Quote:
Originally Posted by Zerton
It must have reached structural resonance due to the conditions that day. Not good. If that's true it will require some extensive modifications.
https://www.timeanddate.com/weather/...nzhen/historic
At 1pm on Tuesday in Shenzen it looks like there were sustained 20 mph winds. That still shouldn't be enough to shake a tower like this unless it was in resonance. |
Resonance is interesting- this is a 20 year old building, has this happened to it before? If not, then what has changed in its environment between now, and the last time it experienced these same wind conditions? (Same speed, same direction, etc). If it's never had these issues before, it could mean that something new built nearby is changing the way wind affects it- wind tunnel studies show how wind will affect a proposed building, but I'm pretty sure they don't say "Well, your building will hold up fine, but it's going to alter wind behavior in the area and potentially fuck up your neighbor by giving it resonance issues it's never had before!"