Information for Strong-Motion Station
Corona - 2-story Office Bldg
CGS - CSMIP Station 13698
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 33.8562 N
Longitude 117.5412 W
Elevation (m) 241
Site Geology Alluvium
Vs30 (m/sec) - -
Site Class D
Remarks Site information sources
No. of Stories above/below ground2/0
Plan ShapeRectangular
Base Dimensions190' x 308'
Typical Floor Dimensions190' x 308'
Design Date1991
Instrumentation1994. 15 accelerometers, on 4 levels in the building. 3 accelerometers at a reference free-field site.
Vertical Load Carrying SystemConcrete slabs over metal decks on 1st, 2nd floor, and roof (9",6" & 4" overall thickness respectively) supported by steel beams (steel trusses at roof level) and steel columns on elastomeric bearings.
Lateral Force Resisting SystemSteel braced frames (chevron) and steel moment resisting frames at the perimeter. All columns are supported by laminated steel and rubber isolators. Perimeter isolators have 7.5" diam. lead core. 18" clearance is around the perimeter to allow building seismic movement.
Foundation Type24" diam. Drilled cast-in-place concrete piles. 49 four-pile groups (28' long, 150 kips capacity per pile) and 5 five-pile groups (37' long, 250 kips capacity per pile).
RemarksThe structure has been designed in compliance with the Uniform Building Edition. The seismic design was performed by dynamic analysis with base isolation system (seismic zone 4). Viscous dampers were added after the 1994 Northridge Earthquake.