Inside the room, secure a space where the earthquake shelter can be installed.
Since the material is lightweight, heavy machinery is not required.
Assemble the floor panels
First, set up the flooring.
Anchor the floor panels
Affix the floor panels to each other using flat bars and the surroundings using SF material (SUS's square, standard structural material).
Install the steel angles
Attach the steel angles around the perimeter of the floor to anchor the wall.
Install the wall frames
Attach the wall panels and the wall framing for the opening.
Affix the corner sections using steel angles, and all other parts using flat bars.
Install the steel angles on the upper wall
Attach steel angles to the upper part of the wall for the installation of roof panels.
Install the roof panels
Install the roof panels.
Install the trusses
Attach the trusses to the roof panels.
Fasten the trusses
Affix the trusses using angle brackets.
1. Shaking just the earthquake shelter
We sent seismic waves with the same intensity as the Great Hanshin Earthquake with 4 tons of load in the structure. We found the earthquake shelter shook within the elastic range and possessed sufficient yield strength even after the experiment.
2. Wooden house + earthquake shelter
We found that when wooden houses were combined with earthquake shelters and seismic vibrations were sent the same way, deformations were smaller or nearly equivalent to having just wooden houses. The yield strength increased about 3 times with the inclusion of an earthquake shelter. Thus we can expect a prevention of seismic collapses in residences that use earthquake shelters.
3. Change the direction of input seismic waves
In tests 1 and 2, the direction of input seismic waves was set along just one axis (X-direction). However, when we converted this over twp axes (X and Y directions), the vibrations damaged the joints between the pillars and the base of the wooden house, and the house collapsed onto the shelter. However, the earthquake shelter had no problem taking on the extra vertical load and incurred no serious damage.