Dear fmk,
I have a few questions about fiber section stress strain recorder.
- Is there any way i can record the stress strain responce of all fibers of my section that have the same y or z coordinate?
- I can ask to record the stress strain of a fiber by providing the coordinates of the fiber or by providing the number of the fiber. How does opensees assign numbers to fibers? How I can find the number of a specific fiber?
- Is there any way i can record to one file the stress strain responce of two or more fibers?
- I'm modelling an RC rectangular column with 4 reinforcing bars at the corners. I want to record the stress strain responce of the steel fiber at the upper left edge of the column. I use the above command:
recorder Element -xml data/stressstrain.out -time -ele 1 section 1 fiber -0.22 0.0925 4 stressStrain
The problem is that the output that is recorded is the stress strain of a fiber with coordinates
<FiberOutput yLoc="-0.220000" zLoc="0.000000" area="0.000254">
yLoc and area of the fiber are correct but zLoc is wrong.
I try also to record the responce of a concrete fiber at another location but always the zLoc of the recorded fiber is zero. I don't understand what I am doing wrong.
Thank you very much for your help in advance...
Fiber stress strain recorder
Moderators: silvia, selimgunay, Moderators
1. no .. put the request in user requirements forum. the problem with the approach however is the amount of output that if misused this would generate.
you can request the section deformations, from these the strain at each fiber location can be determined. a simple script can then be used to get material stresses for each material. this is for example what BuildingTCl does.
2. fibers are added 1 at a time, as each is added it is given a number starting at 0.
3. if they are in the same element then no.
4. if this is a 2d problem you have, to save memory the zLocation was not stored. each fiber in a 2d section only has a yCoord and area associated with it.
you can request the section deformations, from these the strain at each fiber location can be determined. a simple script can then be used to get material stresses for each material. this is for example what BuildingTCl does.
2. fibers are added 1 at a time, as each is added it is given a number starting at 0.
3. if they are in the same element then no.
4. if this is a 2d problem you have, to save memory the zLocation was not stored. each fiber in a 2d section only has a yCoord and area associated with it.