OpenSees.exe User Requirements
Implemented Requirements
Element
- Beam-Column Elements
- Truss Elements
- 2D Wall Elements
Section
- Elastic Section
- Fiber Section
- Section Aggregator
- Elastic Membrane Plate Section
- Plate Fiber Section
- Bidirectional Section
- Isolator2spring Section: Model to include buckling behavior of an elastomeric bearing
uniaxialMaterial
- Steel & Reinforcing-Steel Materials
- Steel01 Material
- Steel02 Material -- Giuffré-Menegotto-Pinto Model with Isotropic Strain Hardening
- Hysteretic Material
- Concrete Materials
- Concrete01 Material -- Zero Tensile Strength
- Concrete02 Material -- Linear Tension Softening
- Concrete03 Material -- Nonlinear Tension Softening
- Multi-Purpose Materials
- Elastic Material
- Elastic-Perfectly Plastic Material
- Elastic-Perfectly Plastic Gap Material
- Elastic-No Tension Material
- Parallel Material
- Series Material
- Hardening Material
- Contributed uniaxialMaterial
- BARSLIP Material
- Bond_SP01 - - Strain Penetration Model for Fully Anchored Steel Reinforcing Bars
- Concrete04 Material -- Popovics Concrete Material
- Concrete07 – Chang & Mander’s 1994 Concrete Model
- Fatigue Material
- Hyperbolic Gap Material
- Limit State Material
- PINCHING4 Material
- PyTzQz uniaxialMaterials
- Reinforcing Steel Material
- SelfCentering Material – Flag-Shaped Hysteresis with Slip Deformation and Bearing
- Elastic Isotropic Material
- J2 Plasticity Material
- Plane Stress Material
- Plate Fiber Material
- UCDavis Soil Models
- Template Elasto-Plastic Material
- UCSanDiego Soil Models
- FluidSolidPorousMaterial
- PressureDependMultiYield Material
- PressureDependMultiYield02 Material
- PressureIndependMultiYield Material
- updateMaterialStage
- updateParameter
Recorder
- Node
- Node
- EnvelopeNode
- Drift
- Element
- Element
- EnvelopeElement
- Section
- Element
- EnvelopeElement
- Fiber
- Element
- EnvelopeElement
- Basic Visualization recorders
- Display
- Plot
- playback Command
Other
Under-Development Requirements
Element
- 2D/3D Wall Elements
- 3d nonlinear frame element with full interaction (axial, flexure, torsion and subsequently shear)
Section
Material
- Improved concrete materials
- Improved reinforcing-steel materials
Recorder
Other
To-Be-Developed Requirements
Element
- Buckling-Brace Elements
- Flexible Diaphragm
- 2d Timoshenko beam element
- 3d frame element with bond-slip of reinforcing steel
- 3d frame element with slip between components, e.g. composite beam, composite column
- 3d concentrated plasticity element with return map algorithm
- 2d SIZE (spreading inelastic zone) beam element
- Nonlinear geometry developments
- Extension of corotational theory to membranes and shells
- Reformulation of 3d frame nonlinear geometry such that any element can take advantage of nonlinear transformation (currently not the case); quaternions vs. rotation nodal variables require either a change in global solution strategy or the mapping back and forth between quaternions and node rotations.
- The following elements include linear or corotational geometry for membranes and shells under large displacements
- 3 to 6 node triangle
- 4 to 9 node quad
- 4 node quad with incompatible modes
- 4 to 9 node RC panel (quad)
- 4 to 9 node Mindlin layer plate/shell
- 4 to 9 node Mindlin RC layer plate/shell
- Discrete Kirchoff triangle plate/shell element
Section
- 2d normal and shear stress interaction
Material
- 3d J2 plasticity with kinematic and isotropic hardening
- 3d plastic-damage concrete constitutive model Lee-Fenves
Recorder
Other
Continual-Development Requirements
Documentation
- Validation with experimental data
- Materials
- Graphical demonstration of input-arguments
- Examples manual
- Theoretical Background
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