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Title:

Improving the Fatigue Performance of Drilled Holes in Steel Bridges Through Use of Mechanical Treatments

Accession Number:

01516729

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

A proof-of-concept study was performed to determine the effectiveness of two mechanical techniques for improving fatigue life of drilled holes in steel bridges. The treatments studied were cold-expansion of drilled holes and a newly-developed technique termed "Piezoelectric Impact Compressive Kinetics," or PICK treatment. The study involved testing 15 fatigue specimens, examining levels of retained expansion in 16 specimens, and a metallurgical investigation to compare grain sizes in treated and untreated specimens. It was found that both cold-expansion and PICK-treatment of drilled holes were effective in extending fatigue initiation life beyond that measured for untreated specimens. Deformation measurements showed that both techniques were capable of producing enough permanent retained expansion (RE) to improve fatigue life. PICK-treated specimens exhibited greater fatigue lives and higher RE values than specimens subjected to cold-expansion only.

Supplemental Notes:

This paper was sponsored by TRB committee AFF20 Steel Bridges.

Monograph Accession #:

01503729

Report/Paper Numbers:

14-5208

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Simmons, Gary G
Bennett, Caroline R
Matamoros, Adolfo B
Barrett-Gonzalez, Ron
Rolfe, Stanley T

Pagination:

13p

Publication Date:

2014

Conference:

Transportation Research Board 93rd Annual Meeting

Location: Washington DC
Date: 2014-1-12 to 2014-1-16
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Uncontrolled Terms:

Cold expansion; Drilled holes

Subject Areas:

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

Source Data:

Transportation Research Board Annual Meeting 2014 Paper #14-5208

Files:

TRIS, TRB, ATRI

Created Date:

Jan 27 2014 3:49PM