Details:

Creators:
Islam, AKM Anwarul ; Li, Frank ; Hamid, Hiwa ; Jaroo, Amer
Islam, AKM Anwarul ; Li, Frank ; Hamid, Hiwa ; Jaroo, Amer Less -
Corporate Creators:
Youngstown State University
Corporate Contributors:
United States. Federal Highway Administration
Subject/TRT Terms:
[+]
Box Beams Condition Surveys Finite Element Method Load Factor Prestressed Concrete Bridges Sensors Service Life Structural Health Monitoring Vibration
Publication/ Report Number:
FHWA/OH-2014/7
Resource Type:
Tech Report
Geographical Coverage:
Ohio
Corporate Publisher:
Ohio. Dept. of Transportation. Office of Statewide Planning and Research
Abstract:
This report describes a method for the overall condition assessment and load rating of prestressed box beam

(PSBB) bridges based on their dynamic response collected through wireless sensor networks (WSNs). Due to a

large inventory of deficient and aging bridges in the United States, the health monitoring of bridges can be very

expensive; therefore, new tools for quick, efficient and response-based condition assessment and load rating of

bridges will be helpful. The hypothesis is based on the assumption that the health of a bridge is associated with

its vibration signatures under vehicular loads. Two WSNs were deployed on a 25-year old PSBB bridge under

trucks with variable loads and speeds, and its dynamic response was collected at the current condition. The

acceleration response of the bridge at its newest condition was collected from dynamic simulations of its full-scale finite element analysis (FEA) models mimicking field conditions. The FEA bridge model was validated by

the field testing and numerical analysis. The acceleration data in time domain were transformed into frequency

domain using Fast Fourier Transform to determine peak amplitudes and corresponding fundamental

frequencies for the newest and current conditions. The analyses and comparisons of the bridge dynamic

response between the newest and the current bridge interestingly indicate a 37% reduction in its fundamental

frequency over 25 years of service life. This frequency reduction is linked to the reduction in condition rating of

the current bridge. The analysis data, bridge structural dynamics and bridge geometric parameters have been

used to calculate the in-service stiffness of the bridge to estimate its load bearing capacity. Using the results

and algorithms from this research, application software is developed to instantly estimate the overall condition

rating and load bearing capacity of a PSBB bridge under vehicular loads. The research outcome and the

software will help in performing quick and cost-effective condition assessment and load rating of PSBB bridges,

and may provide a better ability to plan replacements and develop load ratings.


Format:
PDF
Funding:
SJN 134695
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:e2a96e58d6540c21ac621b043c17474ad27b5d7ed4823d74e10e7e2b2dca928f
Download URL:
https://rosap.ntl.bts.gov/view/dot/27869/dot_27869_DS1.pdf
File Type:

Supporting Files

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