La anti-seismic renovation of an existing building it can affect any element that needs to be secured, from foundations ai floorsand at our wall up to roof. For adapt a building from the seismic point of view and make it resistant in the event of an earthquake, there are several interventions that can be implemented. The work required depends on the state of the building and can be minimally invasive or require more important renovations, especially in the case of renovation of condominiums with a few tens of years on his shoulders.
Especially in a seismic country like Italy, carrying out the appropriate interventions based on current regulations is essential for limit damage to structures and people during the telluric event. Let's see now how to proceed for the seismic adaptation of a building.
What are the seismic interventions that can be carried out?
Generally speaking, anti-seismic building interventions have the purpose of improve the structural safety of the existing building, with works that may concern thewhole building or part of it (such as some particularly deteriorated areas or damaged structural elements).
The interventions to be implemented vary from structure to structure: the seismic adaptation of a reinforced concrete building is very different from that of a steel or stone building.
Regarding one single home, it will be easy to decide independently on which elements to intervene and in what way: you can choose to demolish and rebuild the house or simply restructure. Another argument instead for theseismic adaptation of a condominium, for which the resolution of the assembly of the tenants.
The key principles on which an effective seismic improvement is based are inspired byJapanese anti-seismic construction and the rules to be observed when constructing new buildings: installation of devices of seismic protection (both active and passive), choice of materials by weight and the features and use of resistant elements to the shocks.
In light of this, let's find out what are the particular interventions that can be carried out, from the foundations to the roof.
Anti-seismic interventions: foundations and floors
Let's start with foundations: how can we intervene on this element at the base of the construction?
Consolidate the foundation it is important to ensure the stability of the structure: following the analysis of the soil, these interventions can be carried out with injections of material specific or by inserting reinforcement elements.
To make sure that the house is even more resistant in the event of an earthquake, we can foresee theinstallation of seismic isolators, passive devices that decouple the movement of the ground from the superstructure, absorbing part of the seismic energy and limiting the movement of the building.
And i floors? You can also intervene on these, making the support surface more solid and installing expansion joints that allow minimal movements to the structure without major damage.
Anti-seismic renovation of perimeter and internal walls
I perimeter and internal walls are another important factor to take into consideration in earthquake-resistant renovations. You can intervene with thedeep injection of reinforcing materials, which go to remedy the possible damage caused by time (such as cracks and obvious deterioration). They can also be inserted structural reinforcements in the critical points, preferring those in carbon fiber, particularly light, adaptable and resistant.
An alternative, to be evaluated also on the basis of the type of structure, is to use methods of holding walls together: steel bars, tie rods, chains or reinforced plaster.
The insertion or replacement of anti-seismic joints and installing passive seismic dissipators in certain points of the structure there are additional elements capable of increasing the stability of the building.
And the roof? Anti-seismic interventions to be implemented
The last, but not least, element to be included in the seismic retrofit is the roof of the house. The main feature it must possess for resist an earthquake and the lightness: a light roof, in fact, does not weigh on the walls and the rest of the structure and is less likely to collapse during tremors.
How to make the roof lighter? For the roofing of buildings we can prefer the wood, perhaps by inserting a structure of beams made of this material. In the case of a reinforced concrete roof, it is important to check that there is a perimeter curb.
Costs and deductions for anti-seismic renovation
Having reviewed all the anti-seismic interventions that we can carry out, how much the renovation of a building can cost? Depending on the work required and the technologies used, adapting an existing building can turn out to be one important expense to be incurred, with long times and the need to evacuate the building.
We can reduce the economic impact of the costs of seismic adaptation by taking advantage of the 110% Super Sismabonus deduction, which makes it possible to renovate buildings practically "at no cost".
The ISAAC active system for the seismic retrofitting of buildings
The concession also includes i smart systems building protection, such as i active anti-seismic devices. This technology comes installed directly on the roof of the building and is ideal for those who want minimally invasive seismic interventions, fast and convenient from an economic point of view.
ISAAC technology can be used for seismic renovation of a 60s building, improving its resistance in the event of an earthquake.
To ensure maximum effectiveness of the intervention, before installation our technicians, through special simulations, verify how many devices are needed and where on the roof they are to be installed. In this way we obtain the best configuration for each facility and the seismic protection guaranteed by ISAAC systems is increased.