59 Renovation of the water tower of Dendermonde Feasibility study concerning renovation of the water tower of Dendermonde (B). The shaft of this water tower is constructed following the Monnoyer-type. This means that it is assembled with not-reinforced stacked concrete elements. They are connected by means of ribs of in situ cast reinforced concrete. Horizontal annular girders at the height of the intermediate levels are used to stiffen the structure. The reservoir is fabricated with in situ cast reinforced concrete of the Intzetype, i.e. with a bottom plate with a convex form. Aservice duct is constructed around the reservoir. It is composed with concrete bricks and stiffened with vertical ribs of in situ cast reinforced concrete. Reinforcement is placed in the joints between the concrete bricks. The roof dome is a spherical shell of in situ cast reinforced concrete. Dimensions: Height tower 37,50m Diameter duct 12,80m Diameter reservoir 10,80m. The concrete elements are very thin. Their dimensions • Roof and covering reservoir: thickness 6cm • Walls above: thickness 6 cm • Columns section 0,21m x 0,26m • Walls shaft: thickness 0,10m to 0,14m • Bottom reservoir: thickness 0,13m • Walls reservoir: thickness 0,08m to 0,22m Using the finite element modules of ESA-Prima Win, we built models and made linear elastic calculations of the shell, plate and beam-elements for the reservoir and the shaft with the duct. Calculation was done with partial safety factors according NBN B03-001. The wind was calculated according NBN B03-002. Conclusions were that - even under full load - this “healthy” construction satisfies all the requirements of the indicated norms. Short Description
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