By Jose O. Pedro
The current quantity presents a complete figuring out of the trendy standards, types and techniques of research of arch dams, for regular operation stipulations and lower than extraordinary rather a lot. this data is critical for all these all in favour of the assessment of the behaviour and of arch dams and different huge constructions, both for layout or tracking purpose.
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The current quantity presents a complete realizing of the trendy standards, versions and techniques of study of arch dams, for regular operation stipulations and less than unheard of so much. this data is critical for all these serious about the review of the behaviour and situation of arch dams and different huge buildings, both for layout or tracking function.
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Additional resources for Arch Dams: Designing and Monitoring for Safety
For the thennal models, the main direct effects are the temperature distribution in the and the corresponding volume variations. body, dam The consequences of the direct effects, particularly of the hydraulic effects, may be the overtopping, the erosion of the appurtenant works and foundation (local scour, abrasion and cavitation), and the internal erosion in the foundation (piping), particularly along joints and faults of the rock mass. The presence of water in the dam body and foundation promotes the development of physic-chemical phenomena, which lead to a degradation of the concrete, masonry, and rock mass.
There were: - Oblique cracks, on the downstream face of the arches, following the direction of the principal compressive stresses, which were caused by the combined effect of the water pressure with the severe climatic conditions at the site (the annual temperature extremes are -45° C and +35° C, and 50 freezing- thawing cycles develop in an average year). - Plunging cracks, in large zones near the arch heels, nearly all of which penetrate the entire thickness of the arches and cause leakage. These cracks are attributed to the water loads, combined with the lack of vertical curvature in the arches, near the foundation.
COLD 1974/81, USCOLD 1988): -the Gleno multiple arch dam, a concrete structure (35 m high, a crest length of 224 m) completed in 1923, near Bergamo (Italy), which failed in the same year; - the Moyie (Eileen) arch dam, a concrete structure (16 m high, a crest length of 4 7 m) completed in 1924, in Idaho (USA), which failed in 1926; -the Lake Lanier arch dam, a concrete structure (19 m high) completed in 1925, in the Vaughn Creek river (North Carolina, USA), which failed in 1926; -the Malpasset arch dam, a concrete structure (66 m high, a crest length of 222 m) completed in 1954, near Nice (France), which failed in 1959; - the ldbar arch dam, a concrete structure (38 m high, a crest length of 108 m) completed in 1959, in ex-Yugoslavia, which failed in 1960.
Arch Dams: Designing and Monitoring for Safety by Jose O. Pedro