International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage
(2451) Line of arch centres
The line of arch centres is a line passing through the arch centres in plan or profile. Arch centres are so located that they will be on smooth profile curves in a vertical plane. In the case of a constant-centre type of arch dam a single vertical line will be the locus of the arch centres. For variable centre dams separate profile curves will be the loci of the arch centres for the upstream face, the centre line, and the downstream face. In the case of symmetrical layouts the vertical plane through the arch centres will generally intersect the dam at the place of maximum deflection.

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