Structural Health Monitoring of a Vertical Lift Bridge Using Vibration Data

Shahsavari, Vahid; Mehrkash, Milad; Bell, Erin Santini

doi:10.32548/rs.2018.027

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To extend the application of wavelets for damage assessment of bridge structures, Sun and Chang (2002) used the wavelet packet component energies obtained from a three-span continuous bridge as inputs into neural networks. Shahsavari et al (2018a) reported a combined application of the WPT and statistical control chart analysis to quantify the change in a bridge system response based on the average normalized energy stored in the wavelet packets. This case study presents an operational decision-making criterion based on the procedure of Shahsavari et al (2018a) to enhance the discrimination of wavelet features between two different states of a bridge.…”

Section: Literature Surveymentioning

confidence: 99%

“…Shahsavari et al (2018a) reported a combined application of the WPT and statistical control chart analysis to quantify the change in a bridge system response based on the average normalized energy stored in the wavelet packets. This case study presents an operational decision-making criterion based on the procedure of Shahsavari et al (2018a) to enhance the discrimination of wavelet features between two different states of a bridge. The wavelet indices extracted from a calibrated model of an instrumented bridge are used to study the applicability of the proposed approach to damage detection problem studies under progressive damage scenarios.…”

Section: Literature Surveymentioning

confidence: 99%

“…The simulated lift impact vibrates the fixed-span of the verified SAP2000 R model so that the resulting accelerations can be collected under varying health and damage scenarios. The principal concept behind the excitation technique is explained in detail by Shahsavari et al (2018a).…”

Section: Real-time Condition Assessment For Operational Decision-makimentioning

confidence: 99%

“…A damage detection criterion relying on the wavelet energy rate index of acceleration signals was proposed to continuously post-process the bridge collected dynamic data as a means for real-time condition assessment. The damage detection procedure of Shahsavari et al (2018a) was employed to discriminate between two different states of the structure using the collected acceleration data obtained from the SAP2000 R model at pseudosensor (accelerometer) locations throughout the bridge model. For each structural condition, the bridge was subjected to multiple random excitations to simulate the frequent and dynamic impacts of the bridge movable (lift) span on the fixedspan and tower.…”

Section: Real-time Condition Assessment For Operational Decision-makimentioning

confidence: 99%

See 3 more Smart Citations

Diagnostic Testing of a Vertical Lift Truss Bridge for Model Verification and Decision-Making Support

Shahsavari

Mashayekhi

Mehrkash

et al. 2019

Front. Built Environ.

Self Cite

View full text Add to dashboard Cite

A practical long term structural health monitoring program must be based on reasonable field capabilities, the needs of the bridge owner, and the anticipated structural behavior unique to the structure. Each sensor installed as part of the monitoring program should provide information directly in response to operational needs related to the structure's short term and long term performance. A thoughtfully considered instrumentation plan developed in cooperation with the bridge designer, bridge manager, bridge maintenance operator and academic researchers will provide data to enhance both the state of the practice and state of the art for the bridge structural design, management and maintenance. Monitoring a bridge's structural response has the potential to (a) detect the presence of structural changes for condition assessment, (b) inform the bridge manger to assist in daily operational decision-making and (c) validate the structural design assumptions and (d) refine a structural model of the bridge to be used for performance prediction. The excitation for these responses typically comes from traffic or environmental demands. Vertical lift bridges provide a unique opportunity for structural health monitoring based on the dynamic response due to the frequent and repeated impact imparted on the structure each time the lift span opens and closes. In this paper, a structural health monitoring system designed to provide valuable information for design verification, structural model calibration, fatigue monitoring, and operational decision-making support for the reconstructed Memorial Bridge carrying US Route 1 between Portsmouth, New Hampshire and Kittery, Maine. This paper will detail the development of the sensor layout including input from stakeholders, accessibility issues and complementary and contradicting objectives. A set of structural models with varying degrees on complexity were created based on the structural performance objectives. The data collected during a pseudo-static truck load test was used to calibrate the structural models of the bridge and to select the appropriate model for each post-processing and decision-making tools related to structural performance.

show abstract

Section: Literature Surveymentioning

confidence: 99%

Section: Literature Surveymentioning

confidence: 99%

Section: Real-time Condition Assessment For Operational Decision-makimentioning

confidence: 99%

Section: Real-time Condition Assessment For Operational Decision-makimentioning

confidence: 99%

See 2 more Smart Citations