Information for Strong-Motion Station
Riverside - 6-story Hospital
CGS - CSMIP Station 13633
Earthquakes recorded by this station
(Station Photograph - click to enlarge)(Sensor Layout - click to see PDF File)
Latitude 33.9761 N
Longitude 117.3812 W
Elevation (m) --
Site Geology Alluvium
Vs30 (m/sec) - -
Site Class D
Remarks/Notes Site information sources
No. of Stories above/below ground6/1
Plan ShapeIrregular
Base Dimensions380 x 210 ft
Typical Floor Dimensions280 x 50 ft
Design Date1963, 2010 (retrofit)
Instrumentation2017, 12 accelerometers on 4 levels plus 3 accelerometers at a reference free-field.
Vertical Load Carrying SystemCast-in-place concrete slab/joist system supported by concrete beams, columns and walls.
Lateral Force Resisting SystemReinforced concrete shear walls in transverse direction. Concrete frames above the Ground Floor and concrete shear walls below in the longitudinal direction. The voluntary seismic improvement was intended to mitigate the deficiencies of vertical discontinuity by adding new concrete shear walls and by strengthening selected existing concrete columns with FRP wraps.
Foundation TypeConcrete pile caps with groups of 20-inch diameter reinforced concrete piles (40 feet long) . Pile caps are interconnected with concrete grade beams.
RemarksThe voluntary seismic improvement (VSI) 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.