Civil Engineering Reference
In-Depth Information
with the temperature. Moreover, the traffic also has an impact on the performance of the bridge; the modal frequencies tend
to decrease as the traffic loads increase. In addition, the longitudinal movement of the orthotropic steel box girder is found to
behave linearly with temperature. Future work is exploring modal information collected more frequently during the day
(e.g., every hour) to verify the identified reduction in modal frequencies due to traffic loads.
Acknowledgments
The authors would like to gratefully acknowledge the generous support offered by the U.S. Department of Commerce,
National Institute of Standards and Technology (NIST) Technology Innovation Program (TIP) under Cooperative Agreement Number
70NANB9H9008. Additional support was provided by the University of Michigan and the California Department of Transportation(Caltrans).
Support and guidance in the use of SenStore provided by Gwen van der Linden (SC Solutions) and Professor Atul Prakash (University of
Michigan) are greatly appreciated. On site assistance with sensor installation on the New Carquinez Bridge by Caltran personnel, especially
Mr. Edward Thometz, are also greatly appreciated.
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