빌딩 붕괴를 막아낸 한 대학원생의 질문

The building is collapsing! Some of the audio is missing from the video, so I'm reuploading it! The link below is a short article about additional research and stories I found while making the video. I'd appreciate it if you'd read it as a column! I plan to write an article for each video in the future. https://cafe.naver.com/yanerd?iframe_... If you look closely at the photos of the City Corp construction, you might notice that several of the V-shaped middle columns are still there. These columns prevent the braces from bending and collapsing, and help support the loads of the upper floors. However, they don't support the majority of the gravity load. Therefore, I omitted these columns from the diagram illustrating the load transfer path. For more information, please refer to this document. https://drive.google.com/file/d/1ODFo... ▀▀▀ 0:00 Why is the Citycorp Building built on columns? 4:44 Wind load? 7:49 Tuned mass damper 11:17 Anonymous graduate student 14:00 Quartering wind 18:38 Probability of building collapse 20:31 Building repair methods 25:40 Hurricane Ella is coming...! 27:00 The spread of TMD 28:36 The untold story behind it. ▀▀▀ A big thank you to the incredible people without whom we couldn't have done this! 🖤 To Michael Greenburg, author of The Great Miscalculation, for his insights that truly brought the story and its context to life. He gave us a pre-copy of his upcoming book, and it is fantastic: https://ve42.co/Miscalc To Eric Hines for all his help with the technical details, fact-checking, and making sure we got the engineering right. To Michael J. Vardaro for helping us uncover the details of the story and the resources he provided. To Brock Hedegaard for helping us dive deep into the Citicorp structural analysis. Learn the fundamentals of structural analysis on his brilliant channel, @StructuresProfH, and see here for his analysis of the citicorp center; • Analyzing the Citicorp Tower: A Structural... To Michele Barbato from UC Davis for his inputs on the load calculations. https://faculty.engineering.ucdavis.e... Matt from @mvvvc for talking us through his wind load analysis. To Prof. Chris Letchford who helped us understand the impact of wind on Citicorp's structure. To DongHun Yeo from NIST for discussing his research about wind effects on buildings similar to citicorp: https://ve42.co/WindLoad Finally, to Team Columbia —who built the epic TMD and ran wind tunnel experiments that made this story come alive. This includes the folks at the Mechanical Engineering Teaching Laboratory (Follow all the cool stuff they’re doing: @mechcu, @columbiaengineering or visit https://teachinglab.me/) Amanda Lombardo, Manager of Instructional Laboratories Daniela Durón García, Assistant Manager of Instructional Laboratories Jorge Casas, Machinist And the amazing seniors from the Columbia Space Initiative: (Support their awesome work here: columbiaspace.org/support-us/, Follow them: @columbiaspaceinitiative) Michael Sheehan Claudio Solano Jessica Bolar Kathryn Lampo ▀▀▀ References: Michael M. Greenburg. The Great Miscalculation via. nyupress.org - https://ve42.co/Miscalc Joe Morgenstern. The Fifty-Nine-Story Crisis via. The New Yorker - https://ve42.co/59Crisis National Academy of Engineering. William LeMessurier-The Fifty-Nine-Story Crisis: A Lesson in Professional Behavior - • William LeMessurier-The Fifty-Nine-Story C... Diane Lee Hartley. Implications of a Major Urban Office Complex: The Scientific, Social and Symbolic Meanings of Citicorp Center via. princeton.edu - https://ve42.co/CitiSymbol Caroline Whitbeck. William LeMessurier: The Fifty-Nine-Story Crisis, A Lesson in Professional Addition References here: https://ve42.co/citiref ▀▀▀ Special thanks to our Patreon supporters: Adam Foreman, Albert Wenger, Alex Porter, Alexander Tamas, Anton Ragin, Autodidactic Studios, Balkrishna Heroor, Bertrand Serlet, Blake Byers, Bruce, Dave Kircher, David Johnston, David Tseng, Evgeny Skvortsov, Garrett Mueller, Gnare, gpoly, Greg Scopel, HydrochloRick, Jon Jamison, Juan Benet, Keith England, KeyWestr, Kyi, Lee Redden, Marinus Kuivenhoven, Matthias Wrobel, Meekay, Meg Noah, Michael Krugman, Orlando Bassotto, Paul Peijzel, Richard Sundvall, Sam Lutfi, Tj Steyn, TTST, Ubiquity Ventures, wolfee ▀▀▀ Written and Directed by Sulli Yost Edited by Trenton Oliver Additional Editing by Axel Oliver, James Horsley and Peter Nelson 3D Modeling by Maydelis Anaya Romero Animation by Mike Radjabov, Andrew Neet, Fabio Albertelli, Jakub Misiek, and Emma Wright Illustration by Jakub Misiek, Maria Gusakovich and Cainejan Esperanza Filmed by Sulli Yost, Henry van Dyck, Andrew Abbale, Derek Muller Produced by Sulli Yost, Derek Muller, Casper Mebius, Zoe Heron, Rob Beasley Spence and Tori Brittain Additional research by Geeta Thakur Thumbnail contributions by Ren Hurley and Ben Pow...