Fatigue Assessment of Bridge Members Based on In-Service Stresses-Interim Report No. 2: Data Acquisition System for Strain Measurements

Zwememan, Farrel J.; Kelly, John W.; Johnston, Orin A.

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Fatigue Assessment of Bridge Members Based on In-Service Stresses-Interim Report No. 2: Data Acquisition System for Strain Measurements

1997-06-01
By Zwememan, Farrel J. ; Kelly, John W. ; Johnston, Orin A.

File Language:

English

Details

Creators:

Zwememan, Farrel J. ; Kelly, John W. ; Johnston, Orin A.
Corporate Creators:

Oklahoma State University. School of Civil Engineering
Corporate Contributors:

Oklahoma. Department of Transportation. Materials Division ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:

Assessments Bridges Data Collection Fatigue (Mechanics) Fracture Mechanics Guidelines Plate Girders Procedures Repairing Testing Welding
Publication/ Report Number:

FHWA\OK-97(05)
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Interim Report: Dec 1993-June 1997
Corporate Publisher:

Oklahoma. Department of Transportation
Abstract:

This report contains information regarding construction of the data acquisition system which may be useful for system maintenance and operation. This report also contains a set of general guidelines for conducting a bridge test and applying the test results. It is recommended that a complete bridge evaluation include a thorough visual inspection, an analysis of the structure, and a load test. The load test should include both a series of short-term tests in which stresses are recorded as a truck of known weight passes over the bridge, and at least one long-term test in which the number and magnitude of stress cycles are recorded under normal traffic. Data collected using the data acquisition system can be used to estimate remaining fatigue life and set inspection intervals. The recommended procedure for estimating remaining fatigue life follows NCHRP Report 299, taking full advantage of the fact that stresses are measured rather than computed. The procedure for setting inspection intervals is based on a fracture mechanics estimate of the time required for a crack of an assumed initial length to grow to a critical length when driven by the measured stress cycles.
Format:

PDF
Funding:

2196
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:cb8c6a752e380d02a999b6fbea136293a3ed3331f93c52bfc9ef9a15bfe4db5844584d5c6befd17ba7630a524a10de8b552f464c23df0df2437df45fa423ee98
Download URL:

https://rosap.ntl.bts.gov/view/dot/87935/dot_87935_DS1.pdf
File Type:

[PDF - 6.24 MB ]

File Language:

English

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