Abstract
This paper focuses on presenting a complete study on the dynamic behavior of Cahora Bassa dam (Mozambique), a 170 m high double curvature arch dam which has been under continuous vibrations monitoring since 2010. The installed Seismic and Structural Health Monitoring system was designed to continuously record acceleration time series in several locations in the dam body (crest gallery) and near the dam-rock interface, under ambient/operational vibrations and during seismic events, using uniaxial and triaxial accelerometers. The system was complemented with the development of software for automatic modal identification and automatic detection of seismic vibrations. The numerical simulations are carried out using a 3D finite element program, based on a solid-fluid coupled formulation to simulate the dam-reservoir-foundation system, considering dam-water dynamic interaction and propagation of pressure waves throughout the reservoir. The main experimental outputs are presented and compared with results from 3D finite element analysis, including the evolution of identified natural frequencies over time, vibration mode shapes, and the seismic response in accelerations. Finally the non-linear seismic behavior of Cahora Bassa dam is studied for an input accelerogram with a 0.6 g peak acceleration, considering the joints movements and a damage model for concrete.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Limongelli, M.P., Çelebi, M.: Seismic Structural Health Monitoring: From Theory to Successful Applications. Springer Tracts in Civil Engineering. Springer, Cham (2019)
Oliveira, S., Alegre, A.: Seismic and structural health monitoring of dams in Portugal. In: Limongelli, M., Çelebi, M. (eds.) Seismic Structural Health Monitoring - From Theory to Successful Applications. Springer Tracts in Civil Engineering, pp. 87–113. Springer (2019)
Oliveira, S., Alegre, A.: Vibrations in large dams. Monitoring and modelling. In: ICOLD 26th Congress and 86th Annual Meeting, Vienna, Austria (2018)
Alegre, A., Carvalho, E., Matsinhe, B., Mendes, P., Oliveira, S., Proença. J.: Monitoring vibrations in large dams. In: HYDRO 2019, Porto, Portugal (2019)
Carvalho, E.F., Tembe, I.: On-line dynamic monitoring of Cahora Bassa dam. In: International Symposium on Dams for a Changing World, Kyoto, Japan (2012)
Carvalho, E.F., Matsinhe, B.T.: First steps on automatic data acquisition and analysis system in Cahora Bassa dam. In: HYDRO 2014, Como, Italy (2014)
Carvalho, E.F., Matsinhe, B., Oothuizen, C.: Monitoring system of Cahora Bassa dam … the past, present and way forward. In: International Symposium on “Appropriate technology to ensure proper Development, Operation and Maintenance of Dams in Developing Countries”, Johannesburg, South Africa (2016)
Bukenya, P., Moyo, P.: Monitoring the structural behavior of concrete arch dams: the case of Roode Elsberg dam, South Africa. In: SANCOLD Conference on Management of Dams and Reservoirs in Southern Africa, Centurion, Thswane, South Africa (2017)
Brincker, R., Zhang, L., Andersen, P.: Output-only modal analysis by frequency domain decomposition. In: ISMA25 Noise and Vibration Engineering, Leuven, Belgium (2000)
Zienkiewicz, O.C., Bettess, P.: Fluid-structure dynamic interaction and wave forces. An introduction to numerical treatment. Int. J. Numer. Meth. Eng 13, 1–16 (1978)
Zienkiewicz, O.C., Taylor, R.L., Zhu, J.Z.: The Finite Element Method: Its Basis and Fundamentals. 6th edn. Elsevier Butterworth-Heinemann (2005)
Proulx, J., Darbre, G.R., Kamileris, N.: Analytical and experimental investigation of damping in arch dams based on recorded earthquakes. In: 13th World Conference on Earthquake Engineering, Vancouver, Canada (2004)
Robbe, E., Kashiwayanagi, M., Yamane, Y.: Seismic analyses of concrete dam, comparison between finite-element analyses and seismic records. In: 16th World Conference on Earthquake Engineering, Santiago, Chile (2017)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2021 Springer Nature Switzerland AG
About this paper
Cite this paper
Oliveira, S., Carvalho, E., Matsinhe, B., Mendes, P., Alegre, A., Proença, J. (2021). Seismic and Structural Health Monitoring of Cahora Bassa Dam. In: Rizzo, P., Milazzo, A. (eds) European Workshop on Structural Health Monitoring. EWSHM 2020. Lecture Notes in Civil Engineering, vol 127. Springer, Cham. https://doi.org/10.1007/978-3-030-64594-6_8
Download citation
DOI: https://doi.org/10.1007/978-3-030-64594-6_8
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-64593-9
Online ISBN: 978-3-030-64594-6
eBook Packages: EngineeringEngineering (R0)