|
Titre :
|
Some hydraulic aspects during overflow above inflatable flexible membrane dam
|
|
Auteurs :
|
H. Chanson ;
UNIVERSITY QUEENSLAND AUSTRALIA
|
|
Type de document :
|
ouvrage
|
|
Editeur :
|
Brisbane, Australia : University of Queensland, 1996
|
|
ISBN/ISSN/EAN :
|
978-0-86776-644-8
|
|
Format :
|
60 p.
|
|
Langues:
|
= Anglais
|
|
Mots-clés:
|
BARRAGE MOBILE
;
HYDRAULIQUE
;
MODELISATION
;
CRUE
|
|
Résumé :
|
Inflatable flexible membrane dams (IFMD) have been used for the past 40 years in river and coastal engineering applications. In open channels, they are commonly used to raise water levels, to increase water storage or to prevent chemical dispersion. Despite the increasing interest for IFMD, little information is available on the hydraulic performance of IFMD during overflow periods. Overflow above IFMD may induce some form of fluid-structure interaction, which might cause vibrations of the IFMD structure. Such instabilities might damage or destroy the inflatable dam and they are not acceptable. Overflow situations may occur with deflated membranes. Both situations are reviewed in the present report. The investigation details the fluid-structure interactions. The associated problems (i.e. instability) and hazards are discussed for overflow situations above inflated dams, the author analyses IFMD without deflector and IFMD with deflector (also called fin). Ideal-fluid flow calculations provide information on the wall pressure along the downstream face of the dam in absence of deflector. New information is provided also for an optimum design of the deflector.
|
