Estimation of load redistribution in a cable-stayed bridge using a combination of sensing techniques

Daniele Zonta; Paolo Esposito; Marco Molignoni; Matteo Pozzi; Riccardo Zandonini; Ming Wang; Yang Zhao; Daniele Inaudi; Daniele Posenato; Branko Glisic

doi:10.1117/12.917540

Estimation of load redistribution in a cable-stayed bridge using a combination of sensing techniques

Daniele Zonta^*, Paolo Esposito, Marco Molignoni, Matteo Pozzi, Riccardo Zandonini, Ming Wang, Yang Zhao, Daniele Inaudi, Daniele Posenato, Branko Glisic

^*Corresponding author for this work

Civil And Environmental Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

2 Citations (Scopus)

Abstract

The motivation of this work is the installation of a monitoring system on a new cable-stayed bridge spanning the Adige River 10 km north of the town of Trento. This is a statically indeterminate structure, having a composite steel-concrete deck of length 260 m overall, supported by 12 stay cables, 6 per deck side. These are full locked steel cables of diameters 116 mm and 128 mm, designed for operational loads varying from 5000 to 8000 kN. The structural redundancy suggests that plastic load redistribution among the cables can be expected in the long term. To monitor such load redistribution, the owner decided to install a monitoring system to measure cable stress; the precision specified was of the order of few MPa. However no cable release or any form of on-site calibration involving tension change was allowed. The solution found was a combination of built-on-site electromagnetic and fiber-optic elongation gauges, these appropriately distributed on both the cables and the anchorages. We discuss how the set of gauges allows tension and elongation measurement with the appropriate precision, and compare the initial monitoring results with the tension estimates made using a non-destructive vibration test.

Original language	English
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Place of Publication	Bellingham
Volume	8345
DOIs	https://doi.org/10.1117/12.917540
Publication status	Published - 2012
Event	Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012 - San Diego, CA, United States Duration: 12 Mar 2012 → 15 Mar 2012

Conference

Conference	Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012
Country/Territory	United States
City	San Diego, CA
Period	12/03/12 → 15/03/12

Keywords

cable stayed bridge
data analysis
elasto-magnetic sensor
fiber Bragg grating
monitoring

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10.1117/12.917540

Cite this

Zonta, D., Esposito, P., Molignoni, M., Pozzi, M., Zandonini, R., Wang, M., Zhao, Y., Inaudi, D., Posenato, D., & Glisic, B. (2012). Estimation of load redistribution in a cable-stayed bridge using a combination of sensing techniques. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8345). Article 834509. https://doi.org/10.1117/12.917540

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title = "Estimation of load redistribution in a cable-stayed bridge using a combination of sensing techniques",

abstract = "The motivation of this work is the installation of a monitoring system on a new cable-stayed bridge spanning the Adige River 10 km north of the town of Trento. This is a statically indeterminate structure, having a composite steel-concrete deck of length 260 m overall, supported by 12 stay cables, 6 per deck side. These are full locked steel cables of diameters 116 mm and 128 mm, designed for operational loads varying from 5000 to 8000 kN. The structural redundancy suggests that plastic load redistribution among the cables can be expected in the long term. To monitor such load redistribution, the owner decided to install a monitoring system to measure cable stress; the precision specified was of the order of few MPa. However no cable release or any form of on-site calibration involving tension change was allowed. The solution found was a combination of built-on-site electromagnetic and fiber-optic elongation gauges, these appropriately distributed on both the cables and the anchorages. We discuss how the set of gauges allows tension and elongation measurement with the appropriate precision, and compare the initial monitoring results with the tension estimates made using a non-destructive vibration test.",

keywords = "cable stayed bridge, data analysis, elasto-magnetic sensor, fiber Bragg grating, monitoring",

author = "Daniele Zonta and Paolo Esposito and Marco Molignoni and Matteo Pozzi and Riccardo Zandonini and Ming Wang and Yang Zhao and Daniele Inaudi and Daniele Posenato and Branko Glisic",

year = "2012",

doi = "10.1117/12.917540",

language = "English",

isbn = "9780819490025",

volume = "8345",

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note = "Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012 ; Conference date: 12-03-2012 Through 15-03-2012",

}

Zonta, D, Esposito, P, Molignoni, M, Pozzi, M, Zandonini, R, Wang, M, Zhao, Y, Inaudi, D, Posenato, D & Glisic, B 2012, Estimation of load redistribution in a cable-stayed bridge using a combination of sensing techniques. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8345, 834509, Bellingham, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, San Diego, CA, United States, 12/03/12. https://doi.org/10.1117/12.917540

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AU - Zonta, Daniele

AU - Esposito, Paolo

AU - Molignoni, Marco

AU - Pozzi, Matteo

AU - Zandonini, Riccardo

AU - Wang, Ming

AU - Zhao, Yang

AU - Inaudi, Daniele

AU - Posenato, Daniele

AU - Glisic, Branko

PY - 2012

Y1 - 2012

N2 - The motivation of this work is the installation of a monitoring system on a new cable-stayed bridge spanning the Adige River 10 km north of the town of Trento. This is a statically indeterminate structure, having a composite steel-concrete deck of length 260 m overall, supported by 12 stay cables, 6 per deck side. These are full locked steel cables of diameters 116 mm and 128 mm, designed for operational loads varying from 5000 to 8000 kN. The structural redundancy suggests that plastic load redistribution among the cables can be expected in the long term. To monitor such load redistribution, the owner decided to install a monitoring system to measure cable stress; the precision specified was of the order of few MPa. However no cable release or any form of on-site calibration involving tension change was allowed. The solution found was a combination of built-on-site electromagnetic and fiber-optic elongation gauges, these appropriately distributed on both the cables and the anchorages. We discuss how the set of gauges allows tension and elongation measurement with the appropriate precision, and compare the initial monitoring results with the tension estimates made using a non-destructive vibration test.

AB - The motivation of this work is the installation of a monitoring system on a new cable-stayed bridge spanning the Adige River 10 km north of the town of Trento. This is a statically indeterminate structure, having a composite steel-concrete deck of length 260 m overall, supported by 12 stay cables, 6 per deck side. These are full locked steel cables of diameters 116 mm and 128 mm, designed for operational loads varying from 5000 to 8000 kN. The structural redundancy suggests that plastic load redistribution among the cables can be expected in the long term. To monitor such load redistribution, the owner decided to install a monitoring system to measure cable stress; the precision specified was of the order of few MPa. However no cable release or any form of on-site calibration involving tension change was allowed. The solution found was a combination of built-on-site electromagnetic and fiber-optic elongation gauges, these appropriately distributed on both the cables and the anchorages. We discuss how the set of gauges allows tension and elongation measurement with the appropriate precision, and compare the initial monitoring results with the tension estimates made using a non-destructive vibration test.

KW - cable stayed bridge

KW - data analysis

KW - elasto-magnetic sensor

KW - fiber Bragg grating

KW - monitoring

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DO - 10.1117/12.917540

M3 - Conference contribution book

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SN - 9780819490025

VL - 8345

BT - Proceedings of SPIE - The International Society for Optical Engineering

CY - Bellingham

T2 - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012

Y2 - 12 March 2012 through 15 March 2012

ER -

Estimation of load redistribution in a cable-stayed bridge using a combination of sensing techniques

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