The reaction of the mechanism to the raising of the roof of the longitudinal column and the opposing reaction of the at the bottom part of the base, divert the lateral load of the earthquake into the strong vertical section.
Lateral spreading mode of ground failure, Loma Prieta Ground shaking triggered soil liquefaction in a subsurface layer of sandproducing differential lateral and vertical movement in an overlying carapace of unliquified sand and silt. However, for the rather pliant systems such as base isolated structures, with a relatively low bearing stiffness but with a high damping, the so-called "damping force" may turn out the main pushing force at a strong earthquake.
That is, the upper plates shift more than the lower ones. It alters their angle from 90 degrees, creating at times acute and at other times obtuse angles.
In the large longitudinal columns wallsdue 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. In order to prevent the lifting of the base, we clamp the base of the structure to the ground using the patented mechanism.
After uniting the tendon that extends from the borehole, with a nut, to lengthen until the roof.
Underneath the base of the structure, we drill a hole into the ground and clamp it with the patented anchor. The ideal situation would be if we could construct a building skeleton where, during an earthquake all the plates would shift by the same amplitude as the ground without differing phases.
A structure is normally considered safe if it does not endanger the lives and well-being of those in or around it by partially or completely collapsing. The initial prestressing applied to achieve very strong adhesion Clamping of the anchor into the walls of the borehole.
Effects of soil liquefaction during the Niigata earthquake Soil liquefaction. The research I have carried out has resulted in the creation of an anti- seismic design for buildings which achieves exactly this result. The resultant effect of horizontal plus vertical loading puts strain on the nodes.
All seismic vibration control devices may be classified as passive, active or hybrid  where: Thus created models are analyzed to evaluate the performance of buildings. According the building construction framework, we exanimate, with experiments, the mechanism of reaction and a patent idea of anti-seismic system with potential conclusions, through using different methods, such as of horizontal seismic insulation, design with elongated rigid columns and design columns without ductility.
Site-specific spectra, and damping coefficients which are applied to the design spectra. Recently, it has been employed under the name of metallic roller bearing for a housing complex 17 stories in Tokyo, Japan.
When used in seismic applications wear is not a problem and there is no required maintenance. Only the rigidity of the floor above combined with the support on the two hidden sides by continuous walls, not penetrated with large doors as on the street sides, is preventing full collapse of the structure.
This type of damper absorbs a large amount of energy however they must be replaced after an earthquake and may prevent the building from settling back to its original position. Snapshot with the link to video clip of a shake-table testing of FPB system supporting a rigid building model is presented at the right.
The horizontal earthquake load exerts a lifting effect on the bases of the columns. It presents also experiments with and without the seismic patent, side by side on screen to compare the seismic protection offered by the invention.
This stresses the beam and has the tendency to twist it in different directions at the two ends, deforming its body in an S shape. And the third method, the prestressed columns do not have ductility, and cannot absorb energy.
The spring on the roof leaves the column to oscillate inside the elastic range while applying seismic damping because it prevents the rise of the roof of the long column.
The ultimate level of kinematic similarity is kinematic equivalence when, in the case of earthquake engineering, time-histories of each story lateral displacements of the model and its prototype would be the same. Seismic design[ edit ] Seismic design is based on authorized engineering procedures, principles and criteria meant to design or retrofit structures subject to earthquake exposure.
Effects of pounding against adjacent building, Loma Prieta Pounding against adjacent building. The notion of similarity rests either on exact or approximate repetitions of patterns in the compared items. This means the loss of life should be minimized by preventing collapse of the buildings.
Past, present and future", J.In general, of construction projects, utility anti-seismic technologies, such as hydraulic tie rod or tie rod structural vibration control system, assess efficiency and safety in node structures from earthquakes risk.
According the building construction framework, we exanimate, with experiments, the mechanism of reaction and a patent idea of anti.
Project The system comprises three major components a sand bed, a pair of concrete slabs, an arrey of springs and shock absorbers. A sand bed seismic absorption system is used to minimize and absorb the seismic waves during an earthquake. In general, of construction projects, utility anti-seismic technologies, such as hydraulic tie rod or tie rod structural vibration control system, assess efficiency and safety in node structures from earthquakes risk.
According the building construction framework, we exanimate, with experiments, the. Jul 22, · anti-+ seismic. Adjective. antiseismic (comparative more antiseismic, superlative most antiseismic) (civil engineering) Built to withstand the effects of earthquakes. Translations.
built to withstand earthquakes. Sep 09, · Patent Idea The patent is the ultimate seismic system that will change the world's seismic design method of construction.
We have invented a method The ultimate anti seismic system. Review of Guidelines for Seismic Design of Structures with Damping Systems [4 EN European Standard, Anti-seismic devices, CEN, European Committee for ASCE specifies that force-controlled elements of the secondary system shall be designed for seismic forces that are increased by 20% from those corresponding to the average.Download