Vibration, control and monitoring of long-span bridges—recent research, developments and practice in Japan

Fujino, Yozo

doi:10.1016/s0143-974x(01)00049-9

Cited by 115 publications

(43 citation statements)

References 18 publications

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“…There have been examples around the world utilizing SHM data for condition assessment and design improvement of bridges. [8][9][10][11][12][13][14] Typical SHM system is usually composed of sensor system, data acquisition and transmission system, database system, and condition assessment system. [14] The sensor system consists of various sensors, which monitor both the environment and the bridge structure continuously.…”

Section: Introductionmentioning

confidence: 99%

Utilization of structural health monitoring in long-span bridges: Case studies

Sun

Zou

Zhang

2017

Struct. Control Health Monit.

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Summary Structural health monitoring (SHM) of bridges has gained rapid development in the past few years. This paper describes application of SHM on long‐span bridges in China, with the aim to illustrate its practical value. A short review of its development and practice is firstly introduced. Three case studies are subsequently presented on utilization of SHM data in engineering practice. In the first case study, a ship collision incident is analyzed using SHM data. An alarm is sent and confirmed when the collision occurred, and mode parameters are identified with GPS measurements to evaluate the bridge condition. In the second case study, damage of expansion joints in a suspension bridge is assessed with girder end displacement measurements. Malfunction of viscous damper is found to correlate with cumulative displacement. The results show that cumulative displacement can be used for condition assessment of expansion joints. In the third case study, the performance of tuned mass dampers is evaluated with wind and vibration measurements before and after tuned mass damper installation. Through explanation of these case studies, the paper illustrates how to distill useful insights from SHM data, which could be instructive for further research in this field.

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Section: Introductionmentioning

confidence: 99%

Utilization of structural health monitoring in long-span bridges: Case studies

Sun

Zou

Zhang

2017

Struct. Control Health Monit.

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“…A very special group of these requirements is a group called vibrational (dynamical) comfort [3,4]. It contains a set of parameters, which make it possible to keep a structure in a dynamical regime that will not cause a physical and mental discomfort in the users.…”

Section: Introductionmentioning

confidence: 99%

Bridges for Pedestrians with Random Parameters using the Stochastic Finite Elements Analysis

Szafran¹,

Kamiński²

2017

International Journal of Applied Mechanics and Engineering

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The main aim of this paper is to present a Stochastic Finite Element Method analysis with reference to principal design parameters of bridges for pedestrians: eigenfrequency and deflection of bridge span. They are considered with respect to random thickness of plates in boxed-section bridge platform, Young modulus of structural steel and static load resulting from crowd of pedestrians. The influence of the quality of the numerical model in the context of traditional FEM is shown also on the example of a simple steel shield. Steel structures with random parameters are discretized in exactly the same way as for the needs of traditional Finite Element Method. Its probabilistic version is provided thanks to the Response Function Method, where several numerical tests with random parameter values varying around its mean value enable the determination of the structural response and, thanks to the Least Squares Method, its final probabilistic moments.

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“…However, from a structural dynamics point of view, long span CSBs exhibit fl exible and complex behavior where the vertical, lateral, and torsional motions are often strongly coupled, which raises many concerns about their behavior under environmental dynamic loads such as wind and earthquakes (Fujino, 2002;Ganev et al, 1998). The multiple-support problem begins when the bridge is long with regard to the wave-lengths of the input motion in the frequency range of importance to its earthquake response.…”

Section: Introductionmentioning

confidence: 99%

Ground motion spatial variability effects on seismic response control of cable-stayed bridges

Raheem

Hayashikawa

Dorka

2011

Earthq. Eng. Eng. Vib.

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The spatial variability of input ground motion at supporting foundations plays a key role in the structural response of cable-stayed bridges (CSBs); therefore, spatial variation effects should be included in the analysis and design of effective vibration control systems. The control of CSBs represents a challenging and unique problem, with many complexities in modeling, control design and implementation, since the control system should be designed not only to mitigate the dynamic component of the structural response but also to counteract the effects of the pseudo-static component of the response. The spatial variability effects on the feasibility and effi ciency of seismic control systems for the vibration control of CSBs are investigated in this paper. The assumption of uniform earthquake motion along the entire bridge may result in quantitative and qualitative differences in seismic response as compared with those produced by uniform motion at all supports. A systematic comparison of passive and active system performance in reducing the structural responses is performed, focusing on the effect of the spatially varying earthquake ground motion on the seismic response of a benchmark CSB model with different control strategies, and demonstrates the importance of accounting for the spatial variability of excitations.

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Vibration, control and monitoring of long-span bridges—recent research, developments and practice in Japan

Cited by 115 publications

References 18 publications

Utilization of structural health monitoring in long-span bridges: Case studies

Utilization of structural health monitoring in long-span bridges: Case studies

Bridges for Pedestrians with Random Parameters using the Stochastic Finite Elements Analysis

Ground motion spatial variability effects on seismic response control of cable-stayed bridges

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