What is it about?
Structural response uncertainty under seismic loads is quantified through an earthquake Intensity Measure (PGA, PGV or Spectral Acc. for instance). Such an Intensity Measure selection plays a vital role, and depending upon the Intensity Measure selected the structural response uncertainty changes. This paper proposes an easy-to-compute quantitative metric to gauge the quality of alternative earthquake Intensity Mesures.
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Why is it important?
Seismic response analysis is a key step towards loss estimation of buildings and hence selecting optimal buildings designs. Earthquake Intensity Measure selection plays a significant role towards accurately quantifying uncertainty in the structure's response and hence in economic loss (also acknowledged by numerous other studies). This paper is the first-ever to adequately quantify the desirable characteristics of alternative Intensity Measures thereby leading to a robust decision-making on the best building design.
Perspectives
While researchers have focused on selecting a single/best earthquake Intensity Measure given a structure, I think multiple Intensity Measures contribute towards the uncertainty in structural response. I'm working on a method using Naive Bayes to -- naturally -- link the different uncertainty quantifications made through using different Intensity Measures.
Somayajulu Dhulipala
Virginia Polytechnic Institute and State University
Read the Original
This page is a summary of: A site-consistent method to quantify sufficiency of alternative IMs in relation to PSDA, Earthquake Engineering & Structural Dynamics, August 2017, Wiley,
DOI: 10.1002/eqe.2955.
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