TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

AFTER-FRACTURE REDUNDANCY OF TWO-GIRDER BRIDGE: TESTING I-40 BRIDGES OVER RIO GRANDE

Accession Number:

00711736

Record Type:

Component

Availability:

Find a library where document is available


Order URL: http://worldcat.org/isbn/0309061091

Abstract:

The I-40 bridges over the Rio Grande in Albuquerque, New Mexico, were due to be razed in the fall of 1993 because of geometry and traffic safety considerations, thus providing a unique opportunity for testing them. These medium-span steel bridges represent a common design in the United States and are classified by AASHTO as nonredundant "fracture critical" two-girder steel bridges ("fracture critical" classification means that failure of a primary member would probably cause collapse of the bridge). The subject bridge, built in 1963, is 1,275 ft (390 m) long and consists of three medium-span continuous units with spans of 131, 163, and 131 ft (40, 50, and 40 m) each. The bridge was field tested to determine the impact of a near full-depth girder fracture on the redistribution of loads, the load capacity, and the potential for collapse. Four levels of damage were introduced in the middle span of the north plate girder by making various cuts in the web and the flange of the girder. The final cut resulted in a crack 6 ft (1.8 m) deep in the 10-ft (3.1-m)-deep girder, extending from the bottom flange to the floor beam to girder connection. Data were taken under dead load and under a static live load consisting of an 82,000-lb (365,000-N) truck. The fractured bridge proved to be stable, with minimal deflection and no yielding. The after-fracture response and the load redistribution in the fractured bridge were evaluated. The contribution of the various members to the redundancy of the structure was assessed.

Supplemental Notes:

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 #:

00711666

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Idriss, R L
White, K R
Woodward, C B
Jauregui, D V

Pagination:

p. 316-326

Publication Date:

1995

Serial:

Transportation Research Board Conference Proceedings

Issue Number: 7
Publisher: Transportation Research Board
ISSN: 1073-1652

Conference:

Fourth International Bridge Engineering Conference

Location: San Francisco, California
Date: 1995-8-28 to 1995-8-30
Sponsors: Transportation Research Board; Federal Highway Administration; Federal Railroad Administration; American Association of State Highway and Transportation Officials; and California Department of Transportation.

ISBN:

0309061091

Features:

Figures (12) ; References (5) ; Tables (6)

Uncontrolled Terms:

Load carrying capacity

Subject Areas:

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

Files:

TRIS, TRB

Created Date:

Sep 6 1995 12:00AM