Ground-Motion Prediction Equations for Arias Intensity, Cumulative Absolute Velocity, and Peak Incremental Ground Velocity for Rock Sites in Different Tectonic Environments

摘要

This article presents the development of ground-motion prediction equations for the maximum rotated (RotD100) horizontal component of five intensity measures: Arias intensity, cumulative absolute velocity, cumulative absolute velocity above the 5 cm/s(2) threshold (CAV(5)), standardized cumulative absolute velocity (CAV(STD)), and peak incremental ground velocity. The equations predict the ground-motion intensity at outcropping rock sites. This scope reflects the critical importance of outcropping rock-motion properties that can be employed as predictors of certain site-response quantities or used as input to site-response and soil-structure interaction analyses. We present equations for the shallow crustal, intraplate, and subduction tectonic environments and between-and within-event standard deviations for each. We also provide supplemental logistic models predicting the probability that CAV(5) and CAV(STD) exceed zero in a given earthquake scenario. These equations are valid for magnitudes between 4.0 and 9.0 and source-to-site distances up to 400 km, depending on the tectonic environment.