&lt;title&gt;Monitoring system of the Akashi Kaikyo Bridge and displacement measurement using GPS&lt;/title&gt;

Fujino, Yozo; Murata, Masanobu; Okano, Satoshi; Takeguchi, Masahiro

doi:10.1117/12.387814

Cited by 51 publications

(23 citation statements)

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“…Attempts have also been made to use GPS alone to monitor very long span suspension bridges due to the shortcomings of using an accelerometer to measure slow structural movement with a vibration frequency lower than 0.2 Hz [3][4][5][6]. For instance, the main span of the Humber Bridge in the UK is 1.410 km long and its first natural frequency in the vertical direction is around 0.116 Hz [7].…”

Section: Introductionmentioning

confidence: 99%

Detecting bridge dynamics with GPS and triaxial accelerometers

Meng

Dodson

Roberts

2007

Engineering Structures

206

117

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Section: Introductionmentioning

confidence: 99%

Detecting bridge dynamics with GPS and triaxial accelerometers

Meng

Dodson

Roberts

2007

Engineering Structures

206

117

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“…Take a simply supported beam under dynamic moving load for example, four samples are set for comparative analysis: (1) Higher calculation accuracy will be obtained when more sensors (or smaller sensor length) are set due to the fact that average strain from LGSSs is closer to actual strain if sensor length is relatively smaller. Based on the analysis, the relative errors of deflection at mid-span at time t = 0.814 s are 0.93%, 0.98%, 1.16% and 1.89% for samples (1) to (4), respectively. Obviously, this shows that the shorter the gauge length is, the higher the estimation accuracy is.…”

Section: Sensor Optimizationmentioning

confidence: 98%

“…In order to arrange this kind of sensor, the reference point is required, but it is difficult to find such reference point in real structures especially for long-span bridges and buildings. The global positioning system (GPS) is another direct method for measuring displacement and can be utilized in real structures [1]. Compared to flexural structures, the accuracy of GPS in a rigid structure which has relatively smaller deflection is still a concern.…”

Section: Introductionmentioning

confidence: 99%

An Indirect Method for Monitoring Dynamic Deflection of Beam-Like Structures Based on Strain Responses

Hong

Qin

et al. 2018

Applied Sciences

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An indirect method for monitoring dynamic deflection of beam-like structures using strain responses measured by long-gauge fiber Bragg grating (FBG) sensors is proposed in this paper. Firstly, a theoretical derivation shows that structural deflection is in direct and linear relationship to long-gauge strain. Meanwhile, the method is suitable for structures with different boundary conditions and irrelevant to external loads. Secondly, the influence of boundary conditions, load type and sensor gauge length on the method is investigated by numerical simulation. Finally, an experiment of a simply supported beam subjected to dynamic loads was designed to verify the method. Experimental results show that both deflection time-history of arbitrary points of structures and deflection distribution along structures at a certain time can be obtained with high-precision. Therefore, the method presented can be a new alternative for the deflection evaluation and maintenance of engineering structures.

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“…GPS (global positioning system) monitoring of major infrastructure projects, notably suspension bridges, continues to develop (Ashkenazi et al, 1996;Ashkenazi and Roberts, 1997;Barnes et al, 2003;Brown et al, 1999Brown et al, , 2006Brown et al, , 2008Dan et al, 2008, Fujino et al, 2000Guo et al, 2000;Meng, 2002;Meng et al, 2005Meng et al, , 2007aRoberts et al, 2004Roberts et al, , 2008Wong, 2007).…”

Section: Introductionmentioning

confidence: 99%

Deflection and frequency monitoring of the Forth Road Bridge, Scotland, by GPS

Roberts¹,

Brown

Meng

et al. 2012

Proceedings of the Institution of Civil Engineers - Bridge Engi

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The use of carrier phase kinematic GPS (global positioning system) has evolved into a reliable technique to measure both the three-dimensional magnitudes and frequencies of movements of structures. Techniques have been developed that tackle errors caused by multipath, tropospheric delay and issues relating to satellite geometry. GPSderived movements compare well with data from both design predictions and structural models. Results from field trials carried out on the Forth Road Bridge are presented. This paper brings together key results that outline the procedure as well as a series of new data that indicate other potential applications. GPS data were collected continuously over a period of 46 h at a minimum rate of 10 Hz. During the trials wind speed, wind direction, relative humidity and temperature were also recorded. Frequently there was very heavy traffic flow, and at one point a special load (a 100-t lorry) passed over simultaneously to the heavy daytime flow of traffic. Data from a planned load trial during a brief bridge closure are reported and compared with the limited results available from a finite element model. Measured vibration frequencies are also computed from GPS data and compared with those given in the literature. In addition, results indicating the change in structural characteristics are also presented -in particular changes of mass associated with changes in traffic loading are observed. The results show the performance of GPS as it has developed in recent years, and that it can now reliably be used as a significant part of structural health monitoring schemes, giving both the magnitude of quasi-static deflections in known time periods and hence the frequency of dynamic movements of structures.

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<title>Monitoring system of the Akashi Kaikyo Bridge and displacement measurement using GPS</title>

Cited by 51 publications

References 0 publications

Detecting bridge dynamics with GPS and triaxial accelerometers

Detecting bridge dynamics with GPS and triaxial accelerometers

An Indirect Method for Monitoring Dynamic Deflection of Beam-Like Structures Based on Strain Responses

Deflection and frequency monitoring of the Forth Road Bridge, Scotland, by GPS

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