org.opensha.sha.imr.attenRelImpl.calc
Class Borcherdt2004_SiteAmpCalc

java.lang.Object
  org.opensha.sha.imr.attenRelImpl.calc.Borcherdt2004_SiteAmpCalc

All Implemented Interfaces:

Serializable

public class Borcherdt2004_SiteAmpCalc
extends Object
implements Serializable

Title: Borcherdt2004_SiteAmpCalc

Description: This computes amplification factors using equations 7a and 7b in the Appendix of Borecherdt (1994, Earthquake Spectra, Vol. 10, No. 4, 617-653). Note that the ma and mv coefficients are linearly interpolated at intermediate input ground motions (PGA).

Version:

1.0

Author:

Ned Field

See Also:

Serialized Form

Constructor Summary

Borcherdt2004_SiteAmpCalc()

Method Summary

double	getMidPeriodAmp(double vs30, double vs30_ref, double pga) This returns the mid-period amplification factor
double	getShortPeriodAmp(double vs30, double vs30_ref, double pga) This returns the short-period amplification factor

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Borcherdt2004_SiteAmpCalc

public Borcherdt2004_SiteAmpCalc()

Method Detail

getShortPeriodAmp

public double getShortPeriodAmp(double vs30,
                                double vs30_ref,
                                double pga)

This returns the short-period amplification factor

Parameters:

vs30 - - 30-meter-average shear wave velocity (m/sec)

vs30_ref - - reference Vs30

pga - - peak ground acceleration (g)

Returns:

getMidPeriodAmp

public double getMidPeriodAmp(double vs30,
                              double vs30_ref,
                              double pga)

This returns the mid-period amplification factor

Parameters:

vs30 - - 30-meter-average shear wave velocity (m/sec)

vs30_ref - - reference Vs30

pga - - peak ground acceleration (g)

Returns: