CESMD |
Information for Strong-Motion Station |
Colton - 3-bldg Hospital Complex |
CGS - CSMIP Station 23788 |
Earthquakes recorded by this station |
Latitude | 34.0742 N |
Longitude | 117.3509 W |
Elevation (m) | 325 |
Site Geology | Deep alluvium |
Vs30 (m/sec) | 329 (inferred) |
Site Class | D |
Remarks/Notes | Site information sources |
No. of Stories above/below ground | 6/0 (a), 4/0 (b), 2/0 (c) |
Plan Shape | Semi-Circular (a). Rectangular (b,c) |
Base Dimensions | 490' (diameter) (a); 420' x 150' (b); 152' x 114' (c) |
Typical Floor Dimensions | Semi-Circular (a), Rectangular (b,c). 464' (diameter) (a); 420' x 150' (b); 152' x 114' (c) |
Design Date | 1994 |
Instrumentation | 1998. 14 accelerometers and 2 relative displacement sensors on 4 levels in the building (a). 8 accelerometers, on 3 levels in the building (b). 3 accelerometers, on 1 level in the building (c). 3 accelerometers at a reference free-field station. |
Vertical Load Carrying System | Concrete slabs over metal decks supported by steel frames on high damping rubber bearings. |
Lateral Force Resisting System | Concentrially-braced steel frames isolated by high damping rubber bearings and viscous damping devices. (Five buildings are isolated by a total of 392 rubber bearings and 184 dampers.) |
Foundation Type | Concrete spread footings under columns, tied with grade beams. |
Remarks | There are five buildings at the Medical Center, three are instrumented. The funding for instrumentation was provided by the hospital owner as required by OSHPD. CSMIP provided assistance in instrumentation. |