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Title:

EVALUATION OF BRIDGE VULNERABILITY TO HYDRAULIC FORCES, STREAM INSTABILITY, AND SCOUR

Accession Number:

00611117

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309050677

Abstract:

The principal causes of failure of bridges over rivers and streams are scour at the foundations, channel movement and hydraulic forces. Scour is the removal of material from around piers and abutments due to extreme flows, ice jams or debris which destroy the foundation support and result in excessive settlement or movement and loss of support for the superstructure. Channel movement is the natural realignment of the river channel so that the stream encroaches on a pier, abutment or bent, resulting in failure from scour as described above. In addition, channel movement can erode the approaches to the bridge. Hydraulic forces from the impact of ice or debris against a pier, abutment or superstructure can cause dislocation of the bridge elements. Buoyancy and flotation, as the result of submergence, can also dislodge bridge decks off of their supports. A procedure for conducting a comprehensive hydraulic evaluation of existing bridges to determine their vulnerability to scour, stream instability, and hydraulic forces is given in this paper. The procedure is based on the five step process recommended in the September 1988 FHWA Technical Advisory on Scour.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1290, Third Bridge Engineering Conference, March 10-13, 1991, Denver, Colorado, Volume 1. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

Monograph Accession #:

01411114

Authors:

Richardson, E V
Huber, F W

Pagination:

p. 25-38

Publication Date:

1991

Serial:

Transportation Research Record

Issue Number: 1290
Publisher: Transportation Research Board
ISSN: 0361-1981

Conference:

Bridge Engineering Conference, 3rd, 1991, Denver, Colorado, USA

Location: Denver Colorado, United States
Date: 1991-93-10 to 1991-3-13

ISBN:

0309050677

Features:

References (8)

Uncontrolled Terms:

Debris; Stream stability; Vulnerability

Subject Areas:

Bridges and other structures; Design; Highways; Safety and Human Factors; I24: Design of Bridges and Retaining Walls

Files:

TRIS, TRB

Created Date:

Jul 31 1991 12:00AM