Analysis, inspection, and repair methods for pin connections on Illinois bridges

South, Jeffery M.; Hahin, Christopher; Telford, Richard O.

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Analysis, inspection, and repair methods for pin connections on Illinois bridges

1992-04-01
By South, Jeffery M. ; Hahin, Christopher ; Telford, Richard O.

File Language:

English

Details

Creators:

South, Jeffery M. ; Hahin, Christopher ; Telford, Richard O.
Corporate Contributors:

Illinois. Dept. of Transportation ; United States. Federal Highway Administration
Subject/TRT Terms:
Publication/ Report Number:

FHWA/IL/PR-107 ; PRR-107
Resource Type:

Research Paper
Geographical Coverage:

Illinois
Edition:

Final report 6/88 to 6/91
Corporate Publisher:

Illinois. Dept. of Transportation. Bureau of Materials and Physical Research
Description:

This report documents methods used in Illinois for analysis, inspection, and repair of pin connections in bridges. Weldable foil strain gages were used to detect the effects of unknown levels of fixity in pins on cantilever truss bridges. Other methods for detecting pin movement, including electronic angle sensors and scratch-type pointer gages were also investigated. The maximum effect of complete fixity on pins and hangers was estimated with finite element models of both cantilever truss and cantilever girder bridges. A pin inspection procedure using ultrasonic instrumentation was developed and tested throughout the state. Design deficiencies of pin connections are noted. Modernized details which eliminate many of the existing deficiencies are presented. The improvements include better tolerances on fits and finishes, increased degrees of freedom of rotation, provisions for periodic lubrication, high strength, corrosion resistant alloys, extreme pressure lubricants, and toughness requirements based on alloy yield strength. A method for calculating factor of safety for pins based on distortion energy principles is presented.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/14126/dot_14126_DS1.pdf
File Type:

[PDF - 3.54 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha256:1c160d9643ce085ffa3c0dfd9f825b104096ff56629348f3ceb22c9b684b9a12

File Language:

English

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