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Assessment of static and seismic behaviour of Janneh Dam

pubblicazioni - Memoria

Assessment of static and seismic behaviour of Janneh Dam

Sono documentate le attività di modellazione FEM statica e sismica della diga di Janneh, una grande diga ad arco-gravità in costruzione in libano, proposto nell’ambito del 14° ICOLD Benchmark Workshop sull’analisi numerica delle dighe. L’obiettivo dello studio è di comprendere quanto modelli di analisi più sofisticati possano portare a una migliore descrizione del comportamento della struttura, e quali possono essere le principali difficoltà e criticità della loro adozione.

The static and seismic FEM modelling of Janneh Dam, a large concrete arch-gravity dam under construction in Lebanon, has been proposed as Theme B of the 14th ICOLD Benchmark Workshop on the Numerical Analysis of Dams. Different stages of increasing complexity have been required for both static and seismic numerical analyses: all the mandatory stages have been performed together with two further analyses, aimed to investigate the influence of the non-linear dam-foundation interface and the water compressibility on the dynamic response of the dam.

The analyses have been carried out using the RSE in-house FEM code CANT-SD, specifically designed for dynamic linear and non-linear analyses of dam-reservoir systems, gradually improving the numerical model by using physic laws able to better represent the actual dam-foundation-reservoir system. The performed set of simulations, representative of a progressive analyses approach suggested by many international recommendations for the seismic safety assessment of dams, confirms the importance of including both non-linear effects and advanced fluid-structure interaction.

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