I Beam - Lateral Torsional Buckling Test
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- Опубликовано: 4 апр 2019
- Lateral torsional buckling occurs when an applied load results in both lateral displacement and twisting of a member. You can see the first part of the video shows bending of the I beam and then it starts to buckle i.e. lateral displacement and twisting.
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Attribution:
Video - Lateral Torsional Buckling Test by Faculty of Civil Engineering RWTH Aachen University (www.fb3.rwth-aachen.de) is licensed under CC BY 4.0 (creativecommons.org/licenses/.... Original video was edited.
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Thanks. It was very hard to visualise this phenomenon prior to seeing your video. Keep up the good work.
Muthomi Munyua Glad you found it useful.
Thanks for showing it practically.
shivam sharan lall 👍🏻
Can you provide the size and span of the beam as well as the exact location of the load along the length (assuming it's at midspan right now)? I'm curious how this compares to AISC equations.
what value of load have you taken as the critical buckling load?
As an Engineer, i recommend you test beams for bilateral contortional buckling and collateral torsional flexure. These are not very well understood failure modes.
Very good and funny videos bring a great sense of entertainment!
I have a question.
Here, is I-Beam subjected to a positive bending moment?
Thx, the bolts and welds jointing vierendeel floor trusses with the columns of WTC towers didn't fail because of excess loading ,softening from heat or linear expansion resulting from planestrike alone
I hoped to see this test reac catastrophic failure
Thank u so much
Most welcome.
How the graphs are get plotted in real time? Is it done by the apparatus it self?
If you want detailed graphs then you can use a kit with digital force & displacement sensors (simultaneous) connected to a computer. These sensors normally come with software that plots the graphs.
can u tell me the name of apparatus used
This testing rig is comprised of moveable hydraulic jack (allow for the lateral shift) and support units with degrees of freedom to facilitate the lateral torsional buckling test.
Pls tell me the name of the apparatus used
This testing rig is comprised of moveable hydraulic jack (allow for the lateral shift) and support units with degrees of freedom to facilitate the lateral torsional buckling test.
Are u from sl?
Yes, I am.
lol now i know that there's also plastic strain after lateral torsional buckling..
btw may i know:
a. the steel profile size
b. the distance between support
c. the condition of support (confinement)
Support condition seems semi-rigid
Can someone tell me if vertical stiffeners would help in this case at all? Or do they help against local buckling only?
@@19Borneo67 thank you for a very detailed answer. You helped me with my question greatly.
From Brazil. What is the dimensions of this steel beam? W150x13.... W200x...
Hi - This is a 330x160mm steel beam
@@IamDilakshana Thanks very much. Please ...the length...
UZIAHH SOARES You’re welcome. Beam length is 6.2m.
@@IamDilakshana the load was applied on the beam with what distance from the pin? Is that pin holed on supports?
Marcos Ferreira Load is applied approximately 1.86m from the nearest support which is a spring with a spring stiffness of 40430kNm/rad.
I tried to replicate this test in the Software Ansys Mechanical, if someone want to know more about this, reply this coment! =)
Please share more. What are your findings? Can you extract a video from Ansys?
@@IamDilakshana Using the conditions:
- 330x160mm steel beam;
- 6,2m
- Force aplied 1,86m from nearest pin
- Spring stiffness: 40430kNm/rad
I found a Force limit of 160,89kN to buckle! Very close to your test! I'll try to make a video soon
I beam is not good
Box sec and C chanel BTB is good