The Seismic Regulation say that even without an anchoring mechanism, the structures are considered to be anchored to the ground. Right or wrong?
Are the constructions anchoring with the ground Yes or No?
The anchors in the space commit the six degrees of freedom.
The reaction of an anchor consists of one or more component moments.
If these torques are not able to stop the rotation of the walls then it is not anchoring it is a articulation.
At small accelerations the foot girders are able to stop the rotation of the columns.
We know, however, that the pillars are intended to carry only static loads and not seismic ones in which they are completely weak.
The elongated walls, the correct dimensioning per direction and shape of the cross-sections of the floor plan of the walls, and their correct placement in the space, is the correct design that resists seismic shifts.
In an earthquake, the walls lose their eccentricity and their bases are lifted, creating twisting in all of the nodes of the structure. There is a limit to the eccentricity, that is, there is a limit to the surface area of the base which is lifted by the rollover moment. To minimize the twisting of the bases, we place strong foot girders in the walls.
In the large longitudinal columns and walls, due to the large moments which occur during an earthquake, it is practically impossible to prevent rotation with the classical way of construction of the foot girders.
The result is that the foot girders fail and the anchoring turns into a joint with disastrous results for the elements of the nodes.
So the question comes in.
Is there anchoring of the walls at high accelerations or is it turning into a articulation,?
Because if there is a articulation,, then the anchoring of the base to the ground with the mechanism of my invention is imperative.
A ground anchor generally consists of a steel tendon (bar or strands) that is grouted into a pre-drilled hole in rock or soil. After the grout cures, the tendon is pulled into tension against a plate or block and is locked in place to resist movement of a retaining structure.
https://www.rembco.com › portfolio
Ground (Rock & Soil) Anchors - Rembco
Using a sledge hammer (or club hammer for small anchors), force the anchor into the ground, it will rotate when hit and cut a precise thread in the ground. Continue until close to or at ground level.
https://dirtbolt.com
Hammer-In ground anchors | No concrete needed
https://openjicareport.jica.go.jp/pdf/11922267_03.pdf,kindly check this link.
Dear Faraed Salman
The regulations say that even without an anchoring mechanism, the structures are considered to be anchored to the ground. Right or wrong?
I think you did not understand that I am referring to load-bearing structures made of reinforced concrete and not to wooden structures. The bases of reinforced concrete structures are buried in the ground and for this reason they are considered to be embedded in the ground. But this is not true because it does not prevent the wall from turning.
Interesting question , follow for more insightful responses !
Please, see the following helpful link:
https://www.fhwa.dot.gov/engineering/geotech/pubs/if99015.pdf
Dear Jose Roberto Rasi
Thank you very much! I have a better anchor mechanism
Research Proposal Anchoring mechanism for seismic design
Truth cannot be defined & there is no definition of truth . Truth can be merely interpreted & also manipulated & as such the very purpose of truth gets defeated . In judicial court everywhere Truth in the name of God as a path of oath is been taken &that subsequent cannot be measured as a confirmed Truth.
This is my personal opinion
Dear Rohit Manilal Parikh
In Greece, innovation has been cut off from production. When innovative research is based in feudal interconnected regimes and closed societies, most scientists in this state advocate a closed circuit of knowledge that is not open to new learning. They are the gangrene of knowledge and denial of the young in science, and are responsible for the setback of their homeland. For this reason, our children, although educated, go abroad. Science is not fixed, and what is valid today may change tomorrow. Science stands with one foot on existing knowledge and with the other tries to kick and change everything. What we know is written and what we do not know is more and they are waiting for us to invent or discover them. Knowledge is not fixed but it is like quicksand.
Dear Aref Wazwaz I totally agree with you. But in Greece, where I come from, the regulations say different things and other things are true. The new seismic regulation in Greece says that the constructions have anchored in the ground. The truth is that they are simply grounded. I have been trying to explain this to them for years without result!
Dear Mohammed Jaafar Ali Alatabe
Anchoring does not allow any displacement.
In an earthquake, the columns lose their eccentricity and their bases are lifted, creating twisting in all of the nodes of the structure. There is a limit to the eccentricity, that is, there is a limit to the surface area of the base which is lifted by the rollover moment. To minimize the twisting of the bases, we place strong foot girders in the columns. In the large longitudinal columns (walls), due to the large moments which occur during an earthquake, it is practically impossible to prevent rotation with the classical way of construction of the foot girders.
Anchoring does not allow any displacement.
As it allows the turn there is no anchoring. It just rests on the ground or at most you can call it a joint
Dear Mohammed Jaafar Ali Alatabe,
Ioannis Lymperis's explanation are simple and correct.
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