Abstract
Based on a simple vehicle-bridge interaction model, we analytically found out that the vehicle acceleration contains the damage information, which can be represented by the instantaneous stiffness Z as follows: (1) where yB is the deflection of bridge, F is the tapping force; v is the vehicle speed; M is the mass of vehicle and the third term is the constant acceleration due to dead load. From equation (1), it was easy to carry out the sensitivity analysis. From the above analyses, the tap-scan damage detection method was proposed under the framework of statistical pattern recognition. Numerical and experimental examples demonstrated that this method has the potential of successfully detecting the damage without the requirement of the finger-print of the intact structure, the pre-installing of sensors on structures, nor the traffic blocking. keywordTap-scan method; Damage detection; Vehicle-bridge interaction
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