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Old Posted Nov 1, 2020, 10:49 AM
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Method and mechanism of seismic force deflection.

A reinforced concrete wall, when its trunk is bent, one side is compressed and the other is stretched. That is, one side shrinks and the other grows. There is a point in its cross section where compression and tension have the maximum force. This point is the critical failure area. This point is responsible for the brittle failures of the structures in the earthquake. If we stop the wall bending we will eliminate the critical failure area. Is there a design method to stop the bending and the critical failure area? Yes there is. As we said the stretching side grows. If with an unrelated tendon we apply transverse compressive forces, at the highest level of the cross-section of the wall side, (on the stretching side) greater than the tensile forces then we have stopped the bending and the critical failure area. One problem was solved. Fine now we have a rigid wall in terms of the lateral force of the earthquake without a critical failure area. Like a rigid wall that is, its overturning moment will be transmitted through the nodes where it is connected to the beams, on their trunks and after bending them easily as rigid as it is, it will break them. Another problem? There is a solution? Yes there is. If the protruding unrelated tendon that stops bending does not stop at the base foot of the wall, but extends and anchors into the ground, then the forces of the earthquake are deflected into the ground. The knots will not present great torques, capable of breaking the beams. For this reason I do not connect the base sole with the ground but I join the upper ends of the sides of the walls with the ground with tense tendons without relevance. The reason is that with this method I stop both the torque of the joints coming from the bend, and the critical failure area of ​​the wall. The critical failure area of ​​the walls is created in the cross section of the wall which is close to the base. This creates a potential difference in the adhesion of the reinforcement and the concrete. With the method of the invention, the tense unrelated tendon which is both anchored to the ground and the upper end of the wall, there is no potential difference or critical failure area. The problem of deformation with fringe failures is solved! In addition, the imposition of compressive stresses on the cross-section of the wall succeeds in increasing the strength of its cross-section in the developing shears, increases the active cross-section, improves the trajectories of the oblique tensile force and reduces the cracks. The ground anchor mechanism increases the strength of the ground so that it can accept higher compressive loads.
As we see in the figure
The earthquake forces an accelerated displacement at the base of the structure on (A) The structure refuses to follow the accelerated displacement thus creating a force in the opposite direction of this inertia the (B) The force (B) directs to the joint (1) which goes to rotate the wall. During the rotation the upward force is created (2) This force is received by the tendon (3) and sent to the ground.
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