Earthquake Simulator vs Wood Skyscraper - Engineer Explains
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- Опубликовано: 21 май 2024
- Structural engineer simply explains how the world's tallest earthquake test will change wood construction forever. This mass timber skyscraper is the tallest building to ever be constructed and tested on the world's largest outdoor earthquake simulator (shake table) at UC San Diego. How the new mass timber rocking wall technology will make buildings nearly earthquake proof.
NHERI Tallwood Project:
nheritallwood.mines.edu/index....
NHERI Large High Performance Outdoor Shake Table Test Videos:
/ neesucsd
📗 Chapters 📗
0:00 Tallest Mass Timber Building Earthquake Test
0:31 What are Structural Engineers?
0:54 World's Largest Outdoor Shaketable/Earthquake Simulator
1:33 Why Wooden Skyscrapers & Mass Timber?
2:22 Rocking Wall Technology - Earthquake Proofing the Building
3:10 Rocking Wall Engineering
4:05 Rocking Wall Demo Model
4:52 Problems with Typical Concrete and Steel Buildings
6:04 EARTHQUAKE TESTS for Comparison
6:54 Mass Timber EARTHQUAKE TEST
7:38 Results of Earthquake Testing
8:28 Mass Timber's Future and Challenges
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Mat Picardal is a structural project manager at DCI Engineers. This video and this channel does not necessarily reflect the opinion nor beliefs of DCI Engineers. All thoughts expressed are purely his own observations and experiences.
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#structuralengineering #civilengineering #masstimber
How do you feel about earthquakes and fires in a wood skyscraper?
I don't think wood has the strength for buildings that high. Not to mention the amount of wood you need. BTW, how would you analyze seismic load? I used to 1.0/0.7 one way, but we are using 1.0/0.3/0.3 three way now.
I can't express how much I love this video, the new idea, and the concept. Maybe this is the beginning of the new structural system and connection that allowed the absorption of seismic force rather than the fight and damage that you mentioned. It will be good if this concept can be done for concrete and steel materials also. Maybe we need to do more research on connection types.
I appreciate for making this type of amazing content for this profession. Thanks, Mr. Mat Picardal!
💝Love from Bangladesh. Wish to meet you one day and learn something new. Sending you best wishes for an amazing journey ahead!
I DONT AGREE SIR , IN WHAT YOU QUOTED THAT RC BUILDINGS CANT BE RESILIENT THAN WOOD STRUCTURES ,, ,
IF YOU WANT TO HIT RESILIENT DESIGN IN ANY KIND OF STRUCTURES,
YOU HAVE TO ABSTAIN IN THE IDEA OF ELASTIC DESIGN .. . YOU DONT HIT THE TRUE RESILIENT DESIGN , COZ YOU ALWAYS GO BACK TO THE IDEA THAT STRUCTURES MUST BE DESIGN IN ELASTIC MECHANISM .. .
Mat I've sent you a message on Instagram for months no reply
They demonstrably stand up to quakes.
Actually, in a fire, the structural members' surfaces char, but the structural members don't distort. Steel does. Wood wins here.
Producing steel or concrete makes a massive amount of CO2, wood is literally made of CO2, water and sunlight.
Woo!
I designed the tallwood foundations and got to see the testing live. Hope the tech comes to mainstream soon! Pretty cool topic to cover on your channel, well done!
Carson, your concrete footing is also quite resilient:)
There is a large mass timber project here in lake union Seattle (Northlake commons) thats been really cool to watch. I love these buildings. I trust them completely. I especially trust this design with the wood spine, wood is super resilient. Im curious about how it is to work with during construction as the wood warps and changes size due to water exposure. Not that it hurts the integrity but just knowing wood isn’t perfect no matter how you cut and glue it, and scaling that up in a full size wood tower.
Awesome that you were able to check it out. Cheers Matt!
Congratulations! You got the SE
Thank you for creating this and putting it out there, those rocking walls are lit
Thanks Mat for this wonderful video!
love the video! looking good Mat!
Excellent. I'm going to have my Wood Design students watch this. I actually did my master's thesis on a post-tensioned rocking wall system in 2006.
I love the demonstrations!
BEAUTIFUL VIDEO , HI from Peru!, and really good information about new resilient buildings!
Great job Mat and ShiLing!
Great video Mat! Seems there are strong possibilities for higher timber construction....yes I would also feel like a kid in a toy store if I was there. Lucky you.
Malik from Barbados.
It’s been awhile Mat
Nice video
Thanks for the support, been on a break to improve my health, physically and mentally.
Regarding fire, while it's true massive timber withstand fire pretty darn well, it still takes a higher toll compared to concrete for instance. I love wood houses and the esthetics they provide and there's a lot of options to not have fires started at the first place. But at the end of the day, I think timber, concrete and steel can work together rather than replacing each other to achieve even better and more tolerant and sustainable constructions.
absolutely great job on this video Mat. Can you send links to the other material shake table tests?
Thanks Dean, I updated the description with links to shake table videos: ruclips.net/user/NEESUCSDvideos
It is my topic research at Lehigh University.. well done this video
so cool!
I'm a plumber not an engineer but imagine you need to service those cables but that is still cheaper than building a building. I'm curious how the wood will hold up over the long term with all of the flexing it can do. I imagine wood is also more sensitive to environmental factors over time like moisture and temperature and even living organisms. It's a cool idea in the works though. I also prefer to have to set anchors into wood rather than metal so, there's that.
Praying for a mass timber revolution.
Nature proving once again that its made the best materials
GREAT video. i use post tensioning vertcal external tendono for church, Bell tower and other slender heritage Wall (in Italy existing building are my core business. i live in venice).
i have some questions:
1) how the rocking Wall Is restrained at the base. "hinge"? for rocking?
2) you have, for gravitational load, a big Mass wood column, and for laterali load a kind of RC section (rebar are the tendons)...correct?
3)why tendon are not fully centrifugate ? the are not near the Edge of the section, they looks like near the neutral axes
4)if i want to use spectral modal analysis, what value of "behaviour factor" you can use? there Is some documentions? or it's pure research for now?
The researchers had analytical models beforehand to compare results, and they're probably finishing their research papers on this test soon to help answer these questions.
@@MatPicardal thanks. can you update us (if you want) when they delivery the analytical model and the papers?
I’m curious about how wood used in the main support in tall buildings would last over time. Would it degrade faster in tall buildings compared to steel?
Mat losing weight!!! 🔥🔥🔥
Its awesome,
But what about water exposure?!
Also what is gonna happen if some crazy guy picked up his saw to get firewood for heating 😅
Finally, I missed you
Thanks for the support, been on a break to improve my health.
@@MatPicardal totally valid, I support that
Gona need a great deal of fire proofing
😍
What about chemicals of covered that wood for testing for heavy rain and humans health safety? Also, kids more likely will be linking that wood. How long that chemicals smell will be go away? People want seeing some exposed wood instead of full covered glass window.
I think tall wood is stupid.
From an engineering challenge perspective its cool yes.
We should focus on modular timber as well as speed of construction. We know what building types timber makes sense for.
I'm curious how alternative issues are resolved. (sound, fire) considering the cost of this system. In addition is there any reason one can't do a rocking wall in steel?
North of a certain amount of stories its not a very good material as member sizes eat into leasable space.
You lose weight sir! Haha
Great video Mr. Picardal. What take you so long to post new videos? I graduated with a Bachelor degree in Civil & Environmental Engineering in October 2021. Currently working in consultancy firm as a structural engineer in Bangladesh. What disappoint me most is that the owner of the company tells me that I know nothing and everything I do is wrong. But actually I do what my supervisor tells me to do. But when I tell this to owner he always yells at me and scold me very badly.
I've been focusing on my health and hobbies the past few months, but I've been missing making videos. Thanks for the support! And yeah, mind your environment, it's more of an apprenticeship industry and you shouldn't be expected to know everything immediately, but you should know the engineering basics, such as statics.
Thank you for your kind reply Mr. Picardal. I would really like to talk to you sometime. The way you are helping the engineers is really praiseworthy
How many CO2 absorbing trees taken out of the forest does it take to build a high rise? Should be able to clear out the rainforest in a years worth of construction in just a couple cities.
Master the concepts of Practical Civil Engineering here and Work for Top Construction Companies of the World!
And what exactly is it rolling on cause that tube definitely doesnt look like marbles😂 just looks like a big ass rubber cylinder