Тёмный

How Trusses Work! (Structures 5-1) 

Paul Kassabian
Подписаться 47 тыс.
Просмотров 807 тыс.
50% 1

We can combine tension and compression elements to form trusses that span further than the pieces from which they're made. Exciting stuff! We start with a cantilever and then build to a full structural span. I show you some bridge examples and also how to optimize a truss for material efficiency. Enjoy!
I'm Paul Kassabian. I'm a structural engineer and a Principal at SGH in Boston, MA. I taught graduate students at MIT for nine years and currently teach on/off at Harvard's Graduate School of Design (GSD). These are videos based on my years of teaching structures to students.

Опубликовано:

 

13 мар 2021

Поделиться:

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист
Посмотреть позже
Комментарии : 314   
@timclark7478
@timclark7478 2 года назад
this is what's great about RU-vid, by accident you learn about something you've been observing but not really understand for years 👍
@joeb4142
@joeb4142 2 года назад
The RU-vid algorithm giveth and it taketh away.
@glichasasha750
@glichasasha750 6 месяцев назад
If you think you can learn about trusses in 11 minutes you are delusional.
@user-ek1eb7cy7y
@user-ek1eb7cy7y 11 месяцев назад
Me watching these videos so I can built better bridges in Poly Bridge 3.
@howitstartsmm
@howitstartsmm 6 месяцев назад
First time viewer. Genius is the ability to teach a complicated subject clearly, simply and comprehend able to an average person. Thank you for your time and knowledge.
@PaulKassabian
@PaulKassabian 6 месяцев назад
Thanks!
@daved3494
@daved3494 2 года назад
That was brilliant. I really liked how you developed this, logically, from a single tension and a single compression structure to a structure with multiple members. Thank you.
@elektrolyte
@elektrolyte 2 года назад
Structural Engineer: uses hi NOSE to point out something Me: EVEN MORE respect
@TRON0314
@TRON0314 2 года назад
Vid came up with the algorithm while I've been studying for my Architect exams and brushing up on my structures. Just excellent explanations! VERY helpful.
@robtristram8395
@robtristram8395 2 года назад
What I learnt after a whole career in structural engineering is that most of the time no one really cares about getting even an efficient structure (unless it is the primary structure of something huge), let alone a theoretical optimum. The exception is design-and-build contractors where their profit margin depends on minimising materials, but of course they won't do that at the expense of complication, which costs "more than materials".
@luiscobos123
@luiscobos123 2 года назад
Is that in which country?
@cameronlapp9306
@cameronlapp9306 Год назад
Also dependent on consistency of loading - no good to have an efficient design for only one use case. Efficiency of design presumes at some level a predictability of loading.
@jeremiahbarlow1924
@jeremiahbarlow1924 2 года назад
I have designed trusses at a wood truss manufacturing plant, but never understood this. The software just did if for me. Thank You for sharing.
@dalegray934
@dalegray934 2 года назад
As part of my job, I have to record historic bridges, both automotive and railroad. I love watching your video showing how variations on the Warren and Pratt truss bridges work.
@PaulKassabian
@PaulKassabian 2 года назад
Thank you very much!
@burklander3338
@burklander3338 2 года назад
You explain in such a way that it is easy to understand, bravo!
@Flurib690
@Flurib690 Год назад
Thank you so much for taking the time to make this video. I had a basic understanding of the loads involved in a truss, but some times had a hard time determining how the load was transferred through the structure. And it turns out because I was looking at it backwards. I would look at a bridge and try to figure out the load distribution by the weight of a truck sitting on it, not as the support structure resisting that load. I’m not sure if I explained that well, but your explanations helped a lot. What finally made it click, where I had that lightbulb eureka moment, was your graphics of the hands supporting the structure. I am very grateful for that, and again I appreciate you making these videos for everybody
@PaulKassabian
@PaulKassabian Год назад
You're welcome!
@nicolasramirez3944
@nicolasramirez3944 2 года назад
Paul this is such a concise and beautiful presentation! Your style works so well, like a great piece of music. Well done!
@PaulKassabian
@PaulKassabian 2 года назад
Thanks!
@dopenaidoo1359
@dopenaidoo1359 Год назад
​@@PaulKassabian 0:50 0:59 0:59 0:59 0:59 1:00 1:00 1:00 1:00 1:01 confused right abt here, sir pls help
@goldonon
@goldonon 2 года назад
Thank you sir Very interesting especially the arches and cables you find in the efficient truss
@stevenkamp8001
@stevenkamp8001 2 года назад
well explained, I think the magic in understanding it all ,is breaking it down into small thinking process blocks
@martingagnon4547
@martingagnon4547 2 года назад
One thing that pop in my head is when you build a truss on the ground and you use a crane to put it in place you have to consider that forces (tension and compression) will be the opposite way temporarily while moving it! Good video sir!
@PaulKassabian
@PaulKassabian 2 года назад
Very good point!
@csidun9087
@csidun9087 2 месяца назад
Excellent presentation. As a teacher I compliment you on your presentation. A good teacher takes a complicated subject and explains it in an clear and easy manner that could be understood! Kudos!
@jimmimak
@jimmimak 2 года назад
I like how you teach visually, as it can be difficult going straight to maths without an intuitive understanding.
@kasirk7945
@kasirk7945 Год назад
The tutorial showed up when I needed it the most. God Bless you Sir.
@nikeshrathod7698
@nikeshrathod7698 2 года назад
Amazing explanation of TENSION & COMPRESSION using a PAPER!!!
@michaelyano6094
@michaelyano6094 Год назад
Fantastic work! Thanks Paul!
@CMRHM
@CMRHM 2 года назад
wow, you demonstrate the truss concept in step by step, this is very easy to understand and truly a clever method. Thanks!
@PaulKassabian
@PaulKassabian 2 года назад
You're very welcome!
@gaetanomontante5161
@gaetanomontante5161 8 месяцев назад
Liked and subscribed. I am an engineer and having come across your channel by chance I found it to be be beautiful in the simplicity with which you explain things that in our days professors bored us to death with explanations of vectors and forces that in the end left us as ignorant as we were before. Thank you Paul and please continue the illuminating work. Hopefully some young blood will stick with your presentations and learn much from them, especially in the area of being opened to the enthusiasm of learning beautiful concepts.
@PaulKassabian
@PaulKassabian 8 месяцев назад
Thanks!
@ArtworkAnon
@ArtworkAnon 9 месяцев назад
I’m so friggin pumped on this channel!!!❤❤❤
@dulcedelgado8594
@dulcedelgado8594 2 года назад
Great video with clear explanations!
@kushanimehta9325
@kushanimehta9325 3 года назад
Just discovered this while taking a structures class, this is very helpful and easy to understand. Thankyou!
@PaulKassabian
@PaulKassabian 3 года назад
You're welcome!
@lucianolizana446
@lucianolizana446 2 года назад
It's so intuitive and fun when explained like this !
@PaulKassabian
@PaulKassabian 2 года назад
You're welcome!
@bullfrogpondshop3179
@bullfrogpondshop3179 2 года назад
Nice use of West Point Bridge Designer! I used that with my middle school Technology Education students for many years.
@michaelmacdonald2907
@michaelmacdonald2907 2 года назад
Thank you for that. You bridged my understanding
@cojoe4896
@cojoe4896 10 месяцев назад
I love just going out in the world and trying to understand things work and being able to just ask that question and get a video on it.
@adventure-cowboy
@adventure-cowboy 7 месяцев назад
Fantastic video thank you for explaining all the physics behind each of the different kinds of geometry that was very helpful. I’m trying to learn how to build trusses in the house and this definitely answered my questions.
@user-kk2nl2os5h
@user-kk2nl2os5h Год назад
So simple? No, it is made simple. A simple start, add elements one by one, understand each's role, comprehend the larger complecated picture. Very fine tutorial, that neither goes above head, nor allows to forget easily! Kudos.
@Ennar
@Ennar 11 месяцев назад
Poly Bridge leaderboards, here I come!
@hugodesrosiers-plaisance3156
I am a land surveyor currently doing my stage. I very much hope to work on a large world-class bridge at some point in my career. I have long loved bridges and considered them the greatest expression of Human engineering - because they link People together, they span gaps, they encourage exchange and cultural fluidity. The Ancient Roman Princeps was also the "Pontifex Maximus", the "Great Bridge-Builder". Spanning gaps is a Human fixation, it seems. There's so much glory in a great elegant bridge.
@ssmith2019
@ssmith2019 2 года назад
Nicely done ! Cheers !
@janninoenecio78
@janninoenecio78 2 года назад
best video so far for me, this is perfect for civil engineering students. more power to you sir thank you
@PaulKassabian
@PaulKassabian 2 года назад
You are most welcome
@yemanemelkamu5682
@yemanemelkamu5682 Год назад
That is brilliant ,it instigates useful ideas that can be used in truss and tie model in the design of deep beams of reinforced concrete designs
@PaulKassabian
@PaulKassabian Год назад
Glad it was helpful!
@503dude8
@503dude8 2 года назад
Wow! The way I look at bridges is changed forever. I had to subscribe after watching this video. Thank you 👍
@PaulKassabian
@PaulKassabian 2 года назад
Great to hear!
@mujtabaahmadi7960
@mujtabaahmadi7960 2 года назад
I like the way you explain. I found your approach very logical and easy to follow.
@PaulKassabian
@PaulKassabian 2 года назад
Thanks!
@TheMDJ2000
@TheMDJ2000 2 года назад
Nicely explained! Brings back my Statics lectures from a few decades ago. I might have to dig my textbook...
@PaulKassabian
@PaulKassabian 2 года назад
Good idea, I'll wait...
@user-di4bt7qu2i
@user-di4bt7qu2i 2 года назад
This was a great explanation. Thanks!
@dreamdream8942
@dreamdream8942 3 месяца назад
Genius teaching style. Take love from Bangladesh ❤️❤️
@iliyakhramov4381
@iliyakhramov4381 2 года назад
Sophisticated and simple. That's brillian.
@PaulKassabian
@PaulKassabian 2 года назад
Thanks!
@SheeneP
@SheeneP 11 месяцев назад
좋은 영상 감사합니다 탁월한 전달력 최고네요
@jamieholtsclaw2305
@jamieholtsclaw2305 Год назад
I liked his diagrams. They showed the magnitude and direction of forces in a way I could understand.
@PaulKassabian
@PaulKassabian Год назад
Great!
@ffstructures
@ffstructures 2 года назад
Brilliant .. God bless You !
@flourishomotola5306
@flourishomotola5306 2 года назад
This is the most brilliant explanation of trusses I have ever seen.
@PaulKassabian
@PaulKassabian 2 года назад
Thanks!
@jiojetigarea7176
@jiojetigarea7176 2 года назад
Love this video.... Well illustrated for the beginner...
@PaulKassabian
@PaulKassabian 2 года назад
Glad to hear it!
@bartvrhijn
@bartvrhijn 3 года назад
That part about the optimization of trusses spot on
@PaulKassabian
@PaulKassabian 2 года назад
thanks - much appreciated!
@mmawad100
@mmawad100 9 месяцев назад
excellent thanks for your work
@daviddavid-ow2ys
@daviddavid-ow2ys 10 месяцев назад
Great video, thank you!
@faisalrasheed3616
@faisalrasheed3616 2 года назад
Brilliant way to explain the truss geometry... Thanks
@PaulKassabian
@PaulKassabian 2 года назад
You are welcome!
@starskeymaid
@starskeymaid 2 года назад
God bless a true educator! Paul just found your lessons when you trusses lesson came along my feed. I'm 47 big old goof who only took physics for dummies in college and nothing ever in high school. This is so very interesting and well presented. So very well done Paul, thank you. I can't wait to get to your other content. And watch this one on trusses again.
@PaulKassabian
@PaulKassabian 2 года назад
Thanks and more to come!
@Uswesi1527
@Uswesi1527 Год назад
Very basic knowledge that many people don’t know. Thanks
@kishfoo
@kishfoo 2 года назад
Thank you sir. Anyone with a PHD can explain physics to other well educated people. It takes a master to explain it well to us simpletons.
@PaulKassabian
@PaulKassabian 2 года назад
Thanks!
@mohammedjassim1360
@mohammedjassim1360 Год назад
Great lesson thanks for this lecture
@HarshRajAlwaysfree
@HarshRajAlwaysfree 2 года назад
this is actually pretty nice
@ShahroozAryan-ez7cc
@ShahroozAryan-ez7cc 6 месяцев назад
As a structural bridge engineer, I often watch your clips and thoroughly enjoy them. You demonstrate great creativity and innovation in your work. Particularly impressive was the clip featuring an arch structure built on a small scale model, where you deformed its shape by applying load with your finger. Additionally, the clip discussing trusses was captivating, especially when you introduced the optimized truss, with one part functioning as an arch and carrying compression loads, while the other part acted as a cable and carried tension loads. Overall, your work is truly amazing. Thank you for creating such incredibly beautiful clips.
@PaulKassabian
@PaulKassabian 6 месяцев назад
Thanks!
@milkrecu
@milkrecu 14 дней назад
Beautifully explained and great outro music.
@PaulKassabian
@PaulKassabian 12 дней назад
Glad you liked it!
@mitchdevarennes1337
@mitchdevarennes1337 7 месяцев назад
Great informative video.
@rodneytrotter1427
@rodneytrotter1427 Год назад
These videos are great for helping me throughout my apprenticeship!
@PaulKassabian
@PaulKassabian Год назад
Glad you like them!
@sanjayyadav-hj7dd
@sanjayyadav-hj7dd 2 года назад
fantastic video with concept, very easily explained
@PaulKassabian
@PaulKassabian 2 года назад
Many thanks!
@charlesbromberick4247
@charlesbromberick4247 2 года назад
Thanks for a truly excellent presenttion of the concept of tension/compression in trusses. If only the rest of the world could employ logic as well as you engineers....
@PaulKassabian
@PaulKassabian 2 года назад
Thanks...and in this video I explain why all cafe tables, if designed by engineers, would have 3 legs not 4 and therefore not wobble! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-LYVn4js2izM.html
@planetaryutilities
@planetaryutilities Год назад
Thank you, simple and concise!
@PaulKassabian
@PaulKassabian Год назад
You're welcome!
@KF1
@KF1 2 года назад
you had me at "I'm a structural engineer"
@bobvar72
@bobvar72 2 года назад
You are a great teacher! Nice job with this.
@PaulKassabian
@PaulKassabian 2 года назад
Thanks!
@RG-ru3ux
@RG-ru3ux 2 месяца назад
Hey: I have been watching your video series on structures, and I would like to commend you on both the quality and content of these videos...really well done. In terms of trusses, which truss design do you favor for over all strength for uniform compression loads? Again, thank you for taking the time and effort to make the structure videos.
@vsergeiev
@vsergeiev 2 года назад
Thanks a lot for your awesome videos. Your style and the hints highlighted are truly enjoyable and fun to watch and learn :-) Sincerely wishing you and your RU-vid channel a rapid steady growth and popularity. Kind regards :-)
@Borishal
@Borishal Год назад
Wow. Thank you so much. Inspiring.
@PaulKassabian
@PaulKassabian Год назад
Glad you enjoyed it!
@shahaaa
@shahaaa Год назад
Great explanation! Thank you!!!
@PaulKassabian
@PaulKassabian Год назад
You're very welcome!
@tdz
@tdz 3 года назад
Fantastic!
@PaulKassabian
@PaulKassabian 3 года назад
Thanks Tim!
@JonathanJournal
@JonathanJournal Год назад
love it!!! may i ask how do you simulate bridge tension and compression?
@albertopilaalonso6291
@albertopilaalonso6291 10 месяцев назад
Thanks from Spain
@jimhagler3716
@jimhagler3716 2 года назад
A wonderful video, a beautiful explanation. thank you very, very much. I am not an engineer but I enjoyed this very much. I always wondered.
@PaulKassabian
@PaulKassabian 2 года назад
Glad it was helpful!
@ragas2845
@ragas2845 2 года назад
You ar an amazing teacher! Thanks for sharing your knowledge. I subscribed.
@PaulKassabian
@PaulKassabian 2 года назад
Awesome, great to hear!
@beduino19502010
@beduino19502010 2 года назад
UÁU !. Inglish Is not my original idiom, but, any way, I can say your class was realy wonderfool!!! ( from Argentina).
@BackToReality
@BackToReality 9 месяцев назад
I'm less than two minutes in, but can already tell that I've just struck RU-vid gold! New sub!
@PaulKassabian
@PaulKassabian 8 месяцев назад
Thanks!
@ammarabid2077
@ammarabid2077 2 года назад
3:35 “you have to truss me on this”, well played
@AlxGontijo
@AlxGontijo 11 месяцев назад
Awesome explanation !!!
@PaulKassabian
@PaulKassabian 11 месяцев назад
Glad you liked it!
@bftfcfua2946
@bftfcfua2946 2 года назад
Good illistration technique
@simplesapiens9858
@simplesapiens9858 Год назад
this is great.
@nimnogaparus
@nimnogaparus 8 месяцев назад
Amazing teacher!
@PaulKassabian
@PaulKassabian 8 месяцев назад
Thank you! 😃
@gaveintothedarkness
@gaveintothedarkness 2 года назад
This is a great video, do you think you could do a video on construction cranes and all the tension and compression they face? Im sure there is such a fine balance of all the techniques you have shown us thus far. I've look for years for someone to give a good explanation on the engineering behind cranes and no one has been able to do a good job. Maybe you can be the first :)
@fern8580
@fern8580 9 месяцев назад
3:12 the best explanation , ever, on youtube !
@pabloetchepare7160
@pabloetchepare7160 8 месяцев назад
you have a new subscriber !!!! great video !!!!
@llucruizesteve5949
@llucruizesteve5949 3 года назад
Soo good!!!!
@PaulKassabian
@PaulKassabian 3 года назад
thanks! Do keep watching!
@Micropterus06
@Micropterus06 2 года назад
շնորհակալություն Paul!
@PaulKassabian
@PaulKassabian 2 года назад
You're welcome!
@PratyushTewari
@PratyushTewari Год назад
10:40 ❤ “when you have a limited situation or something you can control, you are able to optimize more”
@AbdulHafeez-cq6oo
@AbdulHafeez-cq6oo 2 года назад
Great description
@PaulKassabian
@PaulKassabian 2 года назад
Thanks!
@HarshRajAlwaysfree
@HarshRajAlwaysfree 2 года назад
you are awesome i hope i learn more from you thanks a lot
@PaulKassabian
@PaulKassabian 2 года назад
You're welcome! More to come...
@muwanguzidawudi8328
@muwanguzidawudi8328 Год назад
Thank you
@nateb1645
@nateb1645 2 года назад
Thank for the help :)
@PaulKassabian
@PaulKassabian 2 года назад
No problem!
@BostonMark
@BostonMark 2 года назад
Beautiful
@etno2010
@etno2010 2 года назад
thanks... ...bridge builder game...very good for that...
@modapk5032
@modapk5032 2 года назад
Very good 👍
@HorzaPanda
@HorzaPanda 9 месяцев назад
This might actually help me finish all those bridge building games I own ^^"
@weavercattlecompany
@weavercattlecompany 11 месяцев назад
That last structure looked like a spider's web 😊
@kreigernella4195
@kreigernella4195 2 года назад
Very goood. i like it
@ColdWarVet607
@ColdWarVet607 2 года назад
Making only one set of lines bend on the paper was the best magic trick I've ever seen, you should headline at Vegas! Just kidding, but it wasfantastic in its simplicity to show a complex idea as was the rest!!! Well done my firend.
@PaulKassabian
@PaulKassabian 2 года назад
Vegas is the goal...
@thecasualengineer99
@thecasualengineer99 Год назад
I know this is a late comment, but this explained it well, thanks Paul.
@narekantonyan2264
@narekantonyan2264 6 месяцев назад
հրաշալի աշխատանք
Далее
How Beams Work! (Part 1): Structures 6-1
3:36
Просмотров 49 тыс.
Whyyy? 😭 #shorts by Leisi_family
00:15
Просмотров 9 млн
Tug’riq avval va hozir 2😂😂
00:44
Просмотров 2,2 млн
Why Rivers Move
17:48
Просмотров 2,6 млн
Harvard Model Bridge Testing! Trusses and Beams
13:16
Understanding and Analysing Trusses
17:41
Просмотров 2,9 млн
The Beautiful Engineering behind the Arch Bridges!
9:59
The Incredible Strength of Bolted Joints
17:58
Просмотров 2,8 млн
10 Trusses You Need To Know! (and 1 Bonus!)
8:30
Просмотров 28 тыс.
The Secret to the Truss Strength!
9:40
Просмотров 335 тыс.
Why Buildings Need Foundations
14:51
Просмотров 3,4 млн
Physics Students' Bridge Designs Get Tested
3:32
Просмотров 114 тыс.
Whyyy? 😭 #shorts by Leisi_family
00:15
Просмотров 9 млн