I’m 19 years old and have realized how little I know about things that are around me and play a crucial role in my life. I’ve decided to learn so much about the structures around me and try to understand them a little better
I absolutely love this video series on structures. I think you do an amazing job explaining the topics and wish all professors had your skill and passion for teaching
This was a wonderful video. I have pondered the 'thrust line' in an arch and have even tried to calculate it''s position from first principles. I soon realised I do not know enough on the subject to be certain of the placement of the thrust line. I was aware of this inverted chain method and its use by Gaudi and also it use in the checking of St Peter Dome but for some reason I never quite put the two together. Thank you for such a wonderful explanation. I hope that you continue your series of videos.
I'm a farmer living in New Hampshire USA. I'm fascinated by arches. I love to design small buildings, like chicken coops. I'm doing one now, with a roof that is a half arch, and having trouble finding a rigid structural material that will give the desired curve and strength, while being lightweight, streamlined and capable of receiving fasteners like nails and screws. I'm covering the roof with corrugated polycarbonate roofing panels... but I'd really like to know if one can get small arches commercially... or do I have to build my own? I'll probably have to make my own. Anyway, this was a great video, and it taught me a lot about designing with arches and partial arches. Thank you! 🎉 Edit: forgot to say, I'm a new subscriber!! 😊
Good question! Remember this plot doesn't have the self-weight of the masonry itself, so that helps. Other options for masonry arches is to add more distributed weight above so the effect of the point load is reduced, or reduce the point load itself somehow. Lastly, make the arch in a material that can take tension.
Smashing video series! You certainly have a gift of explaining structural engineering to those without training! During the segment about the bridge that you worked on in England, "this is a steel arch so this can carry tension and compression" In Video 2.1, "arch carries compression only." Assume there is something here above my RUclips structural engineering certification. Can you explain "carry tension and compression?" Many thanks!
What if the arch was the exterior of a building, and you attached a second story floor to the interior edges half way up the arch. How would that affect the forces on the arch?
If arch(catenary) bridges requires forces acting on them to be balanced in order not to fall down, how does it deal with varying loads like moving vehicles on the deck of the bridge.
I know very little so this is a very open question, but in the case of the single load off to the side, would you find the weakest point on the arch by using a differential equation to figure out at what point the area between the thrust line and the upper arch is the greatest?
Teacher you said that the arc gets destroyed if the weight gets changed. Now imagine a live load in the form a truck moving on that compression arch. How does it deal with that continuously moving load?
As an avid researcher into architectural advancement I hope that you will do a series of if it is possible to make a 100 km spherical dreamcatcher The reason a dreamcatcher can be made any size is because it only relies on two rings and wire to hold it together, same as a geodesic dome except it uses wire I've done some research into this topic and from my understanding each ring can be made from scaffolding for 700,000 each so approximately 2.5 million dollars for the three rings and the wire would cost 25 million I haven't reviewed the manual labor or the beam support If there is any way to convince a company to do such a thing we can add an elevator on the side and ship things 100 km off of the ground and launch things in outer space using gunpowder I hope there's some way I can interest you in this
I'm a bricklayer and I'm wondering what the strongest arch is. I've heard segmental, catenary or triangular? What is the answer? And does a triangular arch still count as a true arch?
Look up a derivation for the shape of a cable under uniform loading. The curve turns out to be parabolic. In an arch under uniform loading, the thrust line will be parabolic (anti-funicular form based on the cable). A semi circular arch is different than a parabolic curve, and that deviation will introduce bending moments!
Interesting, superb videos. Where could I build my own mini bridge, maybe in small scale first. Would I be able to calculate the max weight and size of things? Food for thoughts, if I had the time...but I find this subject refreshing among all these Ukraine this and that news (I wish Putin would give up).
Hi Paul, I have the original master betacam footage of the millennium bridge being installed. It’s been sat in my loft for maybe the last 20 years. Perhaps it would be a nice keepsake for you? I would be delighted to send it your way as a gift. Let me know if you would like it, if so you can find my email on my channel ‘about’ page. Thanks for making the series, it’s a great watch 👍
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I’m 19 years old and have realized how little I know about things that are around me and play a crucial role in my life. I’ve decided to learn so much about the structures around me and try to understand them a little better
We are seeing the power of someone who can explain a topic so well
Thanks!
I absolutely love this video series on structures. I think you do an amazing job explaining the topics and wish all professors had your skill and passion for teaching
Beautifully explained and demonstrated - thank you!
This was a wonderful video. I have pondered the 'thrust line' in an arch and have even tried to calculate it''s position from first principles. I soon realised I do not know enough on the subject to be certain of the placement of the thrust line. I was aware of this inverted chain method and its use by Gaudi and also it use in the checking of St Peter Dome but for some reason I never quite put the two together. Thank you for such a wonderful explanation. I hope that you continue your series of videos.
Amazing explanation Paul. This video needs more publicity.
Hey thanks! Doing my part to get structural engineering thinking out there...
The diagrammatic representation work is very good and easy to understand. Thanks!
Thanks so much for your videos Paul! They are so simple and vastly helpful!
Glad you like them!
Great video. You explain very well. I can tell that you love and know your subject.
Wow! Super nice explanation , this is so helpful to me. Looking forward to more videos like this. Thankyou so much.
You're welcome and glad to hear it!
SO SO GOOD! Keep making videos to help us architecture students....
That's the aim!
I'm a farmer living in New Hampshire USA. I'm fascinated by arches. I love to design small buildings, like chicken coops. I'm doing one now, with a roof that is a half arch, and having trouble finding a rigid structural material that will give the desired curve and strength, while being lightweight, streamlined and capable of receiving fasteners like nails and screws. I'm covering the roof with corrugated polycarbonate roofing panels... but I'd really like to know if one can get small arches commercially... or do I have to build my own?
I'll probably have to make my own.
Anyway, this was a great video, and it taught me a lot about designing with arches and partial arches. Thank you! 🎉
Edit: forgot to say, I'm a new subscriber!! 😊
Great video, really enjoying the series. Also thank you for the millennium bridge, beautiful bridge. I have an apartment that looks right onto it.
You're welcome! Video on Gateshead coming soon!
Love your wonderful and easy to understand video tutorials! Would have loved to be a student under your tutelage
I have a question. At 4:31 say you wanted to improve the strength of the arch in the scenario, what would you have to do to prevent it from failing?
Good question! Remember this plot doesn't have the self-weight of the masonry itself, so that helps. Other options for masonry arches is to add more distributed weight above so the effect of the point load is reduced, or reduce the point load itself somehow. Lastly, make the arch in a material that can take tension.
thank you for this video! i wish i found this sooner when i was still in engineering school
You're very welcome!
thanks for this video, i really love the explanation
Smashing video series! You certainly have a gift of explaining structural engineering to those without training!
During the segment about the bridge that you worked on in England, "this is a steel arch so this can carry tension and compression" In Video 2.1, "arch carries compression only." Assume there is something here above my RUclips structural engineering certification. Can you explain "carry tension and compression?"
Many thanks!
Ur explanation is very clear
thanks!
This is interesting! And powerful knowledge! Thank you so much!
You're welcome!
I’m 12 and I’m here because I was confused how bridges work and it is satisfying to finally get the answer
Such an amazing explanation. I wish they taught students about arches in school.
Thanks for saying that!
Is there some sort of program for punching in start points, end points, and loads? That would be great!
What if the arch was the exterior of a building, and you attached a second story floor to the interior edges half way up the arch. How would that affect the forces on the arch?
Hi sir, I want to know about how braced barrel vaults works?
can you design a 3 centered arch drawn with a square, that can use a built up wooden arch truss? span say 60 feet? maybe out of 2x6's ?
Wonderful explanation, really it is very helpful.
Glad it was helpful!
If arch(catenary) bridges requires forces acting on them to be balanced in order not to fall down, how does it deal with varying loads like moving vehicles on the deck of the bridge.
I loved the explanation
Thanks for saying that - much appreciated!
I know very little so this is a very open question, but in the case of the single load off to the side, would you find the weakest point on the arch by using a differential equation to figure out at what point the area between the thrust line and the upper arch is the greatest?
Teacher you said that the arc gets destroyed if the weight gets changed. Now imagine a live load in the form a truck moving on that compression arch. How does it deal with that continuously moving load?
Love this!!!
Hi plz make more such videos.these are really helpful for us.thank you very much
Just posted the most recent and more on the way!
@@PaulKassabian thank you very much dear sir , you are doing really great job , for young engineers .
There can be many arches between two points. Am I correct? If yes, how to choose the one for my design?
Wonderful video
Many thanks!
As an avid researcher into architectural advancement I hope that you will do a series of if it is possible to make a 100 km spherical dreamcatcher
The reason a dreamcatcher can be made any size is because it only relies on two rings and wire to hold it together, same as a geodesic dome except it uses wire
I've done some research into this topic and from my understanding each ring can be made from scaffolding for 700,000 each so approximately 2.5 million dollars for the three rings and the wire would cost 25 million I haven't reviewed the manual labor or the beam support
If there is any way to convince a company to do such a thing we can add an elevator on the side and ship things 100 km off of the ground and launch things in outer space using gunpowder I hope there's some way I can interest you in this
ขอบคุณ สำหรับการเรียนรู้วิชา เรขาคณิตที่เรียนในระดับประถม สามารถสร้างสิ่งมหัสจรรย์ โดยอาศัยค่าสมมาตรในวิศกรรมศาสตร์.
I'm a bricklayer and I'm wondering what the strongest arch is. I've heard segmental, catenary or triangular? What is the answer? And does a triangular arch still count as a true arch?
I was taught segmental but have also heard triangular yet Google says catenary?
If the arch is an inverted catenary do you get horizontal shear at the supports?
Break the force vector at the supports into two vectors, one of which is in the shear direction.
Nice.
great videos!!!
can you please explain mathematically, why the parabolic shape are better than semi circular arches ?
Look up a derivation for the shape of a cable under uniform loading. The curve turns out to be parabolic.
In an arch under uniform loading, the thrust line will be parabolic (anti-funicular form based on the cable).
A semi circular arch is different than a parabolic curve, and that deviation will introduce bending moments!
Great response...
Announcer: "Sorry, folks! You must leave. The thrust line has left the building!"
Interesting, superb videos. Where could I build my own mini bridge, maybe in small scale first. Would I be able to calculate the max weight and size of things? Food for thoughts, if I had the time...but I find this subject refreshing among all these Ukraine this and that news (I wish Putin would give up).
I was hoping you would have discussed the buttress and flying buttresses here
Maybe another video??
Hi Paul,
I have the original master betacam footage of the millennium bridge being installed. It’s been sat in my loft for maybe the last 20 years.
Perhaps it would be a nice keepsake for you? I would be delighted to send it your way as a gift.
Let me know if you would like it, if so you can find my email on my channel ‘about’ page.
Thanks for making the series, it’s a great watch 👍
Thanks and glad we connected by email!
Thanks too much
many like
sorry Mr Paul
parabola or hyperbola?
and that is how we build wooden roofs .