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Title: SURVEY OF BRIDGE MOVEMENTS IN THE WESTERN UNITED STATES
Accession Number: 00196573
Record Type: Component
Availability: Find a library where document is available Abstract: The design of bridge superstructures is usually based on the assumption that less than 25 mm (1 in) of movement will occur within the substructure. Consequently, the foundation engineer must find soils at a proposed site of sufficient bearing capacity to limit movement to this small value. Often the movement criteria will dictate the size or depth of the foundation, thereby increasing its cost needlessly if the criteria established are too strict. The purpose of this survey is to document field performance of various structures that have moved and obtain an evaluation as to the acceptability of these movements by various state highway agencies. The 35 structures reported in this paper include 54 movements of structural elements. Sixty percent of these represent movements at the abutments and 40 percent represent movements at piers. Although some very large vertical movements were reported tolerable for some of the older structures, movements in excess of 63 mm (2.5 in) within the structure were usually considered objectionable from a rideability viewpoint. Horizontal movements in excess of 50 mm (2 in) usually caused structural distress that was considered harmful. Recommendations are made to improve reporting procedure and make use of available material. Emphasis is on more thorough involvement between designers and maintenence crews in solving movement problems. /Author/
Supplemental Notes: Publication of this paper sponsored by Committee on Foundations of Bridges and Other Structures. 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 #: 01411517
Authors: Walkinshaw, John LDiscussers: Emanuel, Jack H
Pagination: pp 6-12
Publication Date: 1978
Serial: ISBN: 030902823X
Media Type: Print
Features: Figures
(3)
; Maps; References
(23)
; Tables
(1)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Bridges and other structures; Geotechnology; Highways
Files: TRIS, TRB
Created Date: Aug 28 1979 12:00AM
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