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ZeroLengthSection Class Reference#include <ZeroLengthSection.h>
Inheritance diagram for ZeroLengthSection::
List of all members.
Public Methods |
| | ZeroLengthSection (int tag, int dimension, int Nd1, int Nd2, const Vector &x, const Vector &yprime, SectionForceDeformation &theSection) |
| | ZeroLengthSection () |
| | ~ZeroLengthSection () |
| int | getNumExternalNodes (void) const |
| | public methods to obtain inforrmation about dof & connectivity. More...
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| const ID& | getExternalNodes (void) |
| int | getNumDOF (void) |
| void | setDomain (Domain *theDomain) |
| int | commitState (void) |
| | public methods to set the state of the element. More...
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| int | revertToLastCommit (void) |
| int | revertToStart (void) |
| const Matrix& | getTangentStiff (void) |
| | public methods to obtain stiffness, mass, damping and residual information. More...
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| const Matrix& | getSecantStiff (void) |
| const Matrix& | getDamp (void) |
| const Matrix& | getMass (void) |
| void | zeroLoad (void) |
| int | addLoad (const Vector &addP) |
| int | addInertiaLoadToUnbalance (const Vector &accel) |
| const Vector& | getResistingForce (void) |
| const Vector& | getResistingForceIncInertia (void) |
| int | sendSelf (int commitTag, Channel &theChannel) |
| | public methods for element output. More...
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| int | recvSelf (int commitTag, Channel &theChannel, FEM_ObjectBroker &theBroker) |
| int | displaySelf (Renderer &theViewer, int displayMode, float fact) |
| void | Print (ostream &s, int flag=0) |
| Response* | setResponse (char **argv, int argc, Information &eleInformation) |
| | method for obtaining information specific to an element. More...
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| int | getResponse (int responseID, Information &eleInformation) |
Detailed Description
The ZeroLengthSection class represents an element defined by two nodes at the same geometric location, hence it has zero length. The nodes are connected by a SectionForceDeformation object which represents the force-deformation relationship for the element.
ZeroLengthSection elements are constructed with a {tag} in a domain of {dimension} 2 or 3, connected by nodes {Nd1} and {Nd2}. The vector {x} defines the local x-axis for the element and the vector {yprime} lies in the local x-y plane for the element. The local z-axis is the cross product between {x} and {yprime}, and the local y-axis is the cross product between the local z-axis and {x}. \
Definition at line 65 of file ZeroLengthSection.h.
Constructor & Destructor Documentation
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Construct a ZeroLengthSection element with {tag} . The force-deformation relationship for the element is obtained by invoking {getCopy()} on the {\bf SectionForceDeformation} pointer {theSection}. The section model acts in the local space defined by the {x} and {yprime} vectors. The section axial force-deformation acts along the element local x-axis and the section y-z axes directly corresponsd to the local element y-z axes.
Definition at line 58 of file ZeroLengthSection.cpp. |
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ZeroLengthSection::ZeroLengthSection (
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This is the constructor invoked by an {\bf FEM\_ObjectBroker} object. It constructs an empty ZeroLengthSection element with two nodes. The {recvSelf()} method is invoked on the object for it to set the internal data.
Definition at line 81 of file ZeroLengthSection.cpp. |
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ZeroLengthSection::~ZeroLengthSection (
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Member Function Documentation
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void ZeroLengthSection::Print (
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ostream & s,
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int flag = 0 ) [virtual]
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int ZeroLengthSection::addInertiaLoadToUnbalance (
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const Vector & accel ) [virtual]
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int ZeroLengthSection::addLoad (
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const Vector & addP ) [virtual]
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int ZeroLengthSection::commitState (
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void ) [virtual]
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int ZeroLengthSection::displaySelf (
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Renderer & theViewer,
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int displayMode,
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float fact ) [virtual]
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const Matrix & ZeroLengthSection::getDamp (
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void ) [virtual]
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const ID & ZeroLengthSection::getExternalNodes (
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void ) [virtual]
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const Matrix & ZeroLengthSection::getMass (
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void ) [virtual]
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int ZeroLengthSection::getNumDOF (
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void ) [virtual]
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Return the number of DOF for the element, which depends on the dimension of the problem and the number of DOF associated with each node.
Reimplemented from Element.
Definition at line 117 of file ZeroLengthSection.cpp. |
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int ZeroLengthSection::getNumExternalNodes (
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void ) const [virtual]
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const Vector & ZeroLengthSection::getResistingForce (
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void ) [virtual]
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Return resisting force vector for element. The element resisting force is computed from the section stress resultants, 
, as 
. The section stress resulant is obtained by calling {getStressResultant()}.
Reimplemented from Element.
Definition at line 295 of file ZeroLengthSection.cpp.
Referenced by getResistingForceIncInertia().
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const Vector & ZeroLengthSection::getResistingForceIncInertia (
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void ) [virtual]
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int ZeroLengthSection::getResponse (
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int responseID,
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Information & eleInformation ) [virtual]
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const Matrix & ZeroLengthSection::getSecantStiff (
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void ) [virtual]
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const Matrix & ZeroLengthSection::getTangentStiff (
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void ) [virtual]
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int ZeroLengthSection::revertToLastCommit (
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void ) [virtual]
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Revert state of element to last commit by reverting to last committed state of the section. Return 0 if successful, !0 otherwise.
Reimplemented from Element.
Definition at line 218 of file ZeroLengthSection.cpp. |
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int ZeroLengthSection::revertToStart (
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void ) [virtual]
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Revert state of element to initial sate by reverting to initial state of the section. Return 0 if successful, !0 otherwise.
Reimplemented from Element.
Definition at line 225 of file ZeroLengthSection.cpp. |
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int ZeroLengthSection::sendSelf (
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int commitTag,
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Channel & theChannel ) [virtual]
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void ZeroLengthSection::setDomain (
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Domain * theDomain ) [virtual]
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Initialize element and define data structures. Sets up the element transformation matrix, 
, which defines the kinematic relationship between nodal displacements and section deformations.
Reimplemented from DomainComponent.
Definition at line 129 of file ZeroLengthSection.cpp. |
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Response * ZeroLengthSection::setResponse (
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char ** argv,
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int argc,
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Information & eleInformation ) [virtual]
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void ZeroLengthSection::zeroLoad (
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void ) [virtual]
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The documentation for this class was generated from the following files:
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Copyright
with the node tags defining the element.