No it is not controlled. Today's seismic construction technology does not have the technology to control the inelastic displacement of structures.
According to modern regulations, the seismic design of buildings is based on the requirements of adequate competent design and plasticity. under strong seismic excitation is directed to selected elements and failure mechanisms.
What is called
Elastic displacement area is the area in which the structure is deformed during the rocking of the earthquake without creating cracks in the bearing elements
What is the inelastic displacement region?
If the seismic energy (measured by ground acceleration) is too large, it will produce excessively large displacements that will cause a very high curvature in the vertical and horizontal elements. If the curvature is too high, this means that the rotation of the sections of columns and beams will be well above the elastic area (Compressive concrete deformation over 0.35% and reinforcement fiber stresses over 0.2 %) beyond the leakage limit. When the rotation exceeds this limit of elasticity, the structure begins to "dissolve the energy storage" through plastic displacement, which means that the parts will have a residual displacement that will not be able to be recovered (while in the elastic region all displacements are recovered). Basically the design of the strength of a current building is limited to the limits of the elastic design range, and then goes to the default plastic leak areas, which are default areas of small and many leak failures, (usually designed to occur at the ends of the beams) so that it does not collapse the structure. This is the mechanism of plasticity that releases seismic energy. (Structure collapses when oblique / failed columns fail) If the parts that experience the plastic deformations exceed the breaking point limit, and there are too many on the structure, the structure will collapse.
The big question is whether there is a suitable design that can control the displacements of the structure
I present this design to you below.
The Patent Idea
We have placed on a table two columns, one column screwed on the table, and the other simply put on the table. If one shifts on the table, the unbolted column will be overthrown. The bolted column withstands the lateral loading. We do exactly the same in every column of a building to withstand more lateral earthquake loading. That is done, by simply screwing it to the ground. This pretension between the roof of the structure and the soil has been globally disclosed for the first time.
The horizontal earthquake load generates oscillation, and the result is that the upper plates shift more than the lower ones, the columns lose their eccentricity exerting a lifting force on the bases, as well as creating a twisting action in all of the nodes of the structure.
The ideal situation would be if one could construct a building framework where, during an earthquake, all the plates would shift by the same amplitude, at the ground without differing phases.
The research I have carried out resulted in just this. The method of the invention eliminates all these problems of deformation in the building construction applying pretension, through the mechanism, between the upper edges of all the sides of the walls and the foundation ground.
The result of this design method is
a) To control the displacements of the upper floors 100%
b) To deflect the correct forces (tensile and compressive) into the ground, preventing the creation of torques around the nodes.
c) To create a strong cross-section in the wall, so that it can receive without failure the shear force at the base.
d) Creates a strong foundation ground under the base sole to receive compressive and traction forces.
It generally stops the deformation of the building by controlling the displacement of floors. Without inelastic deformation there are no failures.
The design of the building can divert a force in different areas.
If you plan to transfer the force on the beam then the beam will break.
If you plan to transfer the force into the ground the beam will not break.
This is what I show you.
I show you the design method ....how I plan to divert the force of the earthquake into the ground.
It is a method that uses a mechanism to pontoon nodes of higher level of constructions with earth and which dynamically deflect the lateral load of the earthquake through the vertical support elements and directs them into the ground
( preventing forces from being directed at the beams ) controlling in this way the oscillation of the construction.
https://www.youtube.com/watch?v=zhkUlxC6IK4
https://www.youtube.com/watch?v=8t-q8L-45RU
Dear Aparna Sathya Murthy
Yes correctly! There is deformation in the elastic displacement but it is not permanent and no failures occur. In inelastic displacement there is permanent deformation.
A change in shape is called deformation : ... inelastic deformation is not fully reversed when the force is removed - there is a permanent change in shape.
Change of shape - Forces and elasticity - AQA - GCSE Combined ...
https://www.bbc.co.uk › bitesize › guides › revision
Ioannis Lymperis, your question is interesting, but much more interesting is your development of the topic and your example. Congratulations.
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