Buildings in Earthquakes: Why do some fall and others don't? (educational)

Ғылым және технология

www.iris.edu/earthquake for more animations
All buildings have a natural, period, or resonance, which is the number of seconds it takes for the building to naturally vibrate back and forth. The ground also has a specific resonant frequency. Hard bedrock has higher frequencies softer sediments. If the period of ground motion matches the natural resonance of a building, it will undergo the largest oscillations possible and suffer the greatest damage.
Dr. Robert Butler (Univ.Portland) gives demonstration of resonance.
Animation & graphics by Jenda Johnson, Earth Sciences Animated
Video demonstration by Dr. Robert Butler, University of Portland
Narrated by NappyT
Guitar solo by Dennis P. McNamara
Science editing by Dr. Robert Lillie (Oregon State University) and John Taber

Пікірлер: 38

  • @marcidorman
    @marcidorman2 жыл бұрын

    Great video! Explanation, graphics, and demo were all very clear. Shared with my family (3 generations) and everyone found it interesting. I love being able to better understand why some types of building are devastated by an earthquake while others remained standing.

  • @kytddjj

    @kytddjj

    2 жыл бұрын

    .

  • @extraterrestrial7424
    @extraterrestrial74247 ай бұрын

    Very well made video. Thanks to it, I learned that structures have a natural resonance frequency and how big of a difference it can make.

  • @Ciubowski
    @Ciubowski Жыл бұрын

    This video deserves more views.

  • @aashishp007
    @aashishp0077 жыл бұрын

    The explanation has clarified all my doubts...Thanks a ton!!!!

  • @valeriewedel2775
    @valeriewedel27752 ай бұрын

    Awesome video - thanks! Bringing this to my commercial construction drawing class.

  • @mvdmusicvideostorefreshthe3224
    @mvdmusicvideostorefreshthe32242 жыл бұрын

    On the Tacoma's Narrow bridge something called 'Vortex Shedding' added to the problem. I love this video though, so thank you for providing it.

  • @ngwilliam5619
    @ngwilliam56192 жыл бұрын

    Very clear demonstrations. Thx

  • @simantsoren1120
    @simantsoren11202 ай бұрын

    I've learned a lot thanks

  • @haominghuang4990
    @haominghuang49906 жыл бұрын

    phenomenal, informative video

  • @NK-iy6if
    @NK-iy6if2 жыл бұрын

    God bless you ! Thank you so much the video has been incredibly helpful.

  • @AndrewNowacki
    @AndrewNowacki4 жыл бұрын

    Great video.

  • @wpegley
    @wpegley2 жыл бұрын

    Great video & thx.

  • @anjalisuresh8896
    @anjalisuresh88963 жыл бұрын

    Very helpful video

  • @handedilhan
    @handedilhan3 жыл бұрын

    Thank you

  • @gehadyasser1001
    @gehadyasser10015 жыл бұрын

    Super clear thnkss a lot

  • @mahendarreddy9862
    @mahendarreddy98622 жыл бұрын

    Very nice video

  • @ranjithalluri604
    @ranjithalluri6047 ай бұрын

    Excellent

  • @deepakchacko5585
    @deepakchacko55852 жыл бұрын

    Superb

  • @satishvenkata1214
    @satishvenkata12142 жыл бұрын

    SUPERB SIR

  • @eeesss9593
    @eeesss95934 жыл бұрын

    great great great one.

  • @fps8093
    @fps80938 ай бұрын

    wow amazing

  • @altaistein
    @altaistein Жыл бұрын

    Who is here watching this video after the earthquakes in Turkey?

  • @priyanshupatel2282
    @priyanshupatel22822 жыл бұрын

    GREAT

  • @SunandGold
    @SunandGold4 жыл бұрын

    Thank you!!!!

  • @RC-RCdesignstudio
    @RC-RCdesignstudio2 жыл бұрын

    The most earthquake-resistant house in Japan is a wall-type RC house.

  • @liboy9844
    @liboy9844 Жыл бұрын

    But not much help if it boils down to luck on which building you’re in and what type of earthquake occurs.

  • @captain6198
    @captain61982 жыл бұрын

    Doesn't the frequency & its amplitude change according to the size of the earthquake? Surely that ground & building structure plays a key role in general durability against collapses, but what about the shockwaves? Surely a magnitude & destruction power of say 5.5 and 7.4 earthquakes can't be the same, also depth is another factor.

  • @mariannamakari9593

    @mariannamakari9593

    Жыл бұрын

    They also change according to the types of soil that the wave meets on its way from the epicenter to the structure.

  • @deemarrero9
    @deemarrero9 Жыл бұрын

    Amazing video, well explained and graphics.. very important to know this, since with all the damages Human Race it's been doing to mother earth 🌍 Earthquakes like those in Turkish it will happening more frequently in the whole word.

  • @kobidkunwar627
    @kobidkunwar6273 жыл бұрын

    Thanks

  • @itziamejia1360
    @itziamejia1360 Жыл бұрын

    what would be the equation of resonance?

  • @danielsmb2635

    @danielsmb2635

    Жыл бұрын

    It is the eigen value of the system; in this case the building system consisting of mass and stiffness…

  • @georgen9755
    @georgen9755 Жыл бұрын

    crest to crest ..period ≤1 sec

  • @georgen9755
    @georgen9755 Жыл бұрын

    ex. Japan 2011 capital e

  • @georgen9755
    @georgen9755 Жыл бұрын

    one wave cycle equals twenty one Hertz

  • @TheOtherSideBooks
    @TheOtherSideBooks2 ай бұрын

    who's here after the Ny Earthquake

  • @chandradeepraut9306
    @chandradeepraut93062 жыл бұрын

    I wanna be civil engineer

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