View source for OpenSees.exe User Requirements

__NOTOC__
<h2>Implemented Requirements</h2>

<h3>Element</h3>
{{:Element Command}}

<h3>Section</h3>
{{:Section Command}}

<h3>uniaxialMaterial</h3>
{{:UniaxialMaterial Command}}

<h3>nDMaterial</h3>
{{:NDMaterial Command}}


<h3>Output</h3>
<h5>Recorder</h5>
{{:Recorder Command}}
<h5>Real-Time Output </h5>
{{:RealTime Output Commands}}
<h5>Basic Visualization</h5>
*Display Recorder
*Plot Recorder
*playback Command
<h5>Domain Data</h5>
*[[Print Command]]
**print element data
**print node data
**print all domain-object data

<h3>Other</h3>
*Input Motion
**Input displacement history in UniformExcitation [[Pattern Command]]
**Input acceleration history in MultipleSupport [[Pattern Command]]

<h2>Under-Development Requirements</h2>

<h3>Element</h3>
*2D/3D Wall Elements
*3d nonlinear frame element with full interaction 
**axial
**flexure
**torsion
**shear
<h3>Section</h3>

<h3>Material</h3>
*Improved concrete materials
*Improved reinforcing-steel materials
<h3>Output</h3>
<h3>Other</h3>

<h2>To-Be-Developed Requirements</h2>

<h3>Element</h3>
*Buckling-Brace Elements
*Flexible Diaphragm
*2D & 3D Isolators
*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

<h3>Section</h3>
*2d normal and shear stress interaction

<h3>Material</h3>
*3d J2 plasticity with kinematic and isotropic hardening
*3d plastic-damage concrete constitutive model Lee-Fenves

<h3>Output</h3>
*Specify recorder to save only every Nth timestep (specifying dT only works for time-history analyses)
* EnvelopeDrift Node recorder

<h3>Other</h3>
*improved domain-data output

<h2>Continual-Development Requirements</h2>

<h3>Documentation</h3>
*[[Main Page | OpenSeesWiki]]
*Validation with experimental data
* Materials
**Graphical demonstration of input-arguments
*Examples manual
**Practical Examples
*Theoretical Background


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