Q:
How to output compressive strain or to provide limiting values in input file with certain criteria?
For the walk through purpose, lets consider the the following requirements.
- Compressive strains: 5% provided D/T ratio is smaller than 25. And 4% for D/t smaller than 30 and 3.1% for D/t smaller than 40.
- Tensile strain criteria which are 15% for s355 steel. (tensile rupture)
- How to implement this criterion in collapse input file?
R:
- Compressive strains: 5% provided D/T ratio is smaller than 25. And 4% for D/t smaller than 30 and 3.1% for D/t smaller than 40.
Collapse programs check the limit of the compressive strains in the context of the local buckling and support various methods. The program basically checks the compression stress resulted from the compressive strain. Please check the local buckling option on the CLPOPT line or see section 3.1.1.1 in the Collapse Advanced user manual. Standard Collapse also has similar options.
If you want to use different criteria for compression strains, you can always create strain reports in Collapse Advanced and checks values manually.
- Tensile strain criteria which are 15% for s355 steel. (tensile rupture)
The strain ductility limit (tensile rupture) can be entered on the CLPOP2 line for Standard Collapse and Collapse Advanced. Please check the collapse user manuals for details.
How to implement this criterion in collapse input file?
As mentioned above, Collapse programs can check the ductility limit and local buckling, but we don't currently support user-defined custom criteria for checking compression strains. Users can print strain reports in the Collapse Advanced listing file for members and plates if they want to apply different criteria. Then, they can manually check values. Please see the details on CLPRPT line in Collapse Advanced input file - or screenshot below: