Probabilistic bridge scour estimates

Peggy Ann Johnson, Daniel A. Dock

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

Scour at bridges is generally estimated as a deterministic value. Other loads at bridges, such as vessel impact and wind loads, are determined as probabilistic values. In an effort to use probabilistic estimates as a tool in decision making, a probabilistic framework was developed for estimating scour using deterministic methods given in the Hydraulic Engineering Circular (HEC-18). Uncertainties in the HEC-18 modl, in determination of the parameters and in estimating the hydraulic variables for a large event storm, were included in the analysis. The probabilistic framework can then be used as the basis for determining the likelihood of achieving various scour depths, probabilites of failure for various foundation designs, pile depths necessary to achieve a specified probability of failure for a design bridge life span, and for comparing designs based on various storm events. The Bonner Bridge in North Carolina is used as an example. Pile depths appropriate for various design life spans are calculated based on both 100- and 500- yr storm events.

Original languageEnglish (US)
Pages (from-to)750-754
Number of pages5
JournalJournal of Hydraulic Engineering
Volume124
Issue number7
DOIs
StatePublished - Jul 1 1998

Fingerprint

Scour
scour
Piles
pile
Hydraulics
vessel
Decision making
decision making
hydraulics

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Water Science and Technology
  • Mechanical Engineering

Cite this

Johnson, Peggy Ann ; Dock, Daniel A. / Probabilistic bridge scour estimates. In: Journal of Hydraulic Engineering. 1998 ; Vol. 124, No. 7. pp. 750-754.
@article{d7da6a833d784b7487049d217a44f0d2,
title = "Probabilistic bridge scour estimates",
abstract = "Scour at bridges is generally estimated as a deterministic value. Other loads at bridges, such as vessel impact and wind loads, are determined as probabilistic values. In an effort to use probabilistic estimates as a tool in decision making, a probabilistic framework was developed for estimating scour using deterministic methods given in the Hydraulic Engineering Circular (HEC-18). Uncertainties in the HEC-18 modl, in determination of the parameters and in estimating the hydraulic variables for a large event storm, were included in the analysis. The probabilistic framework can then be used as the basis for determining the likelihood of achieving various scour depths, probabilites of failure for various foundation designs, pile depths necessary to achieve a specified probability of failure for a design bridge life span, and for comparing designs based on various storm events. The Bonner Bridge in North Carolina is used as an example. Pile depths appropriate for various design life spans are calculated based on both 100- and 500- yr storm events.",
author = "Johnson, {Peggy Ann} and Dock, {Daniel A.}",
year = "1998",
month = "7",
day = "1",
doi = "10.1061/(ASCE)0733-9429(1998)124:7(750)",
language = "English (US)",
volume = "124",
pages = "750--754",
journal = "Journal of Hydraulic Engineering",
issn = "0733-9429",
publisher = "American Society of Civil Engineers (ASCE)",
number = "7",

}

Probabilistic bridge scour estimates. / Johnson, Peggy Ann; Dock, Daniel A.

In: Journal of Hydraulic Engineering, Vol. 124, No. 7, 01.07.1998, p. 750-754.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Probabilistic bridge scour estimates

AU - Johnson, Peggy Ann

AU - Dock, Daniel A.

PY - 1998/7/1

Y1 - 1998/7/1

N2 - Scour at bridges is generally estimated as a deterministic value. Other loads at bridges, such as vessel impact and wind loads, are determined as probabilistic values. In an effort to use probabilistic estimates as a tool in decision making, a probabilistic framework was developed for estimating scour using deterministic methods given in the Hydraulic Engineering Circular (HEC-18). Uncertainties in the HEC-18 modl, in determination of the parameters and in estimating the hydraulic variables for a large event storm, were included in the analysis. The probabilistic framework can then be used as the basis for determining the likelihood of achieving various scour depths, probabilites of failure for various foundation designs, pile depths necessary to achieve a specified probability of failure for a design bridge life span, and for comparing designs based on various storm events. The Bonner Bridge in North Carolina is used as an example. Pile depths appropriate for various design life spans are calculated based on both 100- and 500- yr storm events.

AB - Scour at bridges is generally estimated as a deterministic value. Other loads at bridges, such as vessel impact and wind loads, are determined as probabilistic values. In an effort to use probabilistic estimates as a tool in decision making, a probabilistic framework was developed for estimating scour using deterministic methods given in the Hydraulic Engineering Circular (HEC-18). Uncertainties in the HEC-18 modl, in determination of the parameters and in estimating the hydraulic variables for a large event storm, were included in the analysis. The probabilistic framework can then be used as the basis for determining the likelihood of achieving various scour depths, probabilites of failure for various foundation designs, pile depths necessary to achieve a specified probability of failure for a design bridge life span, and for comparing designs based on various storm events. The Bonner Bridge in North Carolina is used as an example. Pile depths appropriate for various design life spans are calculated based on both 100- and 500- yr storm events.

UR - http://www.scopus.com/inward/record.url?scp=0032124106&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032124106&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)0733-9429(1998)124:7(750)

DO - 10.1061/(ASCE)0733-9429(1998)124:7(750)

M3 - Article

VL - 124

SP - 750

EP - 754

JO - Journal of Hydraulic Engineering

JF - Journal of Hydraulic Engineering

SN - 0733-9429

IS - 7

ER -