Consequences-Based Analysis of Undrained Shear Behavior of Soils and Liquefaction Hazards, Phase 1: Filling the Data Gaps

The overall objective of this multi-year, multi-phase effort is to create a true performance-based model to evaluate the consequences of undrained response in all soils, including consequences resulting from earthquake-induced liquefaction and cyclic softening. Through this overall project, a more robust method for estimating field performance of soils during undrained events (including earthquakes) will be developed and tested. Due to the ability of the CPT to collect nearly continuous profiles of data in most soil types, for these studies we will focus initially on using CPT data for analyzing undrained shear behavior and liquefaction hazards. The framework is intended to be adaptable to other methods such as Standard Penetration Test (SPT), laboratory testing and analysis, and shear wave velocity (Vs) data. The objective of this Phase 1 study is to fill critical data gaps to document the undrained shear behavior of sands, silts, and clays for both static and dynamic loadings, and to provide a preliminary set of predictive models for the undrained shear response of soils. We anticipate that several state DOTs would be interested in participating in this initial pooled fund study. Later, in separate pooled fund studies, Phase 2 would focus on additional development of the models for consequences-based analysis of the undrained shear behavior of soils, and Phase 3 would focus on testing and validation of the models.

Language

  • English

Project

Subject/Index Terms

Filing Info

  • Accession Number: 01782702
  • Record Type: Research project
  • Source Agency: Federal Highway Administration
  • Contract Numbers: TPF-5(485)
  • Files: RIP, USDOT, STATEDOT
  • Created Date: Sep 22 2021 3:16PM