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Title:

NATURAL FREQUENCIES OF CONCRETE BRIDGES IN THE PACIFIC NORTHWEST

Accession Number:

00637830

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309054664

Abstract:

Analyses of field ambient vibration were performed on 50 concrete bridge spans along Interstate highways I-5 and I-405 in Washington State. These 50 spans included 21 pretensioned concrete beam (PCB) spans, 19 reinforced concrete box-girder (CBOX) spans, and 10 reinforced concrete slab (CS) spans. Eight measurement transducers were used to record ambient bridge vibrations at three locations on each span: midspan, one-quarter point, and one support. These records of bridge motion versus time were each subjected to a fast Fourier transformation, and plots of amplitude versus frequency were generated for each record. The plots of amplitude versus frequency were used to determine the fundamental vertical and lateral frequencies for the bridge spans measured. These fundamental frequencies were used with the bridge design parameters to derive empirical formulas that will be used to estimate the fundamental vertical and lateral frequencies of other PCB, CBOX, and CS bridge spans along I-5, I-205, and I-405 in the Pacific Northwest.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1393, 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 Title:

Structures

Monograph Accession #:

01403235

Language:

English

Authors:

Dusseau, Ralph A
Dubaisi, Hassan N

Pagination:

p. 119-132

Publication Date:

1993

Serial:

Transportation Research Record

Issue Number: 1393
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309054664

Features:

Figures (7) ; References (10) ; Tables (7)

Uncontrolled Terms:

Natural frequencies

Geographic Terms:

Pacific Northwest; Pacific States

Subject Areas:

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

Files:

TRIS, TRB

Created Date:

Oct 15 1993 12:00AM

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