Guide for the Structural Rehabilitation of Heritage ... - Test Input

An alternative solution, very useful in particular situations, will be the insertion of strengtheningcomponents (in steel or timber), glued to the extrados of the masonry, which provides stiffnessto the vault and in which the barrier effect is much less sensitive (Fig. 31).Figure 30 Tying of masonry vaults with tie-rods insteel (21)Figure 31: Strengthening of masonry vault withtimber ribs glued on the extrados (8)When blocks have become out of position, an adequate solution will be dismantling, followedby rebuilding in the correct position. In very severe situations, when the shape of the elementhas been heavily changed, it can be more appropriate to demolish the element, followed byits reconstruction using materials similar to the original ones.In the case of filled vaults, one possible solutionwill be the reduction of weight or, if appropriate,the adjustment of its distribution.In the case of floors made with brick vaultssupported on steel beams, an adequatemeasure to restrict their lateral separation willconsist in the placing of tie-rods, in steel,welded onto the bottom flange of the beams.c) Towers and chimneysThe most common solution for thestrengthening of this type of element consistsofn tying them with horizontal ties, usually, steelstrips or cables (Fig. 32), or by wrapping themwith glued composites (CFRP, GRC, etc.).In the case of prismatic towers an appropriatemeasure will be the provision of diaphragms (inconcrete or steel), at intermediate levels, for theconfinement of the walls.Figure 32: Tying of masonry tower with steelstrips (21)40/48