Daemon1
Student
- Mar 15, 2022
- 20
Hello everyone, the objective of my work is to perform a stress distribution analysis on a column base plate using a FEA software. Honestly, I don’t have a clear picture of how to accomplish this task, so any advice would be appreciated.
From the little research I did, I decided to perform a FEM analysis of a column-base model in ABAQUS and from there plot the different relevant graphs.
I drew my column-base model, created and assigned the following materials:
-S275 JR for the IPE 300 column
-S235 JR for the stiffeners, the base plate and the strut
(Actually, these materials and dimensions are from a real project I visited)
-I used concrete damage plasticity with compression and tension values as material property for the concrete block
After the assembly, In the step module, I created a loading step (In which I applied a horizontal displacement to the column top there by initiating a bending) while considering non-linear geometry.
In the interaction module
- I created the contact interaction property and used it to define an interaction in the initial step in which I issued a friction coefficient for all elements/parts touching in contact.
- Created tie constraints between stiffeners and baseplate, baseplate and column
- Created the embedded constrain between the part of the anchor rod buried in concrete and the concrete block
- Applied a rigid body constrain at the top of the column before applying the displacement
- Applied a rigid body constrain at the base of the concrete block followed by fixing all the displacements and rotations at the base to 0 (Fixed))
In the Load module
- I applied the horizontal displacement at the top of the column base with a ramp amplitude.
Mesh module:
- I meshed all the elements
Job module
I ran the analysis and I faced some problems:
- No matter the amount of displacement I apply to the column top, it seems like little to no stress is transmitted to the base plate
- I performed an analysis by changing the loading condition to axial compression but only the column was affected again, the baseplate had very little deformation and the concrcete none
I actually wish to see a deformation of the base plate especially at the level of the bolt and also see an effect on the concrete block. Maybe I made some errors and I don’t know them, I wish to get some help guys.
Also, all my analyses are static monotonic analyses
Here are some images of the results I got from the axial load and horizontal displacement loading cases:
I provided a little video for the bending behaviour. I think the displacement is so small because the analysis aborts all the time but I don't know why!. I have enough space.
Video Link:
From the little research I did, I decided to perform a FEM analysis of a column-base model in ABAQUS and from there plot the different relevant graphs.
I drew my column-base model, created and assigned the following materials:
-S275 JR for the IPE 300 column
-S235 JR for the stiffeners, the base plate and the strut
(Actually, these materials and dimensions are from a real project I visited)
-I used concrete damage plasticity with compression and tension values as material property for the concrete block
After the assembly, In the step module, I created a loading step (In which I applied a horizontal displacement to the column top there by initiating a bending) while considering non-linear geometry.
In the interaction module
- I created the contact interaction property and used it to define an interaction in the initial step in which I issued a friction coefficient for all elements/parts touching in contact.
- Created tie constraints between stiffeners and baseplate, baseplate and column
- Created the embedded constrain between the part of the anchor rod buried in concrete and the concrete block
- Applied a rigid body constrain at the top of the column before applying the displacement
- Applied a rigid body constrain at the base of the concrete block followed by fixing all the displacements and rotations at the base to 0 (Fixed))
In the Load module
- I applied the horizontal displacement at the top of the column base with a ramp amplitude.
Mesh module:
- I meshed all the elements
Job module
I ran the analysis and I faced some problems:
- No matter the amount of displacement I apply to the column top, it seems like little to no stress is transmitted to the base plate
- I performed an analysis by changing the loading condition to axial compression but only the column was affected again, the baseplate had very little deformation and the concrcete none
I actually wish to see a deformation of the base plate especially at the level of the bolt and also see an effect on the concrete block. Maybe I made some errors and I don’t know them, I wish to get some help guys.
Also, all my analyses are static monotonic analyses
Here are some images of the results I got from the axial load and horizontal displacement loading cases:
I provided a little video for the bending behaviour. I think the displacement is so small because the analysis aborts all the time but I don't know why!. I have enough space.
Video Link:
