PinchingLimitStateMaterial Example: Difference between revisions
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uniaxialMaterial PinchingLimitStateMaterial 9 6 2 1 3057.9 2 1 0.3 0.2 0.0 0.3 0.2 0.0 0.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 | uniaxialMaterial PinchingLimitStateMaterial 9 6 2 1 3057.9 2 1 0.3 0.2 0.0 0.3 0.2 0.0 0.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 | ||
[[Image:Pinchingmaterial_fitted_sp1.png]] | [[Image:Pinchingmaterial_fitted_sp1.png|400px]] | ||
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[[Image:PinchingLimitState Sp1-c.png]] | [[Image:PinchingLimitState Sp1-c.png|400px]] | ||
Revision as of 20:33, 11 April 2014
- Command_Manual
- Tcl Commands
- Modeling_Commands
- model
- uniaxialMaterial
- ndMaterial
- frictionModel
- section
- geometricTransf
- element
- node
- sp commands
- mp commands
- timeSeries
- pattern
- mass
- block commands
- region
- rayleigh
- Analysis Commands
- Output Commands
- Misc Commands
- DataBase Commands
The following are sample scripts for using the Pinching Limit State Material and associated limit surface (RotationLimitCurve) to simulate the behavior of a shear-critical reinforced concrete column tested by Sezen and Moehle (2006) (Specimen 1).
The scripts below are for a material model and limit surface that are applied to zero-length shear springs in series with fiber-section column elements (see references below fro more detail).
Mode 1: Direct Parameter Input
limitCurve RotationShearCurve 1 3 1 3 3 -1 -1 -10.0 0.0175
uniaxialMaterial PinchingLimitStateMaterial 9 6 2 1 3057.9 2 1 0.3 0.2 0.0 0.3 0.2 0.0 0.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3
Mode 2: Calibrated Model Input
limitCurve RotationShearCurve 1 3 1 3 3 -1 -1 0 1 16.0 13.625 16.0 115.75 6.0 6.28 169.0 43.0 1.0 0.00393 -3.177 65.5 66.6 0.0
uniaxialMaterial PinchingLimitStateMaterial 9 6 2 1 -3 2 2 1 16.0 13.625 16.0 57.88 6.0 6.28 169.0 43.0 1.0 0.00393 -3.177 65.5 66.6
REFERENCES:
1. LeBorgne M. R., 2012, "Modeling the Post Shear Failure Behavior of Reinforced Concrete Columns." Austin, Texas: University of Texas at Austin, PhD, 301.
2. LeBorgne M. R. , Ghannoum W. M., 2013, "Analytical Element for Simulating Lateral-Strength Degradation in Reinforced Concrete Columns and Other Frame Members," Journal of Structural Engineering, doi: 10.1061/(ASCE)ST.1943-541X.0000925
3. Ghannoum W. M., Moehle J. P., 2012, "Rotation-Based Shear Failure Model for Lightly Confined Reinforced Concrete Columns," Journal of Structural Engineering, V. 138, No. 10, 1267-78
4. Sezen Halil, Moehle Jack P., 2006, "Seismic Tests of Concrete Columns with Light Transverse Reinforcement," ACI Structural Journal, V. 103, No. 6, 842-9.