Load factors for earth retaining, reinforced concrete hydraulic structures based on a reliability index (β ) derived from the Probability of Unsatisfactory Performance (PUP) : phase 1 study

Ebeling, Robert M.; White, Barry C

doi:10.21079/11681/33227

Cited by 2 publications

(18 citation statements)

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“…The probability for the exceedance of limitations is called the Probability of Unsatisfactory Performance (PUP), which is measured using Reliability methods. The use of specific Reliability methodology (advanced second moment [ASM] methods) allows for the determination of a reliability index β (a scalar value) and the corresponding directional cosine αL(a vector value) for the normally distributed loads in a multivariate space (Ebeling and White 2019). The definition of the load factor γL (a vector value) for a single linear limit state can be determined directly from β and αL values in the following fashion:…”

Section: Overview Of the Translation From Reliability Index Into A Lomentioning

confidence: 99%

“…The engineering soil properties and their statistical distributions are summarized in Ebeling and White (2019). The soil strength parameter φ' for the three soil regions is assumed to be normally distributed with a lower bound at µ minus 3*σ and an upper bound at µ plus 5*σ, where σ is the standard deviation (= COV times µ).…”

Section: Report Contentsmentioning

confidence: 99%

“…Values for the inherent variability of strength properties for COVpoint estimates (about trend lines) are gathered for different soil types using laboratory and in situ strength tests while COVmeasurement error reflects the variability in test results used to define the soil (strength) property. Historical data on both are given in Chapter 3 of Ebeling and White (2019).…”

Section: Elmentioning

confidence: 99%

“…The Geotechnical strength data for natural soil deposits formed over geologic time clearly demonstrate anisotropic scale of fluctuation values in the horizontal and vertical directions; δV and δH. Appendix D of Ebeling and White (2019) provides a data base of values for δV and δH, as well as the ratio of δH/δV. These data were obtained from the statistical processing of shear strength data with (vertical and horizontal) distance in various soil types.…”

Section: Elmentioning

confidence: 99%

“…Over the last 20 years, engineers researching the spatial correlation of engineering soil properties have collected and studied the vertical and horizontal scale of fluctuation (or autocorrelation) engineering soil property data and some have made generalized observations. Several of these generalizations that have been published in the technical literature have been collected in Appendix D of Ebeling and White (2019) as well.…”

Section: Elmentioning

confidence: 99%

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Load and resistance factors for earth retaining, reinforced concrete hydraulic structures based on a reliability index (β) derived from the Probability of Unsatisfactory Performance (PUP) : phase 2 study

Ebeling¹,

White²

2021

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This technical report documents the second of a two-phase research and development (R&D) study in support of the development of a combined Load and Resistance Factor Design (LRFD) methodology that accommodates geotechnical as well as structural design limit states for design of the U.S. Army Corps of Engineers (USACE) reinforced concrete, hydraulic navigation structures. To this end, this R&D effort extends reliability procedures that have been developed for other non-USACE structural systems to encompass USACE hydraulic structures. Many of these reinforced concrete, hydraulic structures are founded on and/or retain earth or are buttressed by an earthen feature. Consequently, the design of many of these hydraulic structures involves significant soil structure interaction. Development of the required reliability and corresponding LRFD procedures has been lagging in the geotechnical topic area as compared to those for structural limit state considerations and have therefore been the focus of this second-phase R&D effort. Design of an example T-Wall hydraulic structure involves consideration of five geotechnical and structural limit states. New numerical procedures have been developed for precise multiple limit state reliability calculations and for complete LRFD analysis of this example T-Wall reinforced concrete, hydraulic structure.

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Section: Overview Of the Translation From Reliability Index Into A Lomentioning

confidence: 99%

Section: Report Contentsmentioning

confidence: 99%

Section: Elmentioning

confidence: 99%

Section: Elmentioning

confidence: 99%

Section: Elmentioning

confidence: 99%

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Load and resistance factors for earth retaining, reinforced concrete hydraulic structures based on a reliability index (β) derived from the Probability of Unsatisfactory Performance (PUP) : phase 2 study

Ebeling¹,

White²

2021

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Load and resistance factors from reliability analysis Probability of Unsatisfactory Performance (PUP) of flood mitigation, batter pile-founded T-Walls given a target reliability index (𝛽)

Ebeling¹,

White²,

Hite³

et al. 2023

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This technical report documents the research and development (R&D) study in support of the development of a combined Load and Resistance Factor Design (LRFD) methodology that accommodates both geotechnical and structural design limit states for design of the US Army Corps of Engineers (USACE) batter pile-founded, reinforced concrete flood walls. Development of the required reliability and corresponding LRFD procedures has been progressing slowly in the geotechnical topic area as compared to those for structural limit state considerations, and therefore this has been the focus of this first-phase R&D effort. This R&D effort extends reliability procedures developed for other non-USACE structural systems, primarily bridges and buildings, for use in the design of batter pile-founded USACE flood walls. Because the foundation system includes batter piles under flood loading, the design procedure involves frame analysis with significant soil structure interaction. Three example batter pile-founded T-Wall flood structures on three different rivers have been examined considering 10 geotechnical and structural limit states. Numerical procedures have been extended to develop precise multiple limit state Reliability calculations and for complete LRFD analysis of the example batter pile-founded, T-Wall reinforced concrete, flood walls.

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Load factors for earth retaining, reinforced concrete hydraulic structures based on a reliability index (β ) derived from the Probability of Unsatisfactory Performance (PUP) : phase 1 study

Cited by 2 publications

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Load and resistance factors for earth retaining, reinforced concrete hydraulic structures based on a reliability index (β) derived from the Probability of Unsatisfactory Performance (PUP) : phase 2 study

Load and resistance factors for earth retaining, reinforced concrete hydraulic structures based on a reliability index (β) derived from the Probability of Unsatisfactory Performance (PUP) : phase 2 study

Load and resistance factors from reliability analysis Probability of Unsatisfactory Performance (PUP) of flood mitigation, batter pile-founded T-Walls given a target reliability index (𝛽)

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