Abstract
This chapter is focused on the Portuguese experience on the development and exploration of systems for continuously monitoring dam vibrations, using accelerometers. The pioneer system for seismic and structural health monitoring (SSHM) installed in Cabril dam (the highest Portuguese arch dam: 132 m high) is described in detail. The design of this system was the result of a long-term LNEC research program, still ongoing. These monitoring systems should include software developed to automatically perform the analysis of collected data, including the automatic comparison with numerical results from 3DFE models. In view of the good results obtained with the system in operation in Cabril dam since 2008, similar systems have been installed in other large dams in Portugal, particularly in recently built dams. Finally, Baixo Sabor dam is presented as an example of a new Portuguese dam with a complete SSHM system, in operation since 2015. The main experimental results obtained for both dams are shown, namely the evolution of natural frequencies over time, mode shapes and the measured seismic response to earthquake events.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Oliveira S (2002) Continuous monitoring system for the dynamic performance assessment of arch dams. Sub-program D. In: Study of evolutive deterioration processes in concrete dams. Safety control over time. National Program for Scientific Re-equipment funded by FCT, REEQ/815/ECM/2005, LNEC-FEUP (in Portuguese)
Oliveira S, Silvestre A (2017) Cabril dam system for continuous vibrations monitoring. LNEC Report 205/2017—DBB/NMMR, LNEC (in Portuguese)
Oliveira S, Alegre A (2018) Vibrations in large dams. Monitoring and modelling. In: 26th congress and 86th annual meeting, Vienna, Austria, 1–7 July
Oliveira S, Espada M, Câmara R (2012) Long-term dynamic monitoring of arch dams. The case of Cabril dam, Portugal. In: 15th world conference on earthquake engineering, Lisbon
Oliveira S, Ferreira I, Berberan A, Mendes P, Boavida J, Baptista B (2010) Monitoring the structural integrity of large concrete dams. The case of Cabril dam, Portugal. In: Hydro2010, Lisbon
Oliveira S, Mendes P, Garret A, Costa O (2011) Long-term dynamic monitoring systems for the safety control of large concrete dams. The case of Cabril dam, Portugal. In: 6th International conference on dam engineering, LNEC, Lisbon
Gomes JP, Palma J, Magalhães F, Pereira S, Monteiro G, Matos D (2018) Seismic monitoring system of Baixo Sabor scheme for structural dynamic behavior monitoring and risk management. In: ICOLD 26th congress and 86th annual meeting, Vienna, Austria, 1–7 July
Bukenya P, Moyo P, Oosthuizen C (2014) Long term ambient vibration monitoring of Roode Elsberg Dam—initial results. In: Proceedings of the ICOLD 2014 international symposium on dams in global environmental challenges, Bali, Indonesia, 1–6 June 2014, pp 594–602
Bukenya P, Moyo P, Oosthuizen C (2016) Long term integrity monitoring of a concrete arch dam using continuous dynamic measurements and a multiple linear regression model. In: ICOLD 2016
Moyo P, Bukenya P (2017) Experiences with continuous monitoring of deformation and modal properties of an arch dam. In: Proceedings of SHMII-8 structural health monitoring of intelligent infrastructure conference, Queensland University of Technology, Brisbane, Australia, 5–8 Dec 2017
Brincker R, Ventura C (2015) Introduction to Operational Modal Analysis. Wiley
Brincker R, Zhang L, Andersen P (2000) Output-only modal analysis by frequency domain decomposion. In: Proceedings of the ISMA25 noise and vibration engineering, vol 11, Leuven, Belgium, 13–15 Sept, pp 717–723
Zienkiewicz O, Taylor R, Zhu J (2005) The finite element method: its basis and fundamentals, 6th ed, Elsevier Butterworth-Heinemann
Oliveira S, Alegre A, Silvestre A, Espada M, Câmara R (2015) Seismic safety evaluation of Luzzone dam. Use of a 3DFEM state formulation in pressures and displacements. In: 13th ICOLD international benchmark workshop on numerical analysis of dams, EPFL, Lausanne
Oliveira S, Silvestre A, Espada M, Câmara R (2014) Modelling the dynamic behavior of dam-reservoir-foundation systems considering generalized damping. Development of a 3DFEM state formulation. In: 9th International conference on structural dynamics, EURODYN 2014, Porto
Chen H (2014) Seismic safety of high concrete dams. Earthq Eng Vib 13:1–16
Chopra AK, Wang J (2012) Comparison of recorded and computed earthquake response of arch dams. In: 15th world conference on earthquake engineering, Lisbon
Oliveira S, Mendes P (2006) Development of a Cabril dam finite element model for dynamic analysis using ambient vibration test results. In: III ECCSM, LNEC, Lisbon
Oliveira S, Rodrigues J, Mendes P, Costa, A (2003) Monitoring and modelling the dynamic behaviour of concrete dams. In: VII congress applied and computational mechanics, University of Évora (in Portuguese)
Westergaard HM (1993) Water pressures on dams during earthquakes. Transactions (ASCE) 98:418–472
Acknowledgements
The authors wish to acknowledge the Portuguese Company of Electricity (EDP) and the Portuguese Foundation for Science and Technology for supporting the installation of the Cabril dam vibrations monitoring system (REEQ/815/ECM/2005) and for the Ph.D. grant SFRH/BD/116417/2016.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 Springer Nature Switzerland AG
About this chapter
Cite this chapter
Oliveira, S., Alegre, A. (2019). Seismic and Structural Health Monitoring of Dams in Portugal. In: Limongelli, M., Çelebi, M. (eds) Seismic Structural Health Monitoring. Springer Tracts in Civil Engineering . Springer, Cham. https://doi.org/10.1007/978-3-030-13976-6_4
Download citation
DOI: https://doi.org/10.1007/978-3-030-13976-6_4
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-13975-9
Online ISBN: 978-3-030-13976-6
eBook Packages: EngineeringEngineering (R0)