CESMD

Information for Strong-Motion Station

Santa Ana - 1-story Hospital

CGS - CSMIP Station 13611

Earthquakes recorded by this station

 

(Station Photograph - click to enlarge)	(Sensor Layout - click to see PDF File)

   

Latitude	33.7548 N
Longitude	117.8333 W
Elevation (m)	49
Site Geology	Deep alluvium
Vs30 (m/sec)	229 (inferred)
Site Class	D
Remarks/Notes	Site information sources

 

No. of Stories above/below ground	1/0
Plan Shape	Square
Base Dimensions	100 x 100 ft
Typical Floor Dimensions	100 x 100 ft
Design Date	1971, 2011 (Retrofit)
Instrumentation	2018, 6 accelerometers on 3 levels plus 3 accelerometers at a reference free-field.

 

Vertical Load Carrying System	Concrete over metal deck supported by steel beams and girders with precast concrete columns at the perimeter and steel columns at the interior.
Lateral Force Resisting System	Steel X-braces at the perimeter in both directions. Retrofit (2017): Addition of shear transfer plates and drag members at roof diaphragm, and strengthening of existing braced frames.
Foundation Type	Continuous concrete footings at perimeter, and concrete spread footings at interior columns. Retrofit (2017): Widening of continuous concrete footing at braced frame locations.
Remarks	The retrofit (voluntary seismic improvement) was designed in accordance with the 2010 California Building Code. Funding for instrumentation was provided by the owner as required by OSHPD. CSMIP provided assistance in instrumentation.