The new seismic technology aims to solve all the existing problems of structures that occur during large seismic ground accelerations.
It applies artificial compression at the ends of all longitudinal reinforced concrete walls between the nodes of the top level and the base, and footing in the foundation soil using expandable anchorage mechanisms.
Artificial compression at the sides of the wall using free-passing hydraulic tendon tensioners through passage tubes achieves
1.To reduce the bending moment and torsional bending 2.To reduce the tensile stresses. 3.To increase the active cross section of the wall to all stresses 4. To increase the strength to base shear ratio 5.To eliminate the shear failure of the concrete coating which occurs at the interface of the two materials along the steel bars, due to the super tensile strength of the steel and the low shear strength of the concrete. 6.To reduce the moments at the nodes. 7.Concrete only takes compression where it has super specifications and steel only takes tension where it has super specifications, and this prevents premature failure from other stresses that are outside the specifications of the two materials.
Basically the artificial compression increases the strength of the cross section to tensile the base shear and shear since it increases the active cross section without increasing the mass which increases the inertia and cost, creates stiffness which reduces the deformation which creates the cracks in the wall faces, and prevents the creation of moments in the cross sections around the nodes.
However, a stiff dynamic wall downloads large increased moments to the base which are deflected at the beams and tie beams of the bases and easily break their cross-sections.
For this reason, the deflection of the wall overturning moment towards the nodes must be prevented.
The embedment of the prestressing tendons in the foundation soil deflects the wall overturning moment into the soil, largely preventing the transfer of moments to the nodes.
Transferring the inertial stresses of the structure to the ground means that they are removed from the cross-sections of the nodes. The ground reacts as an external force to the structure's response to seismic displacements by taking up most of the stresses. The footing from the top of the walls combined with the artificial compression of their sides and the simultaneous footing of the tendons with the ground stops the deformation of their frame and their overturning moment, diverting these tensions into the ground on the one hand, preventing the deformation of the nodes on the other hand, while increasing the bearing capacity of the foundation soil and the concrete cross-sections towards all tensions. Controlling the deformations originating from the bending moment and preventing the wall overturning moment means preventing inelastic displacements and collapses even when there is structure ground resonance, because the ground as an external force controls the displacements in each seismic loading cycle.
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