New predictive equations for Arias intensity from crustal earthquakes in New Zealand

Abstract

Arias Intensity (Arias, MIT Press, Cambridge MA, pp 438-483, 1970) is an important measure of the strength of a ground motion, as it is able to simultaneously reflect multiple characteristics of the motion in question. Recently, the effectiveness of Arias Intensity as a predictor of the likelihood of damage to short-period structures has been demonstrated, reinforcing the utility of Arias Intensity for use in both structural and geotechnical applications. In light of this utility, Arias Intensity has begun to be considered as a ground-motion measure suitable for use in probabilistic seismic hazard analysis (PSHA) and earthquake loss estimation. It is therefore timely to develop predictive equations for this

2D dynamic studies combined with the surface curvature analysis to predict Arias Intensity amplification

“…These studies show that the spectral amplification and the amplification of Ia values are bound together. Such links are also confirmed by Stafford et al (2009) who relate the value of Ia to the set of seismological descriptors, including the central frequency of shaking.…”

“…Travasarou et al 2003) or through the site variables reflecting the soil/rock site composition (see, e.g. Sabetta and Pugliese 1996;Rathje et al 2004;Romeo 2000;Stafford et al 2009;Chousianitis et al 2014).…”

An energy-based envelope function for the stochastic simulation of earthquake accelerograms

“…where   a t is the acceleration time-history (see Stafford et al 2008 for a more thorough definition). The temporal accumulation of Arias intensity is best viewed using a Husid plot (either in an absolute or normalized form).…”

“…For the purpose of deriving the envelope function of this study, the first option is the most direct. However, it is currently rather rare for PSHA to be conducted in terms of Arias intensity despite the existence of some empirical predictive models that have been derived for this purpose (e.g., Travasarou et al, 2003;Stafford et al, 2008). This is not restrictive at all however, as the second approach, based upon PSHA conducted for spectral acceleration, actually leads to a more accurate prediction of the envelope function provided that the correlation between spectral acceleration and Arias intensity is accounted for.…”

Estimation of building damage rates from future earthquakes in Taiwan in terms of MMI

“…On the other hand, peak ground acceleration (PGA) instrumentally recorded at ground surface describes the intensity of strong ground motion. Previously, many researchers have proposed a relationship between PGA and MMI (Gutenberg and Richter 1956;Hershberger 1956;Trifunac and Brady 1975;Atkinson 2008;Allen and Wald 2009;Stafford et al 2009;Bommer et al 2010;Campbell and Bozorgnia 2011;Bertil et al 2012). Most seismic hazard models provide probabilistic information on PGA.…”