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491
SHAKING TABLE TEST
Seismic Wave
The seismograph data has been recorded by seismograph observatory for constant. These
seismic records on the building floor obtained through the observations are dealt. Based on
these records, the seismic waves were made artificially to have duration of 40 seconds and to
have a floor acceleration response spectrum of medium-rise and low-rise buildings. The phase
characteristic of the wave is provided by random value.
The seismic waves are applied simultaneously in two horizontal directions and the vertical
direction. As an example, the seismic wave-form applied in the shaking table test is shown in
Fig. 3, and the floor acceleration response spectra for the horizontal wave and the vertical wave
are shown in Fig. 4 (in the case of the floor acceleration of 6 m/s 2 ).
-120-80-40 0 40 80 120
Shear Strain (%)
-120-80-40 0 40 80 120
Shear Strain (%)
Fig. 2.
RESTORING FORCE CHARACTERISTIC RELATIONSHIP OF HIGH-DAMPING
RUBBER (HORIZONTAL)
TABLE. 2.
CHARACTERISTIC OF LOW-STIFFNESS AND HIGH-DAMPING RUBBER
Type of Rubber
Type A
Type B
Size
Equivalent Damping factor (%)
Equivalent shear stiffness (N/cm)
Diameter (mm)
Height (mm)
Shear strain=20%
Shear strain=40%
Shear strain=70%
Shear strain=20%
Shear strain=40%
Shear strain=70%
18
24
26
1021
590
429
74
42
8
17
21
1000
620
452