XC::ZeroLengthSection Class Reference

Zero length element with SectionForceDeformation material. More...

#include <ZeroLengthSection.h>

Inheritance diagram for XC::ZeroLengthSection:

Collaboration diagram for XC::ZeroLengthSection:

Public Member Functions
	ZeroLengthSection (int tag, int dimension, int Nd1, int Nd2, const Vector &x, const Vector &yprime, SectionForceDeformation &theSection)
	Constructor. More...
	ZeroLengthSection (int tag, int dimension, const Material *theSection)
	Constructor: More...
	ZeroLengthSection (void)
	Default constructor.
	ZeroLengthSection (const ZeroLengthSection &)
	Copy constructor.
ZeroLengthSection &	operator= (const ZeroLengthSection &)
	Assignment operator.
Element *	getCopy (void) const
	Virtual constructor.
	~ZeroLengthSection (void)
	Destructor.
void	setDomain (Domain *theDomain)
	Set the enclosing domain. More...
int	getOrder (void) const
int	update (void)
	Update element state.
int	commitState (void)
	Commit state of element by committing state of the section. More...
int	revertToLastCommit (void)
	Revert state of element to last commit by reverting to last committed state of the section. More...
int	revertToStart (void)
	Revert state of element to initial state by reverting to initial state of the section. More...
const Matrix &	getInternalForcesTransformation (void) const
	Return the matrix that transforms internal forces into element reactions.
void	setUpVectors (const Vector &, const Vector &)
	Set up the transformation matrix for orientation. More...
const Matrix &	getTangentStiff (void) const
	Return the tangent stiffness matrix. More...
const Matrix &	getInitialStiff (void) const
	Return tangent stiffness matrix for element. More...
void	alive (void)
	Reactivates the element.
int	addLoad (ElementalLoad *theLoad, double loadFactor)
	The element has no loads, so this operation has no effect and returns 0.
int	addInertiaLoadToUnbalance (const Vector &accel)
	The element has no mass, so this operation has no effect and returns 0.
const Vector &	getResistingForce (void) const
	Return resisting force vector for element. More...
const Vector &	getResistingForceIncInertia (void) const
	Returns the result of getResistingForce() as there is no element mass.
Vector	getVDirStrongAxisLocalCoord (void) const
	Returns the direction vector of element strong axis expressed in the local coordinate system. More...
Vector	getVDirWeakAxisLocalCoord (void) const
	Returns the direction vector of element weak axis expressed in the local coordinate system. More...
double	getStrongAxisAngle (void) const
	Returns the angle between element strong axis and local XZ plane. More...
double	getWeakAxisAngle (void) const
	Returns the angle between element weak axis and local XZ plane. More...
const Vector &	getVDirStrongAxisGlobalCoord (bool initialGeometry) const
	Returns the direction vector of element strong axis expressed in the global coordinate system. More...
const Vector &	getVDirWeakAxisGlobalCoord (bool initialGeometry) const
	Returns the direction vector of element weak axis expressed in the global coordinate system. More...
SectionForceDeformation *	getSection (void)
int	sendSelf (Communicator &)
	Sends object through the communicator argument.
int	recvSelf (const Communicator &)
	Receives object through the communicator argument.
void	Print (std::ostream &s, int flag=0) const
	Prints the element node tags and section model to the stream {em s}.
Response *	setResponse (const std::vector< std::string > &argv, Information &eleInformation)
	setResponse() is a method invoked to determine if the element will respond to a request for a certain of information. More...
int	getResponse (int responseID, Information &eleInformation)
	Obtain information from an analysis. More...
const Vector &	getResistingForceSensitivity (int gradIndex)
int	commitSensitivity (int gradIndex, int numGrads)
Public Member Functions inherited from XC::Element0D
	Element0D (int tag, int classTag, int Nd1, int Nd2)
	Constructor. More...
	Element0D (int tag, int classTag, int Nd1, int Nd2, int dim)
	Constructor. More...
	Element0D (int tag, int classTag, int Nd1, int Nd2, int dim, const Vector &, const Vector &)
	Constructor. More...
BoolArray3d	getNodePattern (void) const
	Return a grid of booleans, one for each of the element nodes. More...
int	getNumDOF (void) const
	Return the number of degrees of freedom. More...
size_t	getDimension (void) const
	Return the element dimension (0, 1, 2 o3 3).
int	getVtkCellType (void) const
	VTK interface.
const Vector &	getX (void) const
	Returns the direction vector of local X axis (first row of the transformation).
const Vector &	getY (void) const
	Returns the direction vector of local Y axis (second row of the transformation).
const Vector &	getZ (void) const
	Returns the direction vector of local Z axis (third row of the transformation).
Matrix	getLocalAxes (bool) const
	Returns a matrix with the axes of the element as matrix rows [[x1,y1,z1],[x2,y2,z2],...·].
Rect3d3dCooSys	getCooSys (bool) const
	Returns the element coordinate system.
virtual const Matrix &	getTransformation (void) const
Pos2d	getProjection (const Pos2d &p, bool initialGeometry=true) const
	Return the projection of the argument on the element. More...
Pos3d	getProjection (const Pos3d &p, bool initialGeometry=true) const
	Return the projection of the argument on the element. More...
virtual const Matrix &	getExtrapolationMatrix (void) const
boost::python::dict	getPyDict (void) const
	Return a Python dictionary with the object members values.
void	setPyDict (const boost::python::dict &)
	Set the values of the object members from a Python dictionary.
Public Member Functions inherited from XC::ElementBase< 2 >
	ElementBase (int tag, int classTag)
	Default constructor.
	ElementBase (const ElementBase &)
	Copy constructor.
ElementBase &	operator= (const ElementBase &)
	Assignment operator.
int	getNumExternalNodes (void) const
	Return the number of external nodes.
NodePtrsWithIDs &	getNodePtrs (void)
	Returns a pointer to the node vector.
const NodePtrsWithIDs &	getNodePtrs (void) const
	Returns a pointer to the node vector.
Pos3d	getCenterOfMassPosition (bool initialGeometry=true) const
	Return position of the element centroid.
boost::python::dict	getPyDict (void) const
	Return a Python dictionary with the object members values.
void	setPyDict (const boost::python::dict &)
	Set the values of the object members from a Python dictionary.
Public Member Functions inherited from XC::Element
	Element (int tag, int classTag)
	Constructor that takes the element's unique tag and the number of external nodes for the element. More...
virtual int	getNumEdges (void) const
	Returns number of edges (it must be overloaded for elements that have nodes inside edges. More...
std::vector< int >	getIdxNodes (void) const
	Return the indexes of the nodes (used when creating VTK meshes). More...
virtual double	getLength (bool initialGeometry=true) const
	Return the element length. More...
virtual double	getArea (bool initialGeometry=true) const
	Return the element area. More...
virtual double	getVolume (bool initialGeometry=true) const
	Return the element volume. More...
virtual void	setIdNodes (const std::vector< int > &inodes)
	Set the nodes.
virtual void	setIdNodes (const ID &inodes)
	Set the nodes.
virtual void	setIdNode (const int &i, const int &inode)
	Set the i-th node.
int	find (const Node *) const
	Returns the index of the node whose pointer is being passed as parameter. More...
void	replaceNode (Node *, Node *)
	Replace the old node by the new one. More...
virtual bool	isSubdomain (void)
	Returns true if the element is a subdomain.
virtual const Matrix &	getDamp (void) const
	Returns the damping matrix. More...
virtual const Matrix &	getMass (void) const
	Returns the mass matrix. More...
virtual Matrix	getMass (const Node *) const
	Returns the mass matrix corresponding to the node argument.
Matrix	getTotalMass (void) const
	Returns the sum of the mass matrices corresponding to the nodes.
double	getTotalMassComponent (const int &) const
	Return the mass matrix component for the DOF argument.
Matrix	getNodeMatrixComponents (const Node *, const Matrix &) const
	Returns the components of the matrix relative to the node. More...
virtual void	zeroLoad (void)
	Zeroes the loads over the element. More...
virtual void	createInertiaLoad (const Vector &)
	Creates the inertia load that corresponds to the acceleration argument. More...
virtual int	setRayleighDampingFactors (const RayleighDampingFactors &rF) const
	Set Rayleigh damping factors.
const Vector &	getNodeResistingComponents (const size_t &, const Vector &) const
	Returns the generalized force of the element over the iNod-th node. More...
const Vector &	getNodeResistingForce (const size_t &iNod) const
	Returns the generalized force of the element over the iNod-th node. More...
const Vector &	getNodeResistingForceIncInertia (const size_t &iNod) const
	Returns the generalized force (including inertia forces) of the element over the node identified by the argument. More...
const Vector &	getNodeResistingForce (const Node *) const
	Returns the generalized force of the element over the node identified by the argument. More...
const Vector &	getNodeResistingForceIncInertia (const Node *) const
	Returns the generalized force (including inertia forces) of the element over the node identified by the argument. More...
const Vector &	getNodeResistingForceByTag (const int &) const
	Returns the generalized force of the element over the node identified by the given integer. More...
const Vector &	getNodeResistingForceIncInertiaByTag (const int &) const
	Returns the generalized force (including inertia forces) of the element over the node identified by the given integer. More...
Vector	getEquivalentStaticLoad (int mode, const double &) const
	Returns the equivalent static load for the mode being passed as parameter and the acceleration that corresponding that mode. More...
Matrix	getEquivalentStaticNodalLoads (int mode, const double &) const
	Returns the equivalent static load on each node for the mode being passed as parameter and the corresponding acceleration to the mode. More...
Response *	setMaterialResponse (Material *, const std::vector< std::string > &, const size_t &, Information &)
virtual int	addInertiaLoadSensitivityToUnbalance (const Vector &accel, bool tag)
virtual int	setParameter (const std::vector< std::string > &argv, Parameter &param)
	Sets the value param to the parameter argv.
int	setMaterialParameter (Material *, const std::vector< std::string > &, const size_t &, Parameter &)
	Set the value of a parameter of the material. More...
virtual int	updateParameter (int parameterID, Information &info)
	Updates the parameter identified by parameterID with info.
virtual int	activateParameter (int parameterID)
	Activates the parameter identified by parameterID.
virtual const Matrix &	getInitialStiffSensitivity (int gradNumber)
virtual const Matrix &	getDampSensitivity (int gradNumber)
virtual const Matrix &	getMassSensitivity (int gradNumber)
virtual int	addResistingForceToNodalReaction (bool inclInertia)
	Adds nodal reactions.
double	MaxCooNod (int i) const
	Returns the maximum value of the i coordinate of the element nodes.
double	MinCooNod (int i) const
	Returns the minimum value of the i coordinate of the element nodes.
const Matrix &	getCooNodes (void) const
	Returns the coordinates of the nodes.
virtual Vector	getBaseVector (size_t i, bool initialGeometry=true) const
	Returns a base vector in the direction of the local i-th axis from the i-th row of the matrix returned by getLocalAxes. More...
virtual Vector3d	getBaseVector3d (size_t i, bool initialGeometry=true) const
	Returns a base vector in the direction of the local i-th axis from the i-th row of the matrix returned by getLocalAxes. More...
virtual Vector3d	getIVector3d (bool initialGeometry=true) const
	Returns a vector in the direction of the local x axis from the first row of the matrix returned by getLocalAxes. More...
virtual Vector3d	getJVector3d (bool initialGeometry=true) const
	Returns a vector in the direction of the local y axis from the second row of the matrix returned by getLocalAxes. More...
virtual Vector3d	getKVector3d (bool initialGeometry=true) const
	Returns a vector in the direction of the local z axis from the third row of the matrix returned by getLocalAxes. More...
virtual Rect2d2dCooSys	getCooSys2d (bool) const
	Returns the element coordinate system from the matrix returned by getLocalAxes. More...
Pos3d	getPosNode (const size_t &i, bool initialGeometry=true) const
	Returns the position of the i-th node. More...
std::deque< Pos3d >	getPosNodes (bool initialGeometry=true) const
	Returns the coordinates of the nodes. More...
Vector	getCenterOfMassCoordinates (bool initialGeometry=true) const
	Returns the coordinates of the center of mass of the element. More...
Pos3dArray3d	getPoints (const size_t &ni, const size_t &nj, const size_t &nk, bool initialGeometry=true)
	Returns a grid of points distributed along the element. More...
bool	In (const GeomObj3d &, const double &factor=1.0, const double &tol=0.0) const
	Return true if the element is inside the given object.
bool	Out (const GeomObj3d &, const double &factor=1.0, const double &tol=0.0) const
	Return true if the element is outside the given object.
bool	In (const GeomObj2d &, const double &factor=1.0, const double &tol=0.0) const
	Return true if the element is inside the given object.
bool	Out (const GeomObj2d &, const double &factor=1.0, const double &tol=0.0) const
	Return true if the element is outside the given object.
bool	Crosses (const GeomObj3d &, const double &factor=1.0, const double &tol=0.0) const
	Return true if the element cross (i.e. More...
bool	Crosses (const GeomObj2d &, const double &factor=1.0, const double &tol=0.0) const
	Return true if the element cross (i.e. More...
virtual double	getDist2 (const Pos2d &p, bool initialGeometry=true) const
	Returns the squared distance from the element to the point being passed as parameter. More...
virtual double	getDist (const Pos2d &p, bool initialGeometry=true) const
	Returns the the distance from the element to the point being passed as parameter. More...
virtual double	getDist2 (const Pos3d &p, bool initialGeometry=true) const
	Returns the squared distance from the element to the point being passed as parameter. More...
virtual double	getDist (const Pos3d &p, bool initialGeometry=true) const
	Returns the the distance from the element to the point being passed as parameter. More...
void	resetTributaries (void) const
	Resets tributary areas of connected nodes.
void	dumpTributaries (const std::vector< double > &) const
	Adds to the tributary magnitude of each node the vector being passed as parameter. More...
virtual void	computeTributaryLengths (bool initialGeometry=true) const
	Computes the tributary lengths that corresponds to each node of the element. More...
virtual double	getTributaryLength (const Node *) const
	Returns the tributary length corresponding to the node being passed as parameter. More...
virtual double	getTributaryLengthByTag (const int &) const
	Returns the tributary length corresponding to the node which tag se pasa as parameter. More...
virtual void	computeTributaryAreas (bool initialGeometry=true) const
	Compute tributary areas for each element node. More...
virtual double	getTributaryArea (const Node *) const
	Returns the tributary area corresponding to the node.
virtual double	getTributaryAreaByTag (const int &) const
	Returns the tributary area corresponding to the node.
virtual void	computeTributaryVolumes (bool initialGeometry=true) const
	Computes the tributary volumes that corresponds to each node of the element. More...
virtual double	getTributaryVolume (const Node *) const
	Returns the tributary volume corresponding to the node being passed as parameter. More...
virtual double	getTributaryVolumeByTag (const int &) const
	Returns the tributary volume corresponding to the node which tag se pasa as parameter. More...
virtual ParticlePos3d	getNaturalCoordinates (const Pos3d &, bool initialGeometry=true) const
	Return the natural coordinates that correspond to the given position. More...
virtual Vector	getInterpolationFactors (const ParticlePos3d &) const
	Returns interpolation factors for a material point.
virtual Vector	getInterpolationFactors (const Pos3d &) const
	Returns interpolation factors for a material point.
virtual const GaussModel &	getGaussModel (void) const
	Returns the Gauss integration model of the element.
virtual NodesEdge	getNodesEdge (const size_t &) const
	Returns the nodes of the element edge.
virtual int	getEdgeNodes (const Node *, const Node *) const
	Returns the edge of the element that ends in the nodes being passed as parameters. More...
int	getEdgeNodes (const int &, const int &) const
	Returns the edge of the element that ends in the nodes with the tags being passed as parameters. More...
virtual ID	getEdgesNode (const Node *) const
	Returns the edges of the element that ends in the node being passed as parameter. More...
std::set< int >	getEdgesNodes (const NodePtrSet &) const
	Returns the element edges that have both ends in the node set being passed as parameter. More...
ID	getEdgesNodeByTag (const int &) const
	Returns the edges of the element that have an en in the node with the tag being passed as parameter. More...
virtual ID	getLocalIndexNodesEdge (const size_t &i) const
	Returns the local indexes of the element nodes that lie over the i-th edge. More...
virtual std::set< std::string >	getMaterialNames (void) const
	Return the names of the material(s) of the element.
boost::python::list	getMaterialNamesPy (void) const
	Return the names of the material(s) of the element in a Python list.
virtual boost::python::list	getValuesAtNodes (const std::string &, bool silent=false) const
	Return a python list with the values of the argument property at element nodes. More...
std::set< SetBase * >	get_sets (void) const
	Returns the sets to which the element belongs.
void	add_to_sets (std::set< SetBase *> &)
	Adds the element to the sets being passed as parameters.
void	copySetsFrom (const Element &)
	Add this element to all the sets containing the given one.
Public Member Functions inherited from XC::MeshComponent
	MeshComponent (int classTag)
	Constructor.
	MeshComponent (int tag, int classTag)
	Constructor.
Public Member Functions inherited from XC::ContinuaReprComponent
	ContinuaReprComponent (int classTag)
	ContinuaReprComponent (int tag, int classTag)
virtual const bool	isDead (void) const
	Return true if the component is not active.
virtual const bool	isAlive (void) const
	Return true if the component is active.
virtual void	kill (void)
	Deactivates the component.
Public Member Functions inherited from XC::DomainComponent
	~DomainComponent (void)
	Destructor.
size_t	getIdx (void) const
	Returns the index of the object (to be used in VTK arrays).
virtual Domain *	getDomain (void) const
	Returns a pointer to the enclosing domain. More...
const Preprocessor *	getPreprocessor (void) const
	Returns (if possible) a pointer to the preprocessor.
Preprocessor *	getPreprocessor (void)
	Return (if possible) a pointer to the preprocessor.
const LoadPattern *	getCurrentLoadPattern (void) const
	Return the current load pattern.
LoadPattern *	getCurrentLoadPattern (void)
	Return the current load pattern.
void	set_index (const size_t &i)
	Set the index for the object (see numera in Set). More...
Public Member Functions inherited from XC::TaggedObject
	TaggedObject (int tag, CommandEntity *owr=nullptr)
	Constructor. More...
void	assignTag (int newTag)
	Set tag (to be called from Python interface).
int	getTag (void) const
	Returns the tag associated with the object.
Public Member Functions inherited from CommandEntity
	CommandEntity (CommandEntity *owr=nullptr)
	Default constructor.
CommandEntity *	Owner (void)
	Return a pointer to the object owner.
const CommandEntity *	Owner (void) const
	Return un puntero al objeto propietario de ESTE.
const StandardOutputWrapper &	getStandardOutputWrapper (void) const
	Return the regular output stream wrapper.
StandardOutputWrapper &	getStandardOutputWrapper (void)
	Return the regular output stream wrapper.
const std::string &	getLogFileName (void) const
	Returns log file name.
void	setLogFileName (const std::string &)
	Sets log file name.
const std::string &	getErrFileName (void) const
	Returns err file name.
void	setErrFileName (const std::string &)
	Sets error file name.
const std::string &	getOutputFileName (void) const
	Returns regular output file name.
void	setOutputFileName (const std::string &)
	Sets regular output file name.
boost::python::object	evalPy (boost::python::object dict, const std::string &)
	Return the Python object that results from evaluating the argument.
boost::python::object	execPy (boost::python::object dict, const std::string &)
	Return the Python objects that results from executing the code in the string argument.
boost::python::object	execFilePy (boost::python::object dict, const std::string &)
	Return the Python object that results from executing the code in the file.
Public Member Functions inherited from EntityWithProperties
	EntityWithProperties (EntityWithProperties *owr=nullptr)
	Default constructor.
void	clearPyProps (void)
	Clear python properties map.
bool	hasPyProp (const std::string &)
	Returns true if property exists.
boost::python::object	getPyProp (const std::string &str)
	Return the Python object with the name being passed as parameter.
void	setPyProp (std::string str, boost::python::object val)
	Sets/appends a value tho the Python object's dictionary.
void	copyPropsFrom (const EntityWithProperties &)
	Copy the properties from the argument.
boost::python::list	getPropNames (void) const
	Return the names of the object properties weightings.
const PythonDict &	getPropertiesDict (void) const
	Return a std::map container with the properties of the object.
Public Member Functions inherited from EntityWithOwner
	EntityWithOwner (EntityWithOwner *owr=nullptr)
	Default constructor.
	EntityWithOwner (const EntityWithOwner &)
	Copy constructor.
EntityWithOwner &	operator= (const EntityWithOwner &)
	Assignment operator.
virtual bool	operator== (const EntityWithOwner &) const
	Comparison operator.
virtual	~EntityWithOwner (void)
	Virtual destructor.
virtual std::string	getClassName (void) const
	Returns demangled class name.
void	set_owner (EntityWithOwner *owr)
	Assigns the owner of the object.
EntityWithOwner *	Owner (void)
const EntityWithOwner *	Owner (void) const
Public Member Functions inherited from XC::MovableObject
	MovableObject (int classTag, int dbTag)
	Constructor. More...
	MovableObject (int classTag)
	Constructor. More...
	MovableObject (const MovableObject &)
	Copy constructor. Doesn't copy the dbTag.
MovableObject &	operator= (const MovableObject &)
	Assignment operator. Doesn't copy the dbTag.
int	getClassTag (void) const
	Return the class identifier.
int	getDbTag (void) const
	Return the object identifier in the database.
int	getDbTag (Communicator &)
	Return the object identifier in the database.
void	setDbTag (int dbTag)
	Sets the object identifier in the database.
void	setDbTag (Communicator &)
	Sets the object identifier in the database if not already set. More...
virtual int	setVariable (const std::string &variable, Information &)
	Set the value of the variable idenfified by var.
virtual int	getVariable (const std::string &variable, Information &)
	Return the value of the variable idenfified by var.
Public Member Functions inherited from XC::DistributedBase
	DistributedBase (void)
	Constructor.
virtual	~DistributedBase (void)
	Destructor.
virtual DbTagData &	getDbTagData (void) const
	Returns a vector to store class dbTags.
const int &	getDbTagDataPos (const int &i) const
	Returns the data at the i-th position.
void	setDbTagDataPos (const int &i, const int &v)
	Sets the data at the i-th position.
void	inicComm (const int &dataSize) const
	Initializes communication.

Protected Member Functions
int	sendData (Communicator &)
	Send members through the communicator argument.
int	recvData (const Communicator &)
	Receives members through the communicator argument.
Protected Member Functions inherited from XC::Element0D
virtual void	setUp (int Nd1, int Nd2, const Vector &x, const Vector &y)
	Establish the external nodes and set up the transformation matrix for orientation. More...
ElemPtrArray3d	sew (const SetEstruct &f1, const SetEstruct &f2) const
int	sendData (Communicator &comm)
	Send members through the communicator argument.
int	recvData (const Communicator &comm)
	Receives members through the communicator argument.
Protected Member Functions inherited from XC::ElementBase< 2 >
TIPOMAT *	cast_material (const Material *ptr_mat)
	Casts the material pointer to a suitable type.
int	sendData (Communicator &comm)
	Send members through the communicator argument.
int	recvData (const Communicator &comm)
	Receives members through the communicator argument.
Protected Member Functions inherited from XC::Element
virtual ElemPtrArray3d	put_on_mesh (const NodePtrArray3d &, meshing_dir) const
	Places the element on the mesh.
const Vector &	getRayleighDampingForces (void) const
	Returns element Rayleigh damping forces.
const Material *	get_material_ptr (const std::string &) const
	Return a pointer to the material that corresponds to the name. More...
int	sendData (Communicator &comm)
	Sends object members through the communicator argument.
int	recvData (const Communicator &comm)
	Receives object members through the communicator argument.
Protected Member Functions inherited from XC::MeshComponent
void	setup_matrices (std::deque< Matrix > &, const int &) const
	Initializes the matrix container.
int	sendIdsLabels (int posDbTag, Communicator &)
	Send labelsthrough the communicator argument.
int	recvIdsLabels (int posDbTag, const Communicator &)
	Receive labels through the communicator argument.
int	sendData (Communicator &)
	Send members through the communicator argument.
int	recvData (const Communicator &)
	Receives members through the communicator argument.
Protected Member Functions inherited from XC::ContinuaReprComponent
int	sendData (Communicator &)
	Send members through the communicator argument.
int	recvData (const Communicator &)
	Receives members through the communicator argument.
Protected Member Functions inherited from XC::DomainComponent
	DomainComponent (int tag, int classTag)
	Constructor. More...
int	sendData (Communicator &)
	Send object members through the communicator argument.
int	recvData (const Communicator &)
	Receive object members through the communicator argument.
Protected Member Functions inherited from XC::TaggedObject
void	setTag (int newTag)
	Set tag. More...
bool	isEqual (const TaggedObject &) const
	Return true if both objects are equal.
Protected Member Functions inherited from CommandEntity
template<class T >
void	string_to (T &, const std::string &) const
Protected Member Functions inherited from EntityWithProperties
bool	isEqual (const EntityWithProperties &) const
	Return true if both objects are equal.
Protected Member Functions inherited from EntityWithOwner
virtual bool	isEqual (const EntityWithOwner &) const
	Return true if both objects are equal.

Additional Inherited Members
Public Types inherited from XC::Element
typedef std::vector< const Node * >	NodesEdge
	Nodes on an element edge. More...
Public Types inherited from EntityWithProperties
typedef std::map< std::string, boost::python::object >	PythonDict
Static Public Member Functions inherited from XC::ElementBase< 2 >
static const int	numNodes (void)
	Returns the element number of nodes.
Static Public Member Functions inherited from XC::Element
static void	setDeadSRF (const double &d)
	Assigns Stress Reduction Factor for element deactivation.
static DefaultTag &	getDefaultTag (void)
	Returns next element's tag value by default.
Static Public Member Functions inherited from CommandEntity
static void	resetStandardOutput (void)
	Reset the standard output streams to its defaults buffers.
Static Public Member Functions inherited from EntityWithOwner
static int	getVerbosityLevel (void)
	Get the value of the verbosity level.
static void	setVerbosityLevel (const int &)
	Set the value of the verbosity level.
Static Public Attributes inherited from XC::Element
static double	dead_srf = 1e-6
	Stress reduction factor for foozen elements.
Static Protected Member Functions inherited from CommandEntity
static CommandEntity *	entcmd_cast (boost::any &data)
Protected Attributes inherited from XC::Element0D
int	dimension
	= 2 or 3 dimensions
int	numDOF
	number of dof for ZeroLengthSection
Matrix	transformation
	transformation matrix for orientation
Protected Attributes inherited from XC::ElementBase< 2 >
NodePtrsWithIDs	theNodes
	pointers to node.
Protected Attributes inherited from XC::Element
Vector	load
	vector for applied nodal loads.
RayleighDampingFactors	rayFactors
	Rayleigh damping factors.
Matrix	Kc
	pointer to hold last committed matrix if needed for rayleigh damping
Protected Attributes inherited from XC::MeshComponent
int	index
	Index for VTK arrays.
LabelContainer	labels
	Label container.
Static Protected Attributes inherited from XC::Element0D
static Matrix	extrapolation_matrix
	Extrapolation matrix.
static const double	LenTol = 1.0e-6
	Tolerance for zero length of element.
Static Protected Attributes inherited from EntityWithOwner
static int	verbosity = 1
	Object that owns THIS ONE. More...

Detailed Description

Zero length element with SectionForceDeformation material.

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 material which represents the force-deformation relationship for the element. ZeroLengthSection elements are constructed 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. 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.

Constructor & Destructor Documentation

ZeroLengthSection() [1/2]

XC::ZeroLengthSection::ZeroLengthSection	(	int	tag,
		int	dim,
		int	Nd1,
		int	Nd2,
		const Vector &	x,
		const Vector &	yprime,
		SectionForceDeformation &	sec
	)

Constructor.

Parameters

tag	element identifier.
dim	space dimension (1, 2 or 3).
Nd1	identifier of the first node.
Nd2	identifier of the second node.
x	Vector that defines the local x-axis.
yprime	Vector that defines the local x-y plane.
sec	SectionForceDeformation material for the element.

ZeroLengthSection() [2/2]

XC::ZeroLengthSection::ZeroLengthSection	(	int	tag,
		int	dim,
		const Material *	sec
	)

Constructor:

Parameters

tag	element identifier.
dim	space dimension (1, 2 or 3).
sec	SectionForceDeformation material for the element.

Member Function Documentation

commitState()

int XC::ZeroLengthSection::commitState ( void  )

virtual

Commit state of element by committing state of the section.

Return 0 if successful, !0 otherwise.

Reimplemented from XC::Element.

getInitialStiff()

const XC::Matrix & XC::ZeroLengthSection::getInitialStiff ( void  ) const

virtual

Return tangent stiffness matrix for element.

The element tangent is computed from the section tangent matrix, \(k_b\), as \(K_e = A^T k_b A\).

Implements XC::Element.

getResistingForce()

const XC::Vector & XC::ZeroLengthSection::getResistingForce ( void  ) const

virtual

Return resisting force vector for element.

The element resisting force is computed from the section stress resultants, \(s\), as \(P_e = A^T s\). The section stress resulant is obtained by calling getStressResultant().

Implements XC::Element.

getResponse()

int XC::ZeroLengthSection::getResponse ( int  responseID, Information &  eleInfo  )

virtual

Obtain information from an analysis.

getResponse is a method invoked to obtain information from an analysis. The method is invoked with the integer argument returned and the Information object that was prepared in a successful {setResponse()} method invocation. To return \(0\) if successful, a negative number if not. The base class implementation will always return \(-1\).

Reimplemented from XC::Element.

getStrongAxisAngle()

double XC::ZeroLengthSection::getStrongAxisAngle

(

void

)

const

Returns the angle between element strong axis and local XZ plane.

getTangentStiff()

const XC::Matrix & XC::ZeroLengthSection::getTangentStiff ( void  ) const

virtual

Return the tangent stiffness matrix.

To return the tangent stiffness matrix. The element is to compute its stiffness matrix based on the original location of the nodes and the current trial displacement at the nodes.

\[ K_e = {\frac{\partial f_{R_i}}{\partial U} \vert}_{U_{trial}} \]

Implements XC::Element.

getVDirStrongAxisGlobalCoord()

const XC::Vector & XC::ZeroLengthSection::getVDirStrongAxisGlobalCoord

(

bool

initialGeometry

)

const

Returns the direction vector of element strong axis expressed in the global coordinate system.

getVDirStrongAxisLocalCoord()

XC::Vector XC::ZeroLengthSection::getVDirStrongAxisLocalCoord

(

void

)

const

Returns the direction vector of element strong axis expressed in the local coordinate system.

getVDirWeakAxisGlobalCoord()

const XC::Vector & XC::ZeroLengthSection::getVDirWeakAxisGlobalCoord

(

bool

initialGeometry

)

const

Returns the direction vector of element weak axis expressed in the global coordinate system.

getVDirWeakAxisLocalCoord()

XC::Vector XC::ZeroLengthSection::getVDirWeakAxisLocalCoord

(

void

)

const

Returns the direction vector of element weak axis expressed in the local coordinate system.

getWeakAxisAngle()

double XC::ZeroLengthSection::getWeakAxisAngle

(

void

)

const

Returns the angle between element weak axis and local XZ plane.

revertToLastCommit()

int XC::ZeroLengthSection::revertToLastCommit ( void  )

virtual

Revert state of element to last commit by reverting to last committed state of the section.

Return 0 if successful, !0 otherwise.

Implements XC::Element.

revertToStart()

int XC::ZeroLengthSection::revertToStart ( void  )

virtual

Revert state of element to initial state by reverting to initial state of the section.

Return 0 if successful, !0 otherwise.

Reimplemented from XC::Element.

setDomain()

void XC::ZeroLengthSection::setDomain ( Domain *  theDomain )

virtual

Set the enclosing domain.

Set a link to the enclosing Domain and to set the node pointers. also determines the number of dof associated with the XC::ZeroLengthSection element, we set matrix and vector pointers, allocate space for t matrix and define it as the basic deformation- displacement transformation matrix.

Reimplemented from XC::Element.

setResponse()

XC::Response * XC::ZeroLengthSection::setResponse ( const std::vector< std::string > &  argv, Information &  eleInfo  )

virtual

setResponse() is a method invoked to determine if the element will respond to a request for a certain of information.

The information requested of the element is passed in the array of char pointers argv of length {em argc}. If the element does not respond to the request a \(-1\) is returned. If it does respond, an integer value greater than or equal to \(0\) is returned. This is the responseID passed in the getResponse() method. In addition the Element object is responsible for setting the Information object eleInformation with the type of the return, i.e. {IntType, DoubleType, MatrixType, VectorType, IDType}, and for creating a Matrix, Vector or ID object for the Information object, if the information to be returned is of any of these types. The information object is responsible for invoking the destructor on these objects. The base class responds to no requests and will always return \(-1\).

Reimplemented from XC::Element.

setUpVectors()

void XC::ZeroLengthSection::setUpVectors ( const Vector &  x, const Vector &  yp  )

virtual

Set up the transformation matrix for orientation.

Parameters

x	vector components in global coordinates defining local x-axis (vector x)
yp	vector components in global coordinates defining vector yp which lies in the local x-y plane for the element. The local z-axis is defined by the cross product between the vectors x and yp

Reimplemented from XC::Element0D.

---

The documentation for this class was generated from the following files:

• src/domain/mesh/element/zero_length/ZeroLengthSection.h
• src/domain/mesh/element/zero_length/ZeroLengthSection.cpp