrays on the north side and south side of the bridge. |
Superstructure Type | Main span and side spans: suspended steel truss spans supported by braced steel towers. North and South Viaducts are mainly steel truss spans, with a steel arch span at the South Viaduct, supported by steel towers. |
Substructure Type | Suspension spans: braced steel cellular shaft towers. 2 columns per tower. North and South Viaducts: braced steel towers and concrete pylons. |
Foundation Type | Reinforced concrete piers support the main span towers. |
Remarks | The bridge was instrumented under the agreement between the Golden Gate Bridge, Highway and Transportation District and DOC. |