Table 3: Amplification factors between PRA at the roof and PGA at the building base.

SensorsDirectionAmplification factor

Building A

PRA 3 versus PGA 6X3.370.80
Y4.200.96
PRA 3 versus PGA 7X3.310.79
Y4.260.96
PRA 4 versus PGA 6X3.210.85
Y4.390.95
PRA 4 versus PGA 7X3.160.85
Y4.440.95

Building B

PRA 1 versus PGA 8X3.290.93
Y3.510.94
PRA 1 versus PGA 9X3.220.91
Y3.270.90
PRA 2 versus PGA 8X3.870.90
Y3.520.97
PRA 2 versus PGA 9X3.780.88
Y3.270.97