The invention stops the bending of the bearing vertical concrete elements by imposing compressive stresses on the cross sections. as well as the tipping moment, through the anchoring mechanism which anchors strongly under the foundation ground. It also creates an improvement in the bearing capacity of the soil in both compression and traction. Prefabricated structures made of reinforced concrete are the ideal constructions in which the invention has high efficiency and utility for the following reasons. 1) Prefabricated reinforced concrete structures are rigid and the imposition of compressive stresses on the cross section makes them even more rigid and improves the shear of the base. 2) The mathematical formula to find the moment of inversion is (force X height and the product is divided by the width of the wall) If we have a prefabricated two-storey reinforced concrete structure 7 meters high and with a frame width of 4x4 meters, which accepts a lateral force of 80 tons, the tipping moment will be (7X80 / 4 =) 140 tons If we place 2 tendons on each side of the prefabricated house, then each one must create a moment of stability> 70 tons. If the same construction was based on 4 columns of dimensions 0.40X0.40X 7.00 meters then the moment of stability of the tendons would be much greater. (7Χ80 =) 560 tons 560/2 = 280 tons. So there is a big difference in dynamics, between the choice of columns and walls, and the stress of the tendons to the tensile stresses, and the anchors to the ground adhesion and the cross sections to the compression. So the choice of prefabricated is better. 3) Prefabricated houses are also industrialized and cost half the money that another construction costs. These three main reasons are where they make the patent on prefabricated houses profitable. Both cheap and anti-seismic.
https://www.researchgate.net/publication/334795246_Innovative_Structural_Solutions_for_Prefab_Reinforced_Concrete_Hall-Type_Buildings
Seismic resistance is not a "natural" feature of prefabricated structures. As a result of the design and construction process, the resulting building will to a certain extent be resistant to seismic shocks (economically justified / occurring in a given area).
Dear Piotr Knyziak
As you rightly say as an expert in prefabricated houses made of reinforced concrete,
(Seismic resistance is not a "natural" feature of prefabricated structures. As a result of the design and construction process, the resulting building will to some extent be resistant to seismic shocks)
I'm not an expert in existing technology, but I'm very much an expert in the technology I suggest.
Please correct me if I am wrong in the following that I will say ....
Elasticity stores seismic energy and returns it to each seismic load cycle.
No failures are observed in this area of elastic displacement However, seismic damping is created in the elastic displacement region by the friction of the materials which produce heat.
That is, they convert kinetic energy into thermal energy.
Prefabricated houses are completely rigid with almost zero period, and have zero seismic damping.
This is not good for prefabricated houses because seismic damping only does good.
When the ground acceleration is large the elastic construction creates large curves in the trunk of the beam and the pillar, and the elasticity begins to be lost and many small cracks are created at the ends of the beams.
These small cracks are the so-called plastic failure areas or so-called plasticity.
The mechanism of plasticity releases seismic energy, and this is good for construction.
This excess displacement outside the elastic region is the inelastic displacement region in which the plasticity mechanism occurs, but the structure does not return to its original position as it returns to the elastic displacement region.
If the earthquake is too big and the displacements will be too big and the curves in the trunk of the beam and the pillar will be too big and will create big cracks above the breaking point, and if there are many the construction will collapse.
Here's the weak point of the existing design.
In large earthquakes the existing design fails to control the inelastic displacement and the structures collapse.
If you increase the cross sections of the elements, the elasticity is lost, the seismic intensities increase as the mass increases, and the walls drop high torques at the base, due to the lack of elasticity.
Plasticity is also lost.
These stiffening factors create a large tipping moment in prefabricated houses, which creates a recoil in the total base area of the house.
The building loses ground support.
As a result, a large torque, in the opposite direction of the overturning torque is created, which is responsible for the failures of prefabricated houses.
What the mechanism of the invention does is to create a moment of stability to balance the overturning moment, so that the construction does not lose ground support.
In high-rise prefabricated houses the problem grows.
With the patent we will build prefabricated skyscrapers, with lower cost and greater seismic response.
This stability force, the mechanism takes it from the ground, so it has no mass to increase the inertia intensities.
On the other hand, the mechanism deflects all the forces of the earthquake into the ground, preventing them from being directed to the cross sections of the beams.
Still The pre-tensioning in the cross-sections of the prefabricated houses increases their dynamics by eliminating the cutting of the base, and the shear failures.
Loose soils can be sandy or clay and there is definitely water in them.
In a medium-sized earthquake, these soils recede and the structures either tilt or collapse.
The mechanism of the invention is a tool which not only pre-compacts loose soils by exerting hydraulic pressures on the horizontal and vertical axis, (before construction) to increase their bearing capacity,
but strongly tightens the construction to the ground by assuming static loads and traction loads of the base.
Successfully dealing with both seismic waves (P) and catastrophic waves (S) without losing traction with the ground.
In Poland, we do not have the problem of seismic shocks, but there are strong shocks caused by the activity of deep hard coal mines. The characteristic of shocks caused by mining damage isn't the same as that of earthquakes.
System prefabricated buildings adapted to the conditions of mining damage areas, built in Poland in the years 1970-1990, compared to the basic projects, were reinforced with additional reinforcement in concrete cast in situ, also the underground floors are monolithic.
Similar in structure, rigid prefabricated buildings in Romania survived without significant damage during one of the earthquake, many other structures collapsed.
However, the main factor probably lies in the energy of the earthquakes that the structure has to survive. In Poland and Romania, it may be a low level of energy.
Dear Piotr Knyziak
Experiment Findings EXPERIMENTAL ELEMENTS
Article The Ultimate Anti-Seismic System
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