Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Determination of Natural Frequencies of a Steel Railroad Bridge Using Onboard Sensors
This paper presents an analytical methodology and experimental validation of determining the natural frequencies of a railroad truss bridge from the sensors mounted on a train passing over the bridge. This approach is first verified analytically using a spring mass system moving over an Euler Bernoulli beam, where the natural frequency of the beam was obtained from the vibration acceleration of the moving sprung-mass system. Field experiment was performed on a 109-year-old Devon steel open deck through truss railroad bridge over Housatonic River between Stratford and Milford, in Connecticut, USA. Accelerometers were placed on several selected locations on the bridge as well as a couple of locations in a coach of the train. Acceleration of the train-bridge coupled system were collected using accelerometers placed on-board train when it was moving at different speeds over the bridge. The accelerometer record was then processed using fast Fourier transform (FFT) to identify a first few fundamental frequencies of the bridge. These frequency results have been verified with those obtained from the field test acceleration data collected using the accelerometers directly attached to the bridge as well as those from the finite element (FE) modelling of the bridge. This information will facilitate the bridge damage and deterioration detection using shift in natural frequencies over time.
Determination of Natural Frequencies of a Steel Railroad Bridge Using Onboard Sensors
This paper presents an analytical methodology and experimental validation of determining the natural frequencies of a railroad truss bridge from the sensors mounted on a train passing over the bridge. This approach is first verified analytically using a spring mass system moving over an Euler Bernoulli beam, where the natural frequency of the beam was obtained from the vibration acceleration of the moving sprung-mass system. Field experiment was performed on a 109-year-old Devon steel open deck through truss railroad bridge over Housatonic River between Stratford and Milford, in Connecticut, USA. Accelerometers were placed on several selected locations on the bridge as well as a couple of locations in a coach of the train. Acceleration of the train-bridge coupled system were collected using accelerometers placed on-board train when it was moving at different speeds over the bridge. The accelerometer record was then processed using fast Fourier transform (FFT) to identify a first few fundamental frequencies of the bridge. These frequency results have been verified with those obtained from the field test acceleration data collected using the accelerometers directly attached to the bridge as well as those from the finite element (FE) modelling of the bridge. This information will facilitate the bridge damage and deterioration detection using shift in natural frequencies over time.
Determination of Natural Frequencies of a Steel Railroad Bridge Using Onboard Sensors
Dhakal, Suvash (Autor:in) / Malla, Ramesh B. (Autor:in)
16th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments ; 2018 ; Cleveland, Ohio
Earth and Space 2018 ; 1034-1046
15.11.2018
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Railroad Bridge Condition Evaluation Using Onboard Systems
| Online Contents | 2016
Railroad Bridge Condition Evaluation Using Onboard Systems
| Online Contents | 2016
Railroad Bridge Condition Evaluation Using Onboard Systems
| British Library Online Contents | 2016