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BWIM Using Measured Acceleration and Strain Data  

Paik, In-Yeol (Dept. of Civil & Environmental Eng., Kyungwon University)
Lee, Seon-Dng (ESCO C&S)
Shin, Soo-Bong (Dept. of Civil Eng., Inha University)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.31, no.3, 2011 , pp. 233-245 More about this Journal
Abstract
A new BWIM(bridge weigh-in-motion) algorithm using both measured strain and acceleration data is proposed. To consider the effects of bridge vibration on the estimation of moving loads, the dynamic governing equation is applied with the known stiffness and mass properties but damping is ignored. Dynamic displacements are computed indirectly from the measured strains using the beam theory and accelerations are measured directly by accelerometers. To convert a unit moving load to its equivalent nodal force, a transformation matrix is determined. The incompleteness in the measured responses is considered in developing the algorithm. To examine the proposed BWIM algorithm, simulation studies, laboratory experiments and field tests were carried. In the simulation study, effects of measurement noise and estimation error in the vehicle speed on the results were investigated.
Keywords
BWIM; Strain and Acceleration; Vibration Effects; Transformation Matrix; Error Analysis;
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Times Cited By KSCI : 2  (Citation Analysis)
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