A novel framework for extracting dynamic soil behavior from downhole array data

C. C. Tsai, Y. M.A. Hashash

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Seismic site response analysis is commonly used to predict ground response due to local soil effects. An increasing number of downhole arrays are deployed to measure motions at the ground surface and within the soil profile and to provide a check on the accuracy of site response analysis models. Ad-hoc approaches and more recently system identification and optimization techniques are often adopted to adjust soil model properties to match field observations. However, these approaches are not always successful and are limited by the specific cyclic soil constitutive model used in the analysis. A novel inverse analysis framework, SelfSim (Self learning engineering simulations), to integrate site response analysis and field measurement is introduced. This framework uses downhole array measurements to extract the underlying soil behavior and develops a constitutive model of the soil. The resulting soil model, used in a site response analysis, provides correct ground response and can be used in the forward prediction of future earthquake events. The soil model can continuously evolve using additional field information. The performance of the algorithm is successfully demonstrated using two synthetic arrays and is currently being applied to field recordings.

Original languageEnglish (US)
Title of host publication8th US National Conference on Earthquake Engineering 2006
Pages4529-4538
Number of pages10
StatePublished - Dec 1 2006
Event8th US National Conference on Earthquake Engineering 2006 - San Francisco, CA, United States
Duration: Apr 18 2006Apr 22 2006

Publication series

Name8th US National Conference on Earthquake Engineering 2006
Volume8

Other

Other8th US National Conference on Earthquake Engineering 2006
Country/TerritoryUnited States
CitySan Francisco, CA
Period4/18/064/22/06

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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