TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

RETROFITTING OF REINFORCED CONCRETE BRIDGE COLUMNS

Accession Number:

00627148

Record Type:

Component

Availability:

Find a library where document is available


Order URL: http://worldcat.org/isbn/0309054141

Abstract:

The seismic performances of one control and three retrofitted half-scale circular reinforced concrete columns were studied. The columns were 10 ft high, 18 in. in diameter, fixed at the base, and free at the top. An axial, vertical load of 158 kips was applied at the top, which was translated horizontally in a plane symmetrically about the vertical in such a way as to produce a maximum of four times the yield strain in the longitudinal reinforcing steel at the extremes of the first cycle. The columns were then oscillated between these extreme displacements of the first cycle until the lateral forces required to produce these translations approached zero. The measure of seismic durability used was the number of such cycles that a column sustained before losing structural integrity. The four columns were all made at the same time with 3,200-lb/sq in. concrete and the same reinforcing and ties. The arrangement was intended to model that of bridge columns of the 1960s. Three columns were retrofitted with prestressed, externally located circular ties at intervals along the lower 3 ft. The spacing and size of these ties varied from column to column. The control column sustained less than one cycle before losing structural integrity; the retrofitted columns sustained a minimum of 13 cycles.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1371, Bridge, Culvert, and Tunnel Research. 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 #:

01405120

Language:

English

Authors:

Coffman, Harvey L

Pagination:

p. 110-118

Publication Date:

1992

Serial:

Transportation Research Record

Issue Number: 1371
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309054141

Features:

Figures (9) ; Photos (3) ; References (7) ; Tables (3)

Old TRIS Terms:

Subject Areas:

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

Files:

TRIS, TRB

Created Date:

Mar 24 1993 12:00AM

More Articles from this Serial Issue: