Here we see in the first video a very strong house with dynamic walls that simply presses against the seismic base just as buildings today simply press against the ground, which at the slightest shift tends to topple over entirely. Why does it topple and not break in two? Because the walls are very strong, stronger than the unsupported loads of the building.
A tipping moment in one direction rotates the building around on itself and another opposite direction moment coming from the now unstable static loads of the building suspended in the air oppose each other. If the cross-sections of the vertical walls can withstand this contrast of moments, then the structure will either overturn or return to its original position intact without damage. If they do not, it will be cut in two.
See video that withstood the two opposing moments. https://www.youtube.com/watch?v=Ux8TzWYvuQ0
If we bolt the same building onto the seismic base or onto the ground, then it will neither topple nor lose its support from the ground so there will be no opposing moment from the unstable static loads since it will not topple. So nothing will happen to it or it will not tip over. See video https://www.youtube.com/watch?v=Q6og4VWFcGA
Now let's remove the strong walls and leave it with weaker corner walls and a beam at the top, and do the same experiment again without bolting it to the seismic base or ground.
We will see after some oscillations that the contrast of the two moments coming from the overturning moment and the unsustainable static loads broke both the beam and wall sections on the node.
https://www.youtube.com/watch?v=l-X4tF9C7SE
Let's now repeat the last experiment with the corner walls and the large beam on the roof but bolting the wall faces to the seismic base or to the ground to see if it will break again as the previous one did.
https://www.youtube.com/watch?v=RoM5pEy7n9Q&t=92s
Not the slightest damage, although the acceleration that shook it was three times the acceleration of the other one that broke.
Conclusion
If we bolt the building to the ground, then even during the earthquake it does not lose the support of the ground so its own unsustainable loads that broke it no longer break it because the ground supports them.
Civil engineers will say that their own buildings don't rise from the ground either.
That is correct.
But they don't lift not because there is no overturning moment in their own buildings but because the weak cross-sections of the beams are unable to lift the structure in the air and they break before they lift it like a reed breaks when a big fish bites it.
The house is not destroyed by the earthquake but by its own weight resisting the rotation of the momentum.
If you bolt it to the ground the overturning moment is deflected into the ground and the structure will not be damaged.
If the fish bites a little then the reed beam will get away with it due to the fact that it has some elasticity.
If the bite is sharp and strong it will break
Dear Doctor
I chose the following quotations hoping nice participation to this up-date discussion as earthquakes nowadays occur more and more.
"Earthquake engineers are working to make roads and buildings safer in the event of major earthquakes. This includes both improving the design of new buildings and bridges as well as strengthening older units to incorporate the latest advances in seismic and structural engineering. "
"Although you may hear the terms “seismic zone” and “seismic hazard zone” used interchangeably, they really describe two slightly different things. A seismic zone is used to describe an area where earthquakes tend to focus; for example, the New Madrid Seismic Zone in the Central United States. A seismic hazard zone describes an area with a particular level of hazard due to earthquakes. Typically, a high seismic hazard zone is nearest a seismic zone where there are more earthquakes, and a lower seismic hazard zone is farther away from a seismic zone."
"Published maps will only provide generalized, uninterpreted information about specific areas. Every property consists of a unique combination of geologic and structural factors that must be considered to determine what might happen to a house during an earthquake. Therefore, an individual site study is necessary. Geologic factors include: type of underlying material, depth to bedrock, depth of groundwater, and slope of land. Structural factors include: materials used (wood or masonry) in construction, number of floors, design, and retrofitting present.
As a publicly-funded organization, the U.S. Geological Survey conducts regional hazard assessments in conjunction with State and local agencies. We provide information that is used by planning officials to mitigate hazards. The USGS does not undertake assessments of individual private property. Site studies must be arranged by the owner of the property with geologists or engineers in private practice. To locate a qualified professional, contact your State government to determine its certification or licensing requirements for professional geologists and engineers in private practice. State boards of registration maintain lists of individuals who meet requirements established in their State. A local real estate company may also be able to recommend a qualified professional."
Hello dear Sandus Hantoosh. Very grateful for having shared this knowledge, which is of interest and affects everyone; Because from the sciences we want to make the transition through people's lives and the conservation of their property more viable, in the face of atmospheric events such as, often unpredictable ones, such as earthquakes. With great pain we have seen the havoc caused in Arab countries and in general in almost all countries in which these natural phenomena occur relatively frequently. The events that occurred in Turkey and Syria hit us hard, just to mention two, tens and thousands of deaths, missing people, destruction of buildings of all kinds destroyed, which leaves behind a trail of pain, suffering, loneliness, discomfort, hunger, misery. , violence and impact on people's quality of life, often insurmountable, if not the triggering of mental illnesses, an evasive increase in the consumption of substances of abuse, suicides, among others. I think that the way you make these notes, they reach very deeply and very clearly to each one of us, who we admire, the extremely important work that you carry out, also serves to prepare humanity psychologically, so that they continue to strive to care for the environment. Planet Earth, because our planet is threatened and constantly protests, seeing everything on the planet threatened with the exacerbation of all the natural phenomena that occur every day on Earth. Thank you very much colleague for taking care of Pacha Mama and for taking care of us all. Congratulations!!!
THANK YOU, THANK YOU VERY MUCH DISTINGUISHED SCIENTIST
Hello dear LOANNIS lIMPERIS. Very grateful for having shared this knowledge, which is of interest and affects everyone; Because from the sciences we want to make the transition through people's lives and the conservation of their property more viable, in the face of atmospheric events such as, often unpredictable ones, such as earthquakes. With great pain we have seen the havoc caused in Arab countries and in general in almost all countries in which these natural phenomena occur relatively frequently. The events that occurred in Turkey and Syria hit us hard, just to mention two, tens and thousands of deaths, missing people, destruction of buildings of all kinds destroyed, which leaves behind a trail of pain, suffering, loneliness, discomfort, hunger, misery. , violence and impact on people's quality of life, often insurmountable, if not the triggering of mental illnesses, an evasive increase in the consumption of substances of abuse, suicides, among others. I think that the way you make these notes, they reach very deeply and very clearly to each one of us, who we admire, the extremely important work that you carry out, also serves to prepare humanity psychologically, so that they continue to strive to care for the environment. Planet Earth, because our planet is threatened and constantly protests, seeing everything on the planet threatened with the exacerbation of all the natural phenomena that occur every day on Earth. Thank you very much colleague for taking care of Pasha Mama and for taking care of us all. Congratulations!!!
Thank you very much Ph. D. Gabriel Lajús Barrabeitg!
Scientists like you give me courage to continue my work!
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