Quote:
Originally Posted by scalziand
You might be interested in this.
2 meters wall of new UBC concrete withstood nearly triple the strongest quake ever recorded
The material is called an eco-friendly ductile cementitious composite (EDCC) and is so strong and flexible that it acts like steel, bending during an earthquake instead of crumbling like concrete.
Walls that are sprayed on both sides with the material performed so well in seismic tests that UBC engineers dubbed it the ‘unbreakable wall.’
Soleimani-Dashtaki had to turn the dial to three-times the magnitude of the strongest earthquake ever recorded in order to break down a two-meter wall of EDCC in seismic tests.
The technology developed at UBC will cut retrofit costs in half, added UBC civil engineering professor Nemy Banthia, who supervised the EDCC project. |
Thank you, it's a very interesting article!
My patent reacts differently. With the method of designing, clamping the top-level nodes with the ground, I hope to divert the lateral inertial stresses of the earthquake into more powerful areas of the structure than those currently driven. These strong areas have the ability to absorb these tensions (preventing and relieving the relative displacements (ie drifts) and thus the tension that develops throughout the vector is limited) and returning them to the soil from where they came by subtracting in this way, great tensions and failures over the load-bearing structure of the building while ensuring a stronger bearing capacity of the foundation soil. With the appropriate design of wall dimensioning and their placement in suitable locations, we also prevent the torsional buckling that occurs in asymmetrical and metallic high-rise structures. Basically, when the roof is connected to the ground through the patent rope, it limits the displacements of the floors (ie the drifts) and thus the intensity, which develops throughout the carrier, is limited.
MEASUREMENT OF ACCELERATION, POWER (F), Moment of inertia
See this video that has frequencies on the screen The 7 Hz frequency is ghosting at the frequency that my experiment had towards the end of the video.
video with frequencies
https://www.youtube.com/watch?v=2c8qtIduEHM
My own experiment. The higher frequency is after 2.40 seconds and frequency is queried at the 7 Hz frequency of the other video
https://www.youtube.com/watch?v=RoM5pEy7n9Q
So ... In a natural earthquake I did the experiment with a 0.22 cm oscillating amplitude and a frequency of 7 Hz we have ... a = (- (2 * π * 7) ^ 2 * 0,22) / 9.81
3,14x2 = 6,28x7 = 43,96x43,96 = 1932,4816x0,22 = 425,1460 / 9,81 = 43,34g natural earthquake
The specimen in the experiment had a general mass weighing 850 kg. The second floor because of the inverted beam it carries is more pounds than half so I would say it is about 450kg and the ground floor is 400kg So to find the inertia force F first on the ground floor we say ...
F = m.a 400x425 = 170,000 Newton or 170 kN.
and the first floor 450X425 = 191250 Newton or 191.25 kN.
Total force F (Inertia) 170 + 191.25 = 361.25 kN
Moment of inertia
Strength X Height ^ 2
Ground floor 170X0,65X0,65 = 71,825 kN
First floor 191,25x1,3x1,3 = 323,21 kN
Total Inertia Torque 71,825 + 323,21 = 395 kN
The axial loads N (kN) of the vertical tendons for the following cases of virtual residential buildings are provided in a table, in order to deal with a very strong earthquake:
A. Case Design of a building 10.00m × 10.00m, square with nine (9) columns on a 5.00m grid and eight (8) tendons (see Figs A1, A2).
A.1 Ground height 3.50m
A.2 Two-storey, total height 7.00m
A.3 Three-storey, total height 10.50m
A.4 Four-storey, total height 14.00m
A.5 Five-storey, total height 17.50m
A.6 Ex-storey, total height 21.00m
B. Case Plan of a building 20.00m × 20.00m, square with twenty-five (25) columns on a 5.00m canvas and twenty-four (24) tendons (see Figures B1, B2).
B.1 Ground floor height 3.50m
B.2 Two-storey, total height 7.00m
B.3 Three-storey, total height 10.50m
B.4 Four-storey, total height 14.00m
B.5 Five-storey, total height 17,50m
B.6 Four-storey, total height 21.00m
https://s2.postimg.org/r817dnh6x/DSC04323.jpg
https://s2.postimg.org/v4ej9qhmx/DSC04322.jpg
https://s2.postimg.org/euod6dh49/DSC04321.jpg
https://s2.postimg.org/7rghqxjg9/DSC04320.jpg
https://s2.postimg.org/ll4ug5jt5/DSC04319.jpg