Details:

Creators:
Mahmoud, Khaled M.
Corporate Creators:
Bridge Technology Consulting
Corporate Contributors:
New York (State). Dept. of Transportation ; United States. Federal Highway Administration
New York (State). Dept. of Transportation ; United States. Federal Highway Administration Less -
Subject/TRT Terms:
[+]
Bridge Cables Service Life
Publication/ Report Number:
C-07-11
Resource Type:
Tech Report
Geographical Coverage:
New York
Corporate Publisher:
New York (State). Dept. of Transportation
Abstract:
"This report presents the BTC method; a comprehensive state-of-the-art methodology for evaluation of remaining

strength and residual life of bridge cables. The BTC method is a probability-based, proprietary, patented, and peerreviewed

methodology, which applies to parallel and helical; either zinc-coated or bright wire of suspension and cablestayed

bridge cables. The BTC method includes random sampling without regard to wire appearance, mechanical

testing of wires, determining the probability of broken and cracked wires, evaluating ultimate strength of cracked wires

employing fracture mechanics principles and utilizing the above data to assess remaining strength in each investigated

length of the cable. The probabilistic-based BTC method forecasts remaining service life of the cable by determining

the rate of growth in broken and cracked wires proportions detected over a time frame, measuring the rate of change of

fracture toughness over same time frame, and applying the rates of change to a strength degradation prediction model.

The BTC method provides sensitivity analysis to identify the key inputs, which influence the estimated cable strength

and assist decision-making process. The report describes the application of BTC method at Mid-Hudson Bridge in

Highland, New York, conducted by Bridge Technology Consulting (BTC), under a joint contract with New York State

Department of Transportation (NYSDOT) and New York State Bridge Authority (NYSBA). This project is funded in

part with funds from the Federal Highway Administration (FHWA). The BTC method has been peer-reviewed by

MTA Bridges & Tunnels, NYSDOT and NYSBA. To date, the BTC method has been applied to evaluate cable

strength at the Bronx-Whitestone Bridge and Mid-Hudson Bridge, in the state of New York, USA."


Format:
PDF
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:e9ed7c2d50beef8ced650251c3a39fdbdfdd1ba9b29c3fa50c08acd2776d957a
Download URL:
https://rosap.ntl.bts.gov/view/dot/23849/dot_23849_DS1.pdf
File Type:

Supporting Files

• No Additional Files

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