CESMD |
Information for Strong-Motion Station |
Benicia - Martinez/I680 West Bridge |
CGS - CSMIP Station 68682 |
Earthquakes recorded by this station |
Ambient Records for CE68682 |
Latitude | 38.0414 N |
Longitude | 122.1238 W |
Elevation (m) | -- |
Site Geology | |
Vs30 (m/sec) | |
Site Class |
No. of Spans | 10 bridge spans, 8 approach spans. |
Plan Shape | Straight with one curved approach. |
Total Length | 6215' (1894.3m). Bridge spans range from 330' (100.6m) to 528' (160.9m). Length of approach spans ranges from 90' (27.4m) to 197' (60.0m). |
Width of Deck | 77.5' (23.6m) |
Construction Date | 1962 |
Instrumentation | 2001. 71 accelerometers and 1 displacement sensor on the bridge. 3 accelerometers at a free-field site. |
Superstructure Type | Main span: steel truss. Approach spans: steel plate girders. Cantilever abutments at the approach spans. |
Substructure Type | RC hollow shaft piers supported by box footings. One column per pier. |
Foundation Type | Box footings on steel caissons. |
Remarks | This toll bridge was instrumented with 9 sensors in 1994 under the interagency agreement between Caltrans and DOC. The bridge was extensively instrumented with 81 sensors during the retrofit work in 2001. |