4 ms·
Fatigue from what? It's a stationary object housed indoors, not a car or plane that goes through several climatical, temperature and environmental changes to ca
by ChuckNorris89 4y ago
Fatigue from what? It's a stationary object housed indoors, not a car or plane that goes through several climatical, temperature and environmental changes to cause fatigue.
Unless they were subjecting the tank to draining and filling cycles often, it seems more like a design/build fault that was a ticking time bomb from the start.
- Mikeb85 4y agoThe fact an object is stationary doesn't mean forces aren't continuously being applied... Same goes for bridges and every load bearing object.
- ChuckNorris89 4y agoBridges are outdoor subject to weather the forces of wind and the weight and harmonics of vehicles and people crossing them constantly. A fish tank a relatively constant by comparison.
- gsatic 4y agoThe fish were having a race.
- danwee 4y agoGravity.
- ChuckNorris89 4y agoEdited due to incorrect assumption.
- zimpenfish 4y agoI'm no engineer but this would be static fatigue[1], no? "[S]tatic fatigue occurs during prolonged and constant application of stress" (my emphasis) - much like the glass/acrylic at the bottom of a 14m high, 1M litre water column, say. [1] https://en.wikipedia.org/wiki/Static_fatigue https://en.wikipedia.org/wiki/Static_fatigue
- ChuckNorris89 4y agoInteresting I didn't know that. Thanks for sharing.
- jacquesm 4y agoThermal cycling is one option.
- rzzzt 4y agoBuildings move.
- pixl97 4y agoThis here. The earth you live on is not solid, more like a squishy orange. When you build a heavy building on it, the building can sink further. Buildings themselves are subject to the dynamic loads of temperature, wind, their occupants square dancing, and more. Sometimes unexpected loads are added. A new highway or building built into a rock layer near it can subject the previous building to vibration and other forces and cause damages.
- DemocracyFTW2 4y agoThis, and it's in particular true for this very part of Berlin, a city that is well known for literally having been "built on sand", see https://de.wikipedia.org/wiki/Palast_der_Republik#Abriss_zwischen_2006_und_Ende_2008 https://de.wikipedia.org/wiki/Palast_der_Republik#Abriss_zwi... which is about the demolition of the comparatively big building of the Palast der Republik which was just across the street on the other side of the river. That building had to be carefully and slowly dismantled to avoid sudden changes in the hydrogeological (?) equilibrium of the load-bearing layers. Given that amateur seismic stations located 8 and 14 km away from the location were able to pick up a signal from the event[1] of a 1000 tons of water falling to the ground from a height of ~ 2 to 15m, one should image the building itself should have had some sort of influence to its immediate surroundings. [1] https://twitter.com/ErdbebenDE/status/1603654695293263873?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1603654695293263873%7Ctwgr%5Ec56c81b48a00f28a2ac0d9acff6c3f3627bda252%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fwww.kraftfuttermischwerk.de%2Fblogg%2Fberliner-aquadom-geplatzt%2F https://twitter.com/ErdbebenDE/status/1603654695293263873?re...
- jacquesm 4y agoSand is - strangely enough - quite stable. Clay, peat and lots of other substrates are a lot less stable than sand and when building on them you need to take all kinds of precautions to ensure your foundation doesn't one day go for a walk.
- sidlls 4y agoSettlement of the building it's housed in, temperature variations (things contract and expand as temperature changes), random impacts and vibrations (e.g., road traffic, heavy construction nearby), and so on. All of these contribute to fatigue.
- pvaldes 4y agoA tropical aquarium is keep at the same temperature. Unless somebody would disconnect it to save energy or the termostat[s] would fall, shouldn't have experienced a lot of changes in their volume by this.
- fwungy 4y agoThe hotel was required to reduce its lobby heating due to energy sanctions.
- pvaldes 4y agoHum, A graph of the aquarium water temperatures by time would be interesting to examine...
- jacquesm 4y agoThe aquarium was likely very constant (otherwise the fish would die, they tend to be extremely sensitive to variations, especially rate of change), but the surrounding air likely was not.
- pvaldes 4y agoThose fishes can stand an interval of temperature if changed slowly. A main question to check would be if the thermostat was deliberately lowered by the owner in the previous weeks to save energy
- petre 4y agoMaybe the insurance companies could sue the government if this was indeed the case. I would really like to see the bad policy makers go to jail or get hit with huge fines.
- fwungy 4y agoBuilding temperatures were mandated reduced due to energy sanctions. This put stress on an already sensitive structure and caused it to fail.