AN ALTERNATIVE APPROACH TO BUILDING STABILITY
FIRST PLACEMENT METHOD
The patented video shows the mode of operation and method of collaboration of the antiseismic system, with bearings, which offers effective seismic isolation of the vertical and horizontal axes of a structure so that buildings repairs are avoided to the greatest extent following an earthquake:
http://www.youtube.com/watch?v=KPaNZ...layer_embedded
http://www.postimage.org/image.php?v=PqdfyhS
http://www.postimage.org/image.php?v=gxKi2JJ
http://www.postimage.org/image.php?v=PqdfPKS
http://www.postimage.org/image.php?v=Pqdg6cS
http://www.postimage.org/image.php?v=PqdgiGA
SECOND PLACEMENT METHOD
http://www.postimage.org/image.php?v=PqdjPGi
There is another method of placement of the hydraulic traction mechanism in building structures.
This method does not include horizontal seismic isolation,
Or bearings
Or gaps
We simply convert sections of the internal brick-built walls of the building to walls consisting of reinforced concrete which have the same continuation on all of the floors. We insert these at carefully placed low pre-stress points between the bore hole and the hydraulic mechanism on the roof.
What we achieve with this method:
a) If the skeletal framework of a building tilts by a few degrees due to oscillation created by an earthquake, do the corners of the framework nodes have the possibility to remain at 90 degree angles?
Of course not,
Why not?
Simply stated, because the skeletal framework has a static load. During oscillation the nodes are required to take the force, but they cannot withstand this so the corners change shape, and, from right angles, some become greater and some lesser than 90 degrees. This results in slanting or bowed cracks in the corner nodes.
If the corners do withstand the static load so that they remain as right angles, logic tells us that the front and back columns will alternatively raise each other off the ground during oscillation. This, though, is impossible because the bearing element is full of nodes and static loads.
b) If the oscillation creates the above problems on the nodes, wouldn’t it be best if we can prevent this? And if so, how can we achieve this?
c) Another option might be to bind the building all around with steel cables at 45 degrees and anchor them (something which is impossible in practice).
Alternatively, we could take a portion of the structure, for example the internal walls and replace them with reinforced concrete and anchor these with the ground at appropriate points. In this way oscillation is prevented by bringing about resistance with roof, the connecting columns and the foundations of the structure.
Why do I recommend that we convert the internal brick walls to reinforced concrete and to anchor these with the ground?
For the following reasons:
a) So that the external walls are fully available for placement of doors, windows and glass panelling.
b) Because the internal walls due to their architectural nature have a cruciform shape and this dimensional form creates greater resistance to an earthquake from whichever direction it comes.
c) Because the formwork can be placed and removed easily.
d) Because dimensionally they are capable of withstanding the tendency to bend.
e) Because they have a superior dimensional plan and are capable of creating greater resistance in the chambers and columns.
In the diagrams below we illustrate the conversion of brick walls to reinforced concrete as well as the anchor points necessary to prevent oscillation of the building which strains the nodes of the structure creating slanting cracks:
http://www.postimage.org/image.php?v=PqdjPGi
Placement in underwater roads:
http://www.postimage.org/image.php?v=Pqdi7q9
Placement in continuous brick- based structures:
http://www.postimage.org/image.php?v=PqdhLYS
Placement in subordinate and wooden houses for protection from both earthquake and hurricane damage:
http://www.postimage.org/image.php?v=PqdgP6r
Placement in a dam:
This system can also be placed in bridge pylons under the bearings.
HOW WE STOP THE OSCILLATION OF THE STRUCTURE
By applying prestressing with the hydraulic traction mechanism between the drill hole and the top of the structure via the vertical supports. This prestressing not only improves endurance against shearing, but there is an additional advantage.
During inertia tension of the bearing element, oscillation is brought about. At the prestressed vertical support, two opposing forces are created. One in the pressure chamber and the other in the vertical column and it’s foundation as a reaction to the oscillation. Within the body of the vertical support these two opposing forces created act in resistance against the earthquake.
This resistance is in addition to the resistance already present in the nodes of the structure and acts against the catastrophic power of the earthquake.
We can exert prestress on the vertical elements in two ways:
a) normal prestress or
b) controlled lesser prestress.
If the preferred elements are able to withstand the stressing we apply the normal pre-stress. If they cannot, then we apply the controlled lesser prestress.
Greater prestress is applied initially, the moment we have sunk the traction mechanism in the drill hole, prior to construction of the support structure.
And afterwards, when we have anchored the steel cable with a wedge at ground level at the foundations, we fill the drill hole with concrete prior to constructing a pile. Then we continue the construction and when it is completed we undertake a simple pre-stressing of the upper chamber and foundations.
That is, the same steel cable will receive two pre-stresses. One initially between the ground surface and the anchor, and a second one between the foundations and upper chamber, with differing tensions.
With this method we have other benefits such as:
Compression of the ground (prior to the construction of the pile), protection of the mechanism from rust and avoidance of water extraction which may be present in coastal areas.
We can control the anchorage of the structure, with as much prestress or anchoring as is needed, since the prestress underneath the foundations will have a greater intensity than the subsequent prestressing of the foundations of the structure.
SITE
http://www.antiseismic-systems.com/index.php?lang=en