Correlation between Ground Motion and Building Response using California Earthquake Records

Abstract

Using data from the California Strong Motion Instrumentation Program, we studied the relationship between building response and parameters describing the noxiousness of ground motion. According to vulnerability methods that use structural drift as damage criteria, we estimated the building response on the basis of the normalized relative roof displacement (NRRD), considered as damage criteria. The relationships between the NRRD and the intensity measures of the ground motion are developed using simulated annealing method. Grouping buildings by typology (defined according to their main construction material and height) reduces the variability of the building response. Furthermore, by combining IMs, the NRRD can be predicted more accurately by a building damage prediction equation. A functional form is thus proposed to estimate the NRRD for several building typologies, calibrated on the building responses recorded in California. This functional form can be used to obtain a fast and overall damage forecast after an earthquake.

A rapid response magnitude scale for timely assessment of the high frequency seismic radiation

“…To quantify the impact of M r on predicting the ground shaking potential, we follow the earthquake engineering approach of analyzing the event-specific deviations from the expected mean regional attenuation trend. We refer to PGV as a measure of earthquake shaking potential, since it is controlled by the seismic energy at intermediate frequencies and, hence, better suited than peak ground acceleration (PGA) for statistical analysis correlating ground motion with damage 40 . We calibrate a ground motion prediction equation (GMPE) to model the PGV scaling with distance and magnitude in the target area (see Text Sc).…”

Metamaterial-like transformed urbanism

“…The concept of smart cities has been aired for about two decades, a number of geophysicists, notably at University Joseph-Fourier in Grenoble, have already pointed out specific configurations of megalopolis which according to ambient seismic noise display local resonances during earthquakes [23,42]. We would like to bridge this concept with the pattern of urban fabric, but with the perspective of side view.…”

Earthquake risk in reinforced concrete buildings during aftershock sequences based on period elongation and operational earthquake forecasting

“…The fragility curves are then computed, giving the probability of each degraded building model to exceed the selected period elongation thresholds as a function of an intensity measure (IM). Although other IMs may correlate better with the structural response [68,69], peak ground acceleration (PGA) has been used in operational post-event response systems for structural evaluation [1]. Therefore, the PGA is adopted as the IM in this study.…”