engcan94
Civil/Environmental
- Dec 1, 2017
- 2
Hi,
I am trying to model a bimodular (MOE tension and compression are different) bar/frame element in SAP2000 and am not getting the results I expect. I have input a user stress-strain curve, under the "nonlinear material data" tab in the "advanced material property data" section in the material property data box to reflect the bimodular properties.
The simple bar element is simply supported (pinned at joint 1 and roller at joint 2). A load of 1kn is applied in the x-direction (longitudinal). Since the material is bimodular, MOE in tension is 12500 MPA and MOE in compression is 8500 MPA, we should expect the u1 displacement to be greater if the lateral load is applied to cause compression rather than tension.
Obviously, the program isn't considering the nonlinear material properties and just using the tensile MOE. I think it may be because of the nonlinear analysis I am using.
Thoughts / suggestions?
Thank you!
I am trying to model a bimodular (MOE tension and compression are different) bar/frame element in SAP2000 and am not getting the results I expect. I have input a user stress-strain curve, under the "nonlinear material data" tab in the "advanced material property data" section in the material property data box to reflect the bimodular properties.
The simple bar element is simply supported (pinned at joint 1 and roller at joint 2). A load of 1kn is applied in the x-direction (longitudinal). Since the material is bimodular, MOE in tension is 12500 MPA and MOE in compression is 8500 MPA, we should expect the u1 displacement to be greater if the lateral load is applied to cause compression rather than tension.
Obviously, the program isn't considering the nonlinear material properties and just using the tensile MOE. I think it may be because of the nonlinear analysis I am using.
Thoughts / suggestions?
Thank you!
