4. Nomenclature

A215 Average spectral intensity from 0.2T to 1.5T

DBE Design Base Earthquake

dt Delta t, i.e. the time step

ET Endurance Time

ETA Endurance Time Analysis

ETEF Endurance Time Excitation Function

ETM Endurance Time Method

g Gravitational acceleration (=9.81 m/s^2)

GM Ground Motion

MCE Maximum Considered Earthquake

NPTS Number of points

PGA Peak Ground Acceleration

PR Return period (years)

Sa Spectral acceleration

t Time

T Fundamental period of vibration

T0 Fundamental period of vibration (mode 1)

s Second