Multi-Scale Finite Element Model Development for Long-Term Condition Assessment of Vertical Lift Bridge

Mashayekhizadeh, Maryam; Mehrkash, Milad; Shahsavari, Vahid; Santini‐Bell, Erin

doi:10.1061/9780784481332.008

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…The short term approach mainly aimed to provide bridge operators with information related to environmental conditions, specifically wind speed, and their impact on the vertical lift operation. The long term goals for this SHM system are (1) monitoring the dynamic performance of both the horizontal span and the lift tower of the instrumented portion of the Memorial Bridge (see Figure 1), (2) the strain distribution through the gusset-less connection for design verification and fatigue performance assessment, including the fracture-critical radiused weld connecting the web and flange on the bottom chord and (3) monitoring of the impact of corrosion overtime on load-carrying capacity given the harsh coastal environment and that the structural deficiency due to material loss caused the closure of the original Memorial Bridge in 2012 (Mashayekhi et al, 2018).…”

Section: Design Of Structural Health Monitoring Systemmentioning

confidence: 99%

“…A well-detailed global model of the case study bridge (see Figure 6A), at which all members were modeled with higherscale elements (shell element), was initially developed and used as a baseline for the development of efficient multi-scale models (Mashayekhi et al, 2018). The shell element model was considered as the baseline to understand the structural performance of the members which can be conveniently modeled with lower scale beam elements without a significant decrease in accuracy.…”

Section: Long Term Monitoring Program and Associated Structural Modelsmentioning

confidence: 99%

“…Similar beam and shell elements as those used in aforementioned models were applied in this model. The coupling between two different dimensions of the elements at the interface point of the beam and shell elements were provided using the multi-point constraint equations (McCune et al, 2000;Mashayekhi et al, 2018).…”

Section: Long Term Monitoring Program and Associated Structural Modelsmentioning

confidence: 99%

See 2 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.

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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.

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Section: Design Of Structural Health Monitoring Systemmentioning

confidence: 99%

Section: Long Term Monitoring Program and Associated Structural Modelsmentioning

confidence: 99%

Section: Long Term Monitoring Program and Associated Structural Modelsmentioning

confidence: 99%

See 1 more Smart Citation

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

Shahsavari

Mashayekhi

Mehrkash

et al. 2019

Front. Built Environ.

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“…A simplified global FE model consisting only of beam elements, the B‐model, is developed in SAP2000®, as shown in Figure (Mashayekhizadeh, Mehrkash, Shahsavari, & Santini‐Bell, ). This model is unable to consider the features of the gusset‐less connection.…”

Section: Finite Element Model Categoriesmentioning

confidence: 99%

Three‐dimensional multiscale finite element models for in‐service performance assessment of bridges

Mashayekhi

Santini‐Bell

2018

Computer aided Civil Eng

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Accurate representation of the structural performance of civil engineering structures, specifically complex bridge structures, may be achieved through an efficient multiscale finite element (FE) model. Multiscale FE modeling couples multiple dimensions of elements in a single model. In this study, the selected existing multipoint constraint equations applied in planar coupling conditions are modified and refined for out-of-plane coupling conditions in a single three-dimensional FE model. Also, the optimum location for the interface points of different elements is determined to improve the model's accuracy and efficiency. The present case study, the Memorial Bridge in Portsmouth, NH, is a vertical lift bridge, which includes novel gusset-less connections. These connections have complex geometries and therefore require finer dimension elements to represent the structural behavior, while the remainder of the structure is modeled with coarser dimension elements. To achieve an accurate and efficient multiscale model of the Memorial Bridge, multiple global FE models are developed and the predicted structural responses are verified with respect to the fieldcollected structural responses of the bridge.

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Fatigue assessment of a complex welded steel bridge connection utilizing a three-dimensional multi-scale finite element model and hotspot stress method

Mashayekhi

Santini‐Bell

2020

Engineering Structures

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Multi-Scale Finite Element Model Development for Long-Term Condition Assessment of Vertical Lift Bridge

Cited by 3 publications

References 10 publications

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

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

Three‐dimensional multiscale finite element models for in‐service performance assessment of bridges

Fatigue assessment of a complex welded steel bridge connection utilizing a three-dimensional multi-scale finite element model and hotspot stress method

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