Towards improved earthquake preparedness: Site effects considering multiple seismic zones
Towards improved earthquake preparedness: Site effects considering multiple seismic zones
Site response analysis is a key aspect in the quantification of seismic risk. Parameters defining the main dynamic properties that characterize a specific site mainly depend on the ground motion at the bedrock level and the soil features close to the ground surface. Integrating both, ground motion and soil features, within a probabilistic framework that considers the randomness of the mechanical properties of existing civil infrastructures is challenging, especially because of the computational effort involved. In addition, the dynamic properties of the soil tend to be affected at very low shear strains. These limits mainly depend on the duration and intensity of the ground motion. This study aims to apply a recently developed computational framework that allows for probabilistic considerations of the dynamic interaction between the ground and the surrounding structures during seismic events. Specifically, a set of ground motion records has been selected to propagate through random soil profiles. The resulting signals at the ground surface are transmitted to building models of varying heights, and their dynamic behaviour is evaluated. Then, using the cloud analysis approach, intensity measures, vibration periods of the degraded soil profile and structures have been used to search for the best-fit model that minimizes errors in predicting the influence of the site. The results of this study are expected to have significant practical applications in earthquake engineering and risk prevention.
A. M. Zapata-Franco; Y. F. Vargas-Alzate; Jean Vaunat; Alessandra Di Mariano
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
B - Geohazards
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