cb_2014_nga: The GMPE of CB 2014

In wltcwpf/GMPE: A pacakge of commonly used Ground Motion Prediction Equations (GMPE)

The GMPE of CB 2014

Description

This function calculates the ground motion median values and standard deviations

Usage

cb_2014_nga(
  M,
  T = 1000,
  Rrup,
  Rjb,
  Rx,
  W = 999,
  Ztor = 999,
  Zbot,
  dip,
  lambda,
  Fhw,
  Vs30,
  Z25 = 999,
  Zhyp = 999,
  region
)

Arguments

M	Moment magnitude, a numeric value
T	Period (sec); Use Period = -1 for PGV computation. Use 1000 (by default) for output the array of Sa with original NGA West2 periods
Rrup	Closest distance (km) to the ruptured plane
Rjb	Joyner-Boore distance (km); closest distance (km) to surface projection of rupture plane
Rx	Site coordinate (km) measured perpendicular to the fault strike from the fault line with down-dip direction to be positive
W	Down-dip rupture width (km). 999 if unknown
Ztor	Depth(km) to the top of ruptured plane. 999 if unknown
Zbot	Depth(km) to the bottom of the seismogenic crust. It is needed only when W is unknown.
dip	Fault dip angle (in degree)
lambda	Rake angle (in degree)
Fhw	Falg for hanging wall sites. 1 for sites on the hanging wall side of the fault, 0 otherwise.
Vs30	Shear wave velocity averaged over top 30 m (in m/s)
Z25	Basin depth (km): depth from the groundsurface to the 2.5km/s shear-wave horizon. 999 if unknown.
Zhyp	Hypocentral depth of the earthquake measured from sea level. 999 in unknown
region	Region indicator: 0 for global (incl. Taiwan); 1 for California; 2 for Japan; 3 for China or Turkey; 4 for Italy

Value

A list of five elements is returned: med - median spectral acceleration prediction (in g); sigma - logarithmic standard deviation of spectral acceleration prediction; phi - logarithmic standard deviation of within event residuals; tau - logarithmic standard deviation of between event residuals; period - the corresponding oscillator periods

References

Campbell, K. W., and Bozorgnia, Y. (2014). NGA-West2 Ground Motion Model for the Average Horizontal Components of PGA, PGV, and 5 Acceleration Response Spectra. Earthquake Spectra, 30(3), 1087-1115.

Examples

cb_2014_nga(M = 5, T = 1000, Rrup = 90, Rjb = 85, Rx = 85, W = 10, Zbot = 15, dip = 80,
lambda = 75, Fhw = 1, Vs30 = 350, region = 1, Zhyp = 8, Z25 = 999)

wltcwpf/GMPE documentation built on July 27, 2024, 4:28 p.m.