Unbraced Length Ratio (Major and Minor)
Unbraced Length Ratio (Major and Minor)
(OP)
Dear colleagues,
Let's imagine that we're working on a metallic beam with 10 meters length and it was devided in 6 frames for a better analysis.
The working code is the Euro Code.
After running the Design/Check of structure, I verified that SAP2000 assume values, which I think they are for the worst case for each single frame element.
What is the correct length ratios for this case?
I´ve a note from college saying "the major length bending stands for the number of times the beam was divided".
Is this true? And what is the "minor length bending"?
I'll appreciate any answer explainning how to do it or WHERE in the SAP2000 manuals I can find this?
Thank you
agps
Let's imagine that we're working on a metallic beam with 10 meters length and it was devided in 6 frames for a better analysis.
The working code is the Euro Code.
After running the Design/Check of structure, I verified that SAP2000 assume values, which I think they are for the worst case for each single frame element.
What is the correct length ratios for this case?
I´ve a note from college saying "the major length bending stands for the number of times the beam was divided".
Is this true? And what is the "minor length bending"?
I'll appreciate any answer explainning how to do it or WHERE in the SAP2000 manuals I can find this?
Thank you
agps





RE: Unbraced Length Ratio (Major and Minor)
In your example, you wouldn't have to deal with 6 moment diagrams for one 10 meter frame if you instead Assign intermediate frame automesh joints. I'm pretty sure that SAP2000 V14, and maybe V12 too, have Eurocode design manuals in the 'Manuals' subdirectory which installs with SAP