In-Service Monitoring of FRP Bridge in New York

Alampalli, Sreenivas; Yannotti, Arthur P.; O'Connor, Jerome; Norfolk, Mark; Schongar, G; Greenberg, H. S.

doi:10.1061/40492(2000)68

Cited by 5 publications

(6 citation statements)

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“…Therefore, each levitation magnet is allotted two degrees of freedom (vertical displacement and pitch displacement), which are represented by Equation (4). In a similar manner, two degrees of freedom (DOFs) and yaw displacement are allocated to each guiding magnet as indicated by Equation (5).…”

Section: Establishment Of the Maglev Train Modelmentioning

confidence: 99%

“…The displacement vectors, as described in Equations ( 7)- (11), are determined based on the degrees of freedom (DOFs) of the train components, as specified in Equations ( 1)- (5).…”

Section: Equations Of Motion For Maglev Train Vehiclesmentioning

confidence: 99%

“…Bridge decks, on the other hand, have drawn attention recently because of their inherent benefits in terms of strength and stiffness per unit weight above conventional reinforced concrete decks. This approach has been successfully used by some transportation organizations to restore a number of short-span truss bridges [5].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Response Analysis of a Fiber-Reinforced Polymer Reinforced Viaduct under Full Scale Moving Maglev Train Load

Chango,

Chen,

Han

2023

Buildings

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Fiber-reinforced polymers (FRPs) are widely utilized in the construction of bridges all over the world and are thought to be a potential alternative to steel reinforcement, particularly in concrete structures exposed to harsh conditions or the effects of electromagnetic fields. Although some FRP bridges have already been put into service and others are still being built, there is ongoing discussion in the civil engineering community over the efficacy of FRPs in substituting steel in vibration-prone bridge parts. This study adopts finite element modeling based on numerical and analytical approaches to investigate the dynamic behavior of the viaduct during maglev train operation when the steel-reinforced girder concrete is replaced by FRP-reinforced girder concrete. In this way, a realistic coupled maglev train–viaduct system is developed and validated by comparative analysis with data from field experiments. Then, an investigation of the viaduct dynamic behavior when the girder is reinforced with polyacrylic nitrile carbon FRP or S-glass FRP reveals that system displacement is governed by viaduct stiffness, whereas acceleration is governed by structure weight. Nonetheless, the dynamic load frequency has a considerable impact on the efficacy of FRP as viaduct concrete reinforcement, which has been demonstrated to be effective at particular train speeds dependent on the structure’s natural frequency.

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Section: Establishment Of the Maglev Train Modelmentioning

confidence: 99%

“…The displacement vectors, as described in Equations ( 7)- (11), are determined based on the degrees of freedom (DOFs) of the train components, as specified in Equations ( 1)- (5).…”

Section: Equations Of Motion For Maglev Train Vehiclesmentioning

confidence: 99%

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Dynamic Response Analysis of a Fiber-Reinforced Polymer Reinforced Viaduct under Full Scale Moving Maglev Train Load

Chango,

Chen,

Han

2023

Buildings

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“…Short-term static and dynamics tests of composite footbridges have been recently presented in references [21,22]. Full SHM systems of composite bridges are shown in references [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Short and Long Term Measurements in Assessment of FRP Composite Footbridge Behavior

2020

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The paper presents application of different sensors for the purpose of short and long term measurements, as well as a structural health monitoring (SHM) system to assess the behavior of a novel fiber reinforced plastics (FRP) composite footbridge. The aim is to present a thorough and concise description of these sensors networks and results gathered with their aid during in situ measurement of strains, displacements, and vibrations, as only a few works are available in this field. The bridge geometry, material solutions, and properties are described at first. Then the measurement devices composing the system and subsystems of sensors are elaborated on. Subsequently, the bridge research program is described and the results are shown and discussed. Finally, it is concluded that the use of selected sensors is helpful in assessment of the behavior of the novel structure, and moreover in validation of its numerical models. The collected data confirmed many assumptions made during the bridge design process and allowed us to accept it for exploitation.

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“…Testing related to the field performance of FRP materials has also been undertaken by researchers. Alampalli et al (2000) performed a load test on the first FRP bridge to be constructed in New York State. Load tests, six month routine visual inspections and a finite element analysis are used for monitoring the performance level of the structure.…”

Section: Introductionmentioning

confidence: 99%

Experimental characterization and diagnostics of the early‐age behavior of a semi‐integral abutment FRP deck bridge

et al. 2012

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Purpose -The purpose of this paper is to further validate a wireless sensor system developed at Clarkson University for structural monitoring of highway bridges. The particular bridge monitored employs a fiber reinforced polymer (FRP) panel system which is fairly innovative in the field of civil engineering design. The superstructure was monitored on two separate occasions to determine a change in structural response and see how the structural system performs over time. Design/methodology/approach -A series of wireless sensor units was deployed at various locations of the steel superstructure, to measure both the modal response from acceleration measurements as well as quasi-static and dynamic strain response. Ambient and forced loading conditions were applied to measure the response. Data results were compared over two separate periods approximately nine months apart. Findings -The first eight mode shapes were produced from output-only system identification providing natural frequencies ranging from approximately 6 to 42 Hz. The strain response was monitored over two different testing periods to measure various performance characteristics. Neutral axis, distribution factor, impact factor and end fixity were determined. Results appeared to be different over the two testing periods. They indicate that the load rating of the superstructure decreased over the nine month period, possibly due to deterioration of the materials or composite action. Research limitations/implications -The results from the two testing periods indicate that further testing needs to be completed to validate the change in response. It is difficult to say with certainty that the significant change in response is due to bridge deterioration and not other factors such as temperature effects on load rating. The sensor system, however, proved to provide high quality data and responses indicating its successful deployment for load testing and monitoring of highway infrastructure. Originality/value -The paper provides a depiction of the change in structural behavior of a bridge superstructure using a wireless sensor system. The wireless system provided high-rate data transmission in real time. Load testing at two different points in time, eight months apart, showed a significant change in bridge behavior. The paper provides a practical and actual physical load test and rating during these two periods for quantifiable change in response. It is shown that the wireless system is capable of infrastructure monitoring and that possible deterioration is expected with this particular bridge design. Additionally, the load testing occurred during different seasons, which could create cause for temperature effects in load rating. This can provide a basis for future performance monitoring techniques and structural health monitoring.

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In-Service Monitoring of FRP Bridge in New York

Cited by 5 publications

References 0 publications

Dynamic Response Analysis of a Fiber-Reinforced Polymer Reinforced Viaduct under Full Scale Moving Maglev Train Load

Dynamic Response Analysis of a Fiber-Reinforced Polymer Reinforced Viaduct under Full Scale Moving Maglev Train Load

Short and Long Term Measurements in Assessment of FRP Composite Footbridge Behavior

Experimental characterization and diagnostics of the early‐age behavior of a semi‐integral abutment FRP deck bridge

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