State-of-the-art in structural health monitoring of large and complex civil infrastructures

Li, Hong‐Nan; Ren, Liang; Jia, Zhang; Yi, Ting‐Hua; Li, Dongsheng

doi:10.1007/s13349-015-0108-9

Cited by 209 publications

(96 citation statements)

References 28 publications

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“…They can also provide engineers with valuable data for asset management plans and bridge service life studies. Structural health monitoring (SHM) systems have been widely applied for use in bridge condition evaluation . However, the application of these systems in cold regions is lacking, and very few quantitative studies have examined the temperature behavior of large‐scale bridges .…”

Section: Introductionmentioning

confidence: 99%

Fiber optic health monitoring and temperature behavior of bridge in cold region

Xiao

Hulsey

Balasubramanian³

2017

Struct Control Health Monit

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Summary The objectives of this research are (a) to establish a structural health monitoring system for bridge safety evaluation that is suitable for cold, remote regions and (b) to identify the bridge responses under variations in temperature. To achieve this, fiber optic sensors with temperature compensation were selected that were suitable for cold regions. This technique allows monitoring equipment to operate far from the sensor installation site, which avoids exposing much of the equipment to extremely cold temperatures and makes a power supply more accessible. The bridge temperature behavior is studied based on the real‐time field measurement data, and the relationship between the thermal loading and the bridge response is presented.

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Section: Introductionmentioning

confidence: 99%

Fiber optic health monitoring and temperature behavior of bridge in cold region

Xiao

Hulsey

Balasubramanian³

2017

Struct Control Health Monit

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“…Natural frequencies and vibration modes are essential dynamic characteristics of a structure, which have been widely used in structural health monitoring or damage detection . A variety of modal analysis and extraction methods have been proposed in the past decades .…”

Section: Introductionmentioning

confidence: 99%

Mode localization characteristics of damaged quasiperiodically supported beam structures with local weak coupling

Ying

Kang

2019

Struct Control Health Monit

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KEYWORDS frequency loci veering, local weak coupling, mode localization, quasiperiodically supported beam, support damage 1 | INTRODUCTION Natural frequencies and vibration modes are essential dynamic characteristics of a structure, which have been widely used in structural health monitoring or damage detection. 1-11 A variety of modal analysis and extraction methods have been proposed in the past decades. [12][13][14][15][16][17][18][19] The extracted low-order vibration modes from a complex structure in general have higher accuracy than high-order vibration modes. However, structural high-order vibration modes are more sensitive to local damage than low-order modes, and thus the reliability of modal-based damage detection is influenced by the sensitivity and accuracy of extracted modal properties. The use of low-order vibration modes such as the fundamental mode is a more effective method for structural damage detection.Many engineering structures have geometric and physical periodicity, for example, continuous girder viaducts and bridges with periodically spaced supports (supports are equally spaced and have identical stiffness). The dynamic characteristics of periodic structures have been studied extensively. [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] The periodically supported beam consists of multiple spans, and the adjacent spans share the same displacement and angular rotation at the joint support due to continuity. For small support stiffness, the continuity of displacement and angular rotation indicates a strong coupling of the periodically supported beam between adjacent spans. On the contrary, for large support stiffness, the support displacement of the beam, for example, in the fundamental vibration mode is close to zero, and then the beam between spans has coupling only in angular rotation, which is the so-called local weak coupling. The periodically supported beam is a local weak coupling beam when the support stiffness is higher than a certain value. 39,40 Nevertheless, the periodically supported beam with local weak coupling leads to a quasiperiodically supported beam if the stiffness in one or a few supports is weakened due to damage. When the support stiffness is lowered to be smaller than a critical value, the fundamental natural frequency of the quasiperiodically supported beam manifests frequency loci veering, and its fundamental vibration mode exhibits modal jump. The modal jump yields a noticeable increase of absolute displacement of the fundamental vibration mode around the stiffness-reduced support, which is the so-called mode localization. 40 The dynamic characteristics such as fundamental mode localization of the quasiperiodically supported beam with local weak coupling rely directly on the support stiffness, and the mode localization is around the stiffness-reduced support. These outstanding dynamic characteristics of quasiperiodically supported structures have the potential to be applied for detecting and locating support damage based on the fundamen...

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“…Fortunately, such issues have recently been addressed (Bennett et al, 2010;Tondini et al, 2015;Li et al, 2016) resulting to an increase in their deployment (Dikmen, 2016;Wang et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

System Identification of Tunnel Response to Ground Motion Considering a Simplified Model

Alonso‐Rodríguez

Nikitas

Knappett

et al. 2018

Front. Built Environ.

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This paper presents a simplified model using coupled Bernoulli and shear beams supported by Winkler-type springs for system identification of tunnels subjected to earthquake-induced ground motions. The model formulation is introduced and closed-form solutions to the modal characteristic equation and mode shapes are derived. The latter are verified against the results of numerical models. Then, the system identification algorithm is presented, showcasing its ability to recover model parameters when recorded acceleration time histories along the tunnel are compromised by noise and sensor locations are varied. The presented framework can be used to initially and, simply, recover tunnel response when monitoring data is available, or to plan for monitoring campaigns in newly constructed or existing tunnels.

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State-of-the-art in structural health monitoring of large and complex civil infrastructures

Cited by 209 publications

References 28 publications

Fiber optic health monitoring and temperature behavior of bridge in cold region

Fiber optic health monitoring and temperature behavior of bridge in cold region

Mode localization characteristics of damaged quasiperiodically supported beam structures with local weak coupling

System Identification of Tunnel Response to Ground Motion Considering a Simplified Model

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