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Old Posted Oct 14, 2020, 7:15 PM
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The three schools of seismic design.

The truth is that I rewrite the seismic technology of constructions from the beginning, for the following reason.
Several years ago there were two schools of civil engineering. Their dispute was whether a) the structures should have great flexibility or if they should b) be rigidly constructed with great dynamics.
a) Elastic structures have the privilege of storing seismic energy in their cross sections and returning it reduced when they return to their original position. They return it reduced due to the fact that the friction that develops in the grains of their structure during the bending of their trunk converts the kinetic energy into thermal and thus there is partial seismic damping. If the displacement is large then inelastic displacements are created, which means that they do not return to their original position after bending and show leaks with obvious cracks, which also release more seismic energy. Too large displacements drop the structures.
b) Rigid structures are those that have very large walls instead of small cross-section columns.
They show low seismic damping because they do not bend much but are durable because they have dynamics. For example, rigid constructions are prefabricated entirely of reinforced concrete.
The problem with rigid high-rise structures is that they are easily overturned due to rigidity.
When they are overturned, the entire area of ​​the base of the building is raised, losing its contact with the ground that is supported.
As a result, the unsupported loads of the building create reciprocal torques at the nodes and break the walls or overturn the entire high-rigid structure.
Eventually the school of civil engineering prevailed, which wanted elastic and plastic constructions.
Research was done and anti-seismic regulations were written which are followed by civil engineers.
And I come and tell them, the method to stop the overturning of rigid structures.
I just tell them to screw the rigid structures to the ground.
If they do this we will have defeated the earthquake because these rigid structures have dynamics without being overturned.
I write history in seismic technology again.
This has surprised everyone because it changes everything.
And when I say everything I mean that it changes all the mathematical calculations that solve constructions today.
It changes the sufficient design of the nodes and the planned plasticity of the structures. And it gives jobs to geotechnicians.
This is why I have enemies and friends for my patent. All civil engineers understand what I'm just saying, very few are trying to adapt to the new research which is based on simple assumptions of engineering. https://www.youtube.com/watch?v=zhkUlxC6IK4
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