ARCHIVED REPORTS_2012_5 - Laserfiche WebLink

Home Browse Search

CALCULATION OF WEIGHTED AVERAGE 2008 NGA MODELS: by Linda At Atik,PEER-Sep,2009-LaVk@berkeley.edu Fault Name: San Gregorio Fault Zone This Excel File calculates the weighted average of the natural logarithm of the spectral values from the NGA models ' NGA Weight:Mode]: AS08 BA08 CB08 CY08 108 AS08:Abrahamson 6 Silva 2008 NGA Model BA08:Boore&Atkinson 2008 NGA Model N CBOB:Campbell&Bozorgnia 2008 NGA Model CY08:Chtou&Youngs 2008 NGA Model ' 108:Idriss 2008 NGA Model Explanatory Variables Geometric Mean Horizontal Component GMP T(s) SA Median SA Median+No SA Median-No SO Median 5%-Damped Pseudo-Absolute Acceleration Response Spectrum PSA(g) 0.010 4.706E-02 7.952E-02 2.785E-02 1.168E-04 10 SD(cm) 0.020 4.761E-02 8.060E-02 2.812E-02 4.728E-04 RRUP(j.: 0.030 4.964E-02 8.526E-02 2.890E-02 1.109E-03 90.00 0.050 5.668E-02 1.000E-01 3.211E-02 3.518E-03 0.075 6.683E-02 1.209E-01 3.695E-02 9.332E-03 t R,re(k-) 0.10 7.581E-02 1.381E-01 4.162E-02 1.882E-02 90.00 0.15 8.970E-02 1.633E-01 4.926E-02 5.010E-02 0.20 1.000E-01 1.803E-01 5.550E-02 9.933E-02 SO ' Rx(km) 0.25 9.759E-02 1.753E-01 5435E-02 1.514E-01 u o.t 0.00 0.30 9.460E-02 1.698E-01 5.270E-02 2.113E 01 u 0.40 8.363E-02 1.498E-01 4669E-02 3.321E-01 U 0.50 7.705E-02 1.390E-01 4.271E-02 4.782E-01 0 0.75 5.849E-02 1.078E-01 3.173E-02 8.167E-01 ry y 0.01 1.0 4.580E-02 8.537E-02 2.458E-02 1.137E+00 Fav 1.5 3.046E-02 5.759E-02 1.611E-02 1.701E+00 0 2.0 2.275E-02 4.328E-02 1.196E-02 2.259E+00 3.0 1.469E-02 2.804E-02 7.700E-03 3.283E+00 Fx 4.0 1.098E-02 2.100E-02 5.745E-03 4.363E+00 o.00t n o.m 8.7 t 70 0 5.0 9.029E-03 1.818E-02 4.483E-03 5.603E+00 Period(s) 7.5 5.526E-03 1.182E-02 2.584E-03 7.716E+00 FN. 10.0 3.902E-03 8.901E-03 1.710E-03 9.686E+00 0 roa(km) PGA(g) 0 0.047 7.952E-02 2.785E-02 0.60 PGV(Gs) -1 5.903E+00 9.977E+00 3.492E+00 6 90 pto(Msec) ' 760 Fsr•0 c„e Z (m) DEFAULT DEFINITION OF PARAMETERS: Zi s(km) N =Number of standard deviations to be considered in the calculations DEFAULT PSA =Pseudo-absolute acceleration response spectrum(g;5%damping) PGA -Peak ground acceleration(g) W(km) PGV =Peak ground velocity(cm/s) 1 SO =Relative displacement response spectrum(cm;5%damping) E=Moment magnitude FAS =Closest distance to coseismic rupture(km),used in AS08,CB08 and CY08.See Figures a,b and c for illustation 0 =Closest distance to surface projection of coseismic rupture(km).See Figures a,b and c for illustation Rx -Horizontal distance from top of rupture measured perpendicular to fault strike(km),used in AS08 and CY08.See Figures a,b and c for illustation HW Taper U =Unspecified-mechanism factor:i for unspecified;0 otherwise,used in BA08 0 =Reverse-faulting factor:0 for strike slip,normal,normal-oblique;1 for reverse,reverse-oblique and thrust e =Normal-faulfing factor:0 for strike slip,reverse,reverse-oblique,thrust and normal-oblique;1 for normal Film. Hanging-wall factor:1 for site on down-dip side oftop of rupture;0 otherwise,used in AS08 and CY08 Zroe =Depth to top of coselsmic rupture(km),used in AS08,CBOS and CYO8 - - =Averege dip of rupture plane(degrees),used in ASO8,CB08 and CY08 =Average shear-wave velocity in top 30m of site profile Fla, _,-Vs30 Factor:1 if VS30 is measured,0 if Vs30 is inferred,used in AS08 and CY08 Z r.o -Depth to 1.0 km/sec velocity horizon(m),used in AS08 and CY08.Enter"DEFAULT"in order to use the default values or enter your site specific number _=Depth of 2.5 km/s shear-wave velocity horizon(km),used in CB08.Enter"DEFAULT"in order to use the default value or enter your site specific number W =Fault rupture width(km),used in AS08 FAS =Aftershock factor:0 for mainshock;1 for aftershock,used in AS08 and CY08 HW Taper=To choose the hanging wall taper to be used in ASOB.Enter 0 to use the hanging wall taper as published in Abrahamson and Silva(2008), or enter 1 to use the revised hanging wall taper suggested by Norm Abrahamson