Latest standards:
Houses can withstand earthquakes of magnitude 6-7 without collapse;
The business building can withstand an earthquake of magnitude 8;
The service life can exceed 100 years.
From a legal point of view, it is difficult to circulate building materials without official certification, and only buildings that meet the bill are eligible for approval, thus ensuring that every building in Japan meets the seismic standards.
Secondly, in terms of earthquake resistance, Japanese building structures are mainly divided into three categories.
1. Anti-seismic structure: able to withstand ground vibration.
2. Seismogenic structure: It can absorb seismic energy and reduce vibration and impact.
3. Earthquake-free structure: It can vibrate with it to a certain extent, and it is difficult to convey the sense of earthquake.
Now most new buildings will use earthquake-free structures.
Finally, talk about Japanese building materials.
In Japan, the brick structure almost disappeared and was replaced by reinforced concrete structure supplemented by light wall materials. This structure is safe, earthquake-resistant and energy-saving.
In recent years, the mainstream building materials of Japanese houses are wood, light steel, steel, reinforced concrete and composite materials. Seismic performance
Steel structure > wood structure > reinforced concrete structure
On the other hand, compared with foreign investors who are much more critical, it is definitely Japanese domestic investors who are more worried about the earthquake. Now the Japanese are constantly studying new technologies and materials, which will improve the seismic level of buildings again and again.
Although we have repeatedly emphasized new technologies and materials, investors' concerns are not superfluous. Japan's earthquake insurance system is very perfect, and investors hope to get peace of mind, and they can fully insure their houses, so as to get better protection.