Simplified Cone Penetration Test Performance-Based Assessment of Liquefaction and Effects: Phase 1, Tasks 1–4
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2021-08-01
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Edition:Final Report, May 2016 - June 2017
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Abstract:The purpose of the research presented is to provide the benefit of the full performance-based probabilistic earthquake hazard analysis using Cone Penetration Test (CPT) data, without requiring special software, training, and experience. To do this, simplified models of liquefaction triggering, post-liquefaction settlement, and lateral spread displacement that approximate the results of the full probabilistic analysis were developed. The full project scope consisted of two phases: Phase 1) the development of a research tool to run full performance-based probabilistic calculations (Tasks 1 through 4), and Phase 2) the development of simplified performance-based methods (Tasks 5 through 10). This final report volume addresses the results of Phase 1 of the pooled fund study TPF-5(338) research contract. The program, CPTLiquefY, is a research tool created to run full performance-based probabilistic calculations of liquefaction triggering, liquefaction-induced settlement, and lateral spread displacement. CPTLiquefY currently has the capabilities of reading in a CPT file, running soil parameter calculations, pseudo-probabilistic liquefaction analyses, and deterministic liquefaction analyses. Full-probabilistic methods are completely operational in the program, along with a connection to a new off-line USGS deaggregation tool that gives access to the 2014 USGS deaggregation models. This program, and the corresponding results, have been analyzed for 10 different cities and 20 CPT profiles. The results are compared to pseudo-probabilistic and semi-probabilistic methods.
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