By Jose O. Pedro
The current quantity offers a entire figuring out of the fashionable standards, versions and strategies of study of arch dams, for regular operation stipulations and lower than extraordinary rather a lot. this data is critical for all these taken with the overview of the behaviour and of arch dams and different huge buildings, both for layout or tracking purpose.
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Extra resources for Arch Dams: Designing and Monitoring for Safety
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. The structural effects are the displacements (horizontal, vertical, angular), joint and crack movements, strains, and stresses. The consequences of the structural effects may be a global failure (overturning, settlement, heaving, or sliding of a large volume of the dam and the foundation) or punctual failures (cracking, shearing, and crushing).
It is, however, very heterogeneous, because the data were reported by different authors (with their own criteria), the respective dams were built in different periods and regions, and they were built with different dimensions, purposes, and monitoring systems. 5%) is smaller than that for other concrete dams and it represents, in average, one accident per year for 200 arch dams. 8%) (1) At the end of 1975 (2) Including accidents (global failure, affecting the safety) and incidents (punctual failure, affecting the performance) (3) Not including failures due to study purposes, bombing, etc.
Monitoring allows a continuous updating of the knowledge about the dam's condition throughout its lifetime, and therefore provides a great improvement in the timely detection and correction of eventual deterioration scenarios. ) becomes very small, although never zero. Civil defence measures should therefore be foreseen to be launched in the case of an accident especially to protect the population. The efficiency of the preventive and mitigation measures taken in the design, construction, operation, monitoring, and civil defence, depends very much on its correct implementation.