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Continuous monitoring of a long-span cable-stayed timber bridge

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Abstract

This paper presents the system structure and results of a continuous monitoring system that is applied on the longest span cable-stayed timber bridge in Scandinavia. We have installed a combined global navigation satellite and environmental monitoring system with temperature, wind speed, wind direction and humidity observations on the bridge and apply a holistic approach to investigate the environmental effects on the bridge. Our results show that temperature changes and total deformation of the timber bridge have strong relation to the thermal expansion coefficient of the steel cables. However, the measured total deformation of the timber bridge is still within the design limits according to European standards which validate the design criteria. The relations between transverse wind speed and transverse deformation of the bridge were experimentally investigated, but no direct relations were found that imperils the structural integrity.

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Acknowledgments

This work presented in this article is a part of the Sense Smart City project financed by the EU structural funds, Skellefteå Municipality, and the Regional Council of Västerbotten. We would like to thank the Cost Action FP1101 group and their members for the valuable contributions and COWI AB for providing aerodynamic stability report. We also thank Anders Gustafsson and Per-Anders Fjellström for their help in creating the monitoring system structure. The GNSS system was purchased through Leica Geosystems ATHENA Program.

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Authors and Affiliations

  1. Department of Measurement Technology, SP Technical Research Institute of Sweden, Skeria 2, SE-931 77,, Skelleftea, Sweden

    Erhan Saracoglu

  2. Department of Measurement Technology, SP Technical Research Institute of Sweden, Box 857, SE-501 15,, Boras, Sweden

    Sten Bergstrand

Authors
  1. Erhan Saracoglu
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  2. Sten Bergstrand
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Correspondence to Erhan Saracoglu.

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Saracoglu, E., Bergstrand, S. Continuous monitoring of a long-span cable-stayed timber bridge. J Civil Struct Health Monit 5, 183–194 (2015). https://doi.org/10.1007/s13349-014-0088-1

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  • DOI: https://doi.org/10.1007/s13349-014-0088-1

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