CONSOLIDATING FLOORS

For the seismic performance of a building, the role of floors is to transfer horizontal motion to walls, as well as to contain and clamp together any walls under strain. Hence, the need arises to secure existing floors, and especially floors made of steel, brick and concrete, whose materials are prone to degradation, seismic action and change in intended use likely to jeopardize their stiffness and bearing capacity.

Fibre Net developed two different methods of intervention:

FRCM (Fiber Reinforced Cementitious Matrix): the “reinforced slab” method, where GFRP meshes are conveniently connected to the floor with the “collaborating floor” method, so as to obtain thin lightweight slabs capable of distributing loads and improving stiffness.

FRP: fibre-reinforced sheeting method, where GFRP and CFRP weaves, sheets and bars are connected to the floor intrados to guarantee the reinforcement of wooden and concrete beams, so as to improve the flexural strength and bearing capacity of the structure.

Moreover, during securing operations, FRCM system is added to the intrados of brick and concrete floors whose elements have started to peel off (floor degradation).

 

FRCM

REINFORCED SLAB METHOD

Existing floors often have metal or brick and concrete beams with a weak load capacity and inadequate stiffness with respect to their current usage. Any consolidation with traditional materials, however, is often too invasive and scarcely compatible with the need to keep weight and thickness of floors low.

The excessive deformability found in floors made of different materials and with different methods of construction is easily offset by adding a thin slab on the floor extrados, reinforced with preformed GFRP meshes and secured to the underlying surface with the help of metal connections. The system helps obtain a stiff “collaborating floor” capable of distributing any horizontal seismic actions efficiently. Here, the reinforcement plays a key role in distributing the loads acting on the floor.

• LIGHTWEIGHT BUT HIGHLY RESISTANT
• CORROSION-PROOF AND COMPATIBLE WITH DIFFERENT TYPES OF MORTARS
• REDUCED WEIGHT AND THICKNESS

• EFFICIENT AND DURABLE CONSOLIDATION
• DIFFUSED AND HOMOGENEOUS MECHANICAL IMPROVEMENT
• SIMPLE AND RAPID INSTALLATION
• REDUCED HANDLING, INSTALLATION TIME AND COST

Catalogues

 

FRP

FIBRE-REINFORCED SHEETING METHOD

Consolidating the extrados of floors with poor flexural resistance and stiffness is not always feasible, as the floors often cannot be removed or the upper area cannot be reached. Moreover, the weak carrying capacity of beams can only be solved by consolidating the intrados and using a method capable of reducing flexural deformation.

Because FIBREBUILD-FRP fabrics and sheets feature excellent shear resistance and are glued with thermosetting polymer resins to the intrados of primary beams, they allow for an efficient and fast solution to reduce flexural stress and improve floor stiffness. Consolidation is made in the tension zone of beams, by carefully choosing the amount and arrangement of fibres with a view to maximizing the mechanical properties of the reinforcement, depending on the design needs.

• GREAT MECHANICAL PROPERTIES
• CORROSION-PROOF AND COMPATIBLE WITH LIME BASED MORTARS
• EXTREMELY THIN

• EFFICIENT AND DURABLE CONSOLIDATION
• MECHANICAL IMPROVEMENT WITH TARGETED CONSOLIDATION OF INDIVIDUAL SPOTS
• REINFORCEMENT CAN BE SIZED TO SPECIFIC DESIGN
• REINFORCEMENT CAN BE ADAPTED TO IRREGULAR SHAPES
• REVERSIBLE AND NON-INVASIVE CONSOLIDATION