Intelligent bridges - Adaptive systems for information and holistic evaluation in real time

Neumann, Thorsten; Haardt, Peter

doi:10.1201/b12352-532

Cited by 3 publications

(5 citation statements)

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“…The key idea of the presented approach is to generate a system model which takes into account dependencies of structural components as well as interactions between deterioration mechanisms. It is important to avoid "blackbox" systems in order to obtain a better understanding of deterioration processes and their interactions (Neumann and Haardt 2012). The developed system model is able to identify causes of damage and to determine the relevance of the damage as well as their impact on individual bridge components as well as the entire bridge system.…”

Section: The System Model Approachmentioning

confidence: 99%

An application of the local flexibility method to hyper-static beams using non-local virtual forces

Hsu¹,

Shiao²,

Loh³

2013

Research and Applications in Structural Engineering, Mechanics and Computation

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In current bridge maintenance practice, condition grades are assigned to individual bridges, based on regularly performed inspections. One of the main limitations to this approach is the subjective nature of grade assignment. To overcome this drawback, major bridge authorities are developing new methods for condition assessment based on collecting and evaluating sensor data. A major challenge in this context is to correctly model the impact of local deteriorations on the entire bridge's state. In this research, a system model-based approach has been developed to accurately model the correlations between the deterioration mechanisms and the measurement values indicating the progress of the deterioration. In addition, the system model describes the impact of the condition of individual bridge components on the condition of the overall bridge system. To this end, the bridge is hierarchically decomposed into modules, components and subcomponents, taking the structural system and mutual dependencies into account. The system model consists of three levels: The lowest level provides elements for modelling the input parameters provided by sensors or manual measurements. The mid-level models the deterioration mechanisms, taking the output of the parameter level into account. The topmost level models the structure of the bridge in a hierarchical manner, starting at the element parts up to the complete bridge system. The bridge´s condition is determined by state propagation mechanisms on the basis of logical elements connecting the aforementioned elements. In the end, the system model can be used to simulate the propagation of conditions assignments from the leaves (the sensors) to the top (the entire bridge). The developed system model approach is based on the application of the Systems Modelling Language (SysML). The paper will discuss in detail the advantages and limitations of the developed method and present a number of ostensive examples.

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Section: The System Model Approachmentioning

confidence: 99%

An application of the local flexibility method to hyper-static beams using non-local virtual forces

Hsu¹,

Shiao²,

Loh³

2013

Research and Applications in Structural Engineering, Mechanics and Computation

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“…Within the road network the percentage of steel bridges is much smaller and stands actually at 5%. percent per bridge type, only steel and reinforced bridges displayed) and the road network (right, percent overall per bridge deck area) [1,8] The age distribution of railway bridges is shown in Figure 2 on the left side. Here, the ageing portfolio of bridges is apparent.…”

Section: Initial Situationmentioning

confidence: 99%

“…Figure 2. Age distribution of different bridge types for the railway network (left, percent per bridge type, only steel and reinforced bridges displayed) and the road network (right, percent overall per bridge deck area)[1,8] …”

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confidence: 99%

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New And Existing Bridge Constructions - Increase of Fatigue Strength of Welded Joints by High Frequency Mechanical Impact Treatment

Ummenhofer¹,

Weidner²,

Zinke³

2013

Romanian Journal of Transport Infrastructure

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Numerous studies at KIT prove that high frequency mechanical impact (HFMI) treatment is an efficient method for increasing the fatigue strength of welded steel structures. Within different research projects it was found that HFMI-methods can be used successfully for new and existing structures in order to extend the fatigue life. This paper gives an overview of the current status of existing steel bridges in Germany regarding aspects like bridge age distributions and traffic loads. Based on that overview welded joints susceptible to fatigue failure are identified. Using component-like small scale specimens, HFMI-methods were investigated within the objective of implementing an effective application for new and existing structures. Applying the fatigue test data observed, existing design proposals are evaluated and design recommendations for HFMI-treated joints are given. As a result of the research work, a transfer into practice has been realized and different applications are illustrated using the example of bridge constructions made of steel.

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“…The key idea of the new approach is to generate a system model which takes into account dependencies of structural components as well as interactions between damage mechanisms. It is important to avoid "black-box" systems in order to obtain a better understanding of deterioration processes and their interactions (Neumann & Haardt 2012). The developed system model is able to identify causes of damage and to determine the criticality of damage as well as their impact on individual bridge components and on the bridge itself.…”

Section: The System Model Approachmentioning

confidence: 99%

A System Model for the Lifecycle Monitoring of Bridges

Dori¹,

Wild²,

Borrmann³

et al.

Proceedings of the Third International Conference on Soft Computing Technology in Civil, Structural and Environmental Engineeri

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Intelligent bridges - Adaptive systems for information and holistic evaluation in real time

Cited by 3 publications

References 0 publications

An application of the local flexibility method to hyper-static beams using non-local virtual forces

An application of the local flexibility method to hyper-static beams using non-local virtual forces

New And Existing Bridge Constructions - Increase of Fatigue Strength of Welded Joints by High Frequency Mechanical Impact Treatment

A System Model for the Lifecycle Monitoring of Bridges

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