Earthquake zone
The earthquake zone according to DIN 4149 (until 12/2010) is a classification of areas according to their seismic hazard . Attempts to classify earthquake zones across Europe and to base the design of buildings on these zones have led to the development of the European standard EN 1998-1.
Germany
At the moment the classification in Germany is according to DIN EN 1998-1 / NA: 2011 01 National Annex - Nationally defined parameters - Eurocode 8: Design of structures against earthquakes - Part 1: Basics, earthquake effects and rules for building construction (applies in conjunction with DIN EN 1998-1 (2010-12)).
Zones
There are five different zones, namely areas outside of earthquake zones and earthquake zones 0 to 3:
The zone calculation is based on the assumption of an earthquake of the specified intensity with a return period of 475 years. This means that there is a 90 percent probability that such an earthquake will not be exceeded in 50 years.
- Areas outside of earthquake zones: Areas with very low seismic hazard, in which the intensity 6.0 is not exceeded with the probability described above on the European Macroseismic Scale .
- Earthquake zone 0: The intensity reaches a value between 6.0 and 6.5 with the probability described above
- Earthquake zone 1: The intensity reaches a value between 6.5 and 7.0 with the probability described above
- Earthquake zone 2: The intensity reaches a value between 7.0 and 7.5 with the probability described above
- Earthquake zone 3: The intensity reaches a value of more than 7.5 with the probability described above
Values for the assumed lateral accelerations are assigned to the earthquake zones.
Subsoil classes, subsoil classes
The following are also relevant for the construction of buildings :
- Subsurface classes (R: rocky, S: deep-sedimentary, T: transition areas)
- Soil classes (A: unweathered rock, B: moderately weathered, C: loose rock)
Italy
The Italian civil defense distinguishes four danger zones:
- Zone 1 - greatest earthquake risk with the possibility of the strongest earthquakes and a maximum ground acceleration of 0.35 g (this corresponds to a strength of 6 to 7 on the Richter scale; e.g. Amatrice , which was severely affected by an earthquake in 2016, is in this zone)
- Zone 2 - very dangerous, strongest earthquake possible
- Zone 3 - strong earthquakes possible
- Zone 4 - strong earthquakes possible, but rare
United States
The 1997 UBC standard distinguishes four hazard zones (and one zone zero). The most dangerous zone 4 is characterized by a ground acceleration of 0.4 g.
See also
Individual evidence
-
↑ Deutsches GeoForschungsZentrum , DIN EN 1998-1 / NA: 2011-01, earthquake zone
map, map of the earthquake zones and geological subsurface classes for Baden-Württemberg, 1: 350000. Ed .: Baden-Württemberg, Ministry of the Interior. 1st edition 2005.
Earthquake zone. Federal Geothermal Association, accessed on December 24, 2019 . - ^ Deutsches GeoForschungsZentrum, Seismic load assumptions for the desired location
- ↑ Classification of the earthquake zones , accessed September 3, 2016