A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Damage Detection of Bridges Using the Contact‐Point Response
This chapter first derives the moving vehicle's contact‐point response (acceleration) both analytically and in central‐difference form for field use. Central to the damage detection is the calculation of the instantaneous amplitude squared (IAS) for the low‐frequency driving component of the contact‐point response by the Hilbert transform, making use of its narrow‐band feature. In the finite element simulation, a damage (crack) is modeled by a hinge‐spring unit. Using the IAS peaks, it is demonstrated that the location and severity of a damage or damages of the bridge can be clearly identified. Also, a parametric study is conducted for the effects of the key factors, such as surface roughness, vehicle speed, measurement noise and random traffic, on damage detection. In the presence of ongoing traffic, the damages of the bridge are identified from the repeated IAS peaks generated for different traffic flows by the same test vehicle over the bridge.
Damage Detection of Bridges Using the Contact‐Point Response
This chapter first derives the moving vehicle's contact‐point response (acceleration) both analytically and in central‐difference form for field use. Central to the damage detection is the calculation of the instantaneous amplitude squared (IAS) for the low‐frequency driving component of the contact‐point response by the Hilbert transform, making use of its narrow‐band feature. In the finite element simulation, a damage (crack) is modeled by a hinge‐spring unit. Using the IAS peaks, it is demonstrated that the location and severity of a damage or damages of the bridge can be clearly identified. Also, a parametric study is conducted for the effects of the key factors, such as surface roughness, vehicle speed, measurement noise and random traffic, on damage detection. In the presence of ongoing traffic, the damages of the bridge are identified from the repeated IAS peaks generated for different traffic flows by the same test vehicle over the bridge.
Damage Detection of Bridges Using the Contact‐Point Response
Yang, Yeong‐Bin (author) / Yang, Judy P. (author) / Zhang, Bin (author) / Wu, Yuntian (author)
Vehicle Scanning Method for Bridges ; 217-235
2019-10-28
19 pages
Article/Chapter (Book)
Electronic Resource
English
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