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TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Scour Considerations within AASHTO LRFD
Design Specifications
Presented by
Kornel Kerenyi, Ph.D.
Hydraulics Research Program Manager, FHWA
* American Association of State Highway and Transportation Officials (AASHTO)
* Load Resistance Factor Design (LRFD)
* National Hydraulic Engineering Conference (NHEC)
* Federal Highway Administration (FHWA)
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
• AASHTO LRFD Specifications
• Hydraulic Engineering Circular (HEC)-18**
• LRFD TechBriefs
1) Scour and Limit States within AASHTO LRFD Design.
2) Scour Considerations within AASHTO LRFD Design
Specifications.
Glossary** FHWA (2012), Hydraulic Engineering Circular No. 18, Evaluating Scour at Bridges, Fifth Edition, Publication No.: FHWA-HIF-12-003. Accessed 8/31/2020. https://www.fhwa.dot.gov/engineering/hydraulics/pubs/hif12003.pdf
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Worst Case Scour Depth
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Scenarios for Scour Design Flood (SDF)
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Scenarios for SDF (cont’d.)
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Scenarios for SDF (cont’d.)
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Scenarios for Scour Check Flood (SCF)
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Scenarios for SCF (cont’d.)
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Scenarios for SCF (cont’d.)
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Schematic of LRFD Pile/Shaft Design
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Schematic of AASHTO LRFD Shallow Foundation Design
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Min Bearing Depth for SCF linked to Extreme Event II Limit State
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Pile/Shaft Penetration for Strength or Service LS Considering SDF
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Pile/Shaft Penetration for Extreme Event II LS Considering SCF
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
Pile/Shaft Penetration for Extreme Event I & II LS Considering SCF
Source: FHWA.
TURNER-FAIRBANK HIGHWAY RESEARCH CENTERHydraulic Engineering Virtual 2020 NHEC
QUESTIONS?
Kornel Kerenyi
