Correlation of ground motion duration with its intensity metrics: A simulation based approach

TL;DR

This paper introduces a simulation-based method to analyze how ground motion duration correlates with intensity measures, highlighting the impact of data set selection and specific parameters on correlation outcomes.

Contribution

It presents a novel simulation approach to assess duration-intensity correlations under various scenarios, addressing data limitations and parameter influences.

Findings

Case 1 shows no significant correlation.

Case 2 demonstrates a significant positive correlation.

Case 3 shows a significant negative correlation.

Abstract

There are different kinds of intensity measures to characterize the main properties of the earthquake records. This paper proposes a simulation-based approach to compute correlation coefficients of motion duration and intensity measures of the earthquake ground motions. This method is used to investigate the influence of the ground motion data set selection in resulting duration-intensity correlation coefficients. The simulation procedure is used to tackle the problem of inadequate available ground motions with specific parameters. Correlation coefficients are investigated in three different cases. In case one, simulated ground motions differ in terms of earthquake source parameters, site characteristics, and site-to-source distances. In case two, ground motions are simulated in a specific site from probable earthquake events. In case 3, ground motions are simulated from a specific event in different sites. The first case doesnt show a significant correlation, while the second and the third case demonstrate significant positive and negative correlations, respectively.