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Probabilistic Approach for Site Response Analysis and Seismic Microzonation

Description: 

The purpose of site response analysis is to estimate probable earthquake characteristics on the ground surface to mitigate earthquake damage for the new buildings as well as for the existing building stock. The uncertainties in source characteristics, soil profile, soil properties, and characteristics of the building inventory would introduce critical uncertainties associated with these analyses. At this stage, the probability distribution of the related earthquake parameters on the ground surface may be determined considering all possible input acceleration time histories, site profiles, and dynamic soil properties. One option, the variability in earthquake source and path effects may be considered using a large number of acceleration records compatible with the site-dependent earthquake hazard. Likewise, a large number of soil profiles may be used to account for the site condition variability. A seismic microzonation methodology is proposed based on the probabilistic assessment of these factors involved in site response analysis. The second important issue in the seismic microzonation procedure is the selection of microzonation parameters. The purpose is mitigation of structural damage, it is possible to adopt earthquake parameters like cumulative average velocity (CAV) or Housner intensity (HI) that was observed to have a better correlation with building damage during past earthquakes. The main approach is to develop a microzonation procedure for ground shaking intensity considering probabilistic values of ground motion parameters.

Session: Regional-Scale Hazard, Risk and Loss Assessments - I

Type: Oral

Date: 5/2/2024

Presentation Time: 04:30 PM (local time)

Presenting Author: Atilla

Student Presenter: No

Invited Presentation: 

Authors