ZeroLength.hGo to the documentation of this file.00001 /* ****************************************************************** ** 00002 ** OpenSees - Open System for Earthquake Engineering Simulation ** 00003 ** Pacific Earthquake Engineering Research Center ** 00004 ** ** 00005 ** ** 00006 ** (C) Copyright 1999, The Regents of the University of California ** 00007 ** All Rights Reserved. ** 00008 ** ** 00009 ** Commercial use of this program without express permission of the ** 00010 ** University of California, Berkeley, is strictly prohibited. See ** 00011 ** file 'COPYRIGHT' in main directory for information on usage and ** 00012 ** redistribution, and for a DISCLAIMER OF ALL WARRANTIES. ** 00013 ** ** 00014 ** Developed by: ** 00015 ** Frank McKenna (fmckenna@ce.berkeley.edu) ** 00016 ** Gregory L. Fenves (fenves@ce.berkeley.edu) ** 00017 ** Filip C. Filippou (filippou@ce.berkeley.edu) ** 00018 ** ** 00019 ** ****************************************************************** */ 00020 00021 // $Revision: 1.9 $ 00022 // $Date: 2006/08/04 21:50:27 $ 00023 // $Source: /usr/local/cvs/OpenSees/SRC/element/zeroLength/ZeroLength.h,v $ 00024 00025 00026 #ifndef ZeroLength_h 00027 #define ZeroLength_h 00028 00029 // File: ~/element/zeroLength/ZeroLength.h 00030 // 00031 // Written: GLF 00032 // Created: 12/99 00033 // Revision: A 00034 // 00035 // Description: This file contains the class definition for ZeroLength. 00036 // A ZeroLength element is defined by two nodes with the same coordinate. 00037 // One or more material objects may be associated with the nodes to 00038 // provide a force displacement relationship. 00039 // ZeroLength element will work with 1d, 2d, or 3d material models. 00040 // 00041 // What: "@(#) ZeroLength.h, revA" 00042 00043 #include <Element.h> 00044 #include <Matrix.h> 00045 00046 // Tolerance for zero length of element 00047 #define LENTOL 1.0e-6 00048 00049 // Type of dimension of element NxDy has dimension x=1,2,3 and 00050 // y=2,4,6,12 degrees-of-freedom for the element 00051 enum Etype { D1N2, D2N4, D2N6, D3N6, D3N12 }; 00052 00053 00054 class Node; 00055 class Channel; 00056 class UniaxialMaterial; 00057 class Response; 00058 00059 class ZeroLength : public Element 00060 { 00061 public: 00062 00063 // Constructor for a single 1d material model 00064 ZeroLength(int tag, 00065 int dimension, 00066 int Nd1, int Nd2, 00067 const Vector& x, 00068 const Vector& yprime, 00069 UniaxialMaterial& theMaterial, 00070 int direction ); 00071 00072 // Constructor for a multiple 1d material models 00073 ZeroLength(int tag, 00074 int dimension, 00075 int Nd1, int Nd2, 00076 const Vector& x, 00077 const Vector& yprime, 00078 int n1dMat, 00079 UniaxialMaterial** theMaterial, 00080 const ID& direction ); 00081 00082 ZeroLength(); 00083 ~ZeroLength(); 00084 00085 const char *getClassType(void) const {return "ZeroLength";}; 00086 00087 // public methods to obtain inforrmation about dof & connectivity 00088 int getNumExternalNodes(void) const; 00089 const ID &getExternalNodes(void); 00090 Node **getNodePtrs(void); 00091 00092 int getNumDOF(void); 00093 void setDomain(Domain *theDomain); 00094 00095 // public methods to set the state of the element 00096 int commitState(void); 00097 int revertToLastCommit(void); 00098 int revertToStart(void); 00099 int update(void); 00100 00101 // public methods to obtain stiffness, mass, damping and residual information 00102 const Matrix &getTangentStiff(void); 00103 const Matrix &getInitialStiff(void); 00104 const Matrix &getDamp(void); 00105 const Matrix &getMass(void); 00106 00107 void zeroLoad(void); 00108 int addLoad(ElementalLoad *theLoad, double loadFactor); 00109 int addInertiaLoadToUnbalance(const Vector &accel); 00110 00111 const Vector &getResistingForce(void); 00112 const Vector &getResistingForceIncInertia(void); 00113 00114 // public methods for element output 00115 int sendSelf(int commitTag, Channel &theChannel); 00116 int recvSelf(int commitTag, Channel &theChannel, FEM_ObjectBroker &theBroker); 00117 int displaySelf(Renderer &theViewer, int displayMode, float fact); 00118 void Print(OPS_Stream &s, int flag =0); 00119 00120 Response *setResponse(const char **argv, int argc, Information &eleInformation, OPS_Stream &s); 00121 int getResponse(int responseID, Information &eleInformation); 00122 00123 void updateDir (const Vector& x, const Vector& y); 00124 00125 protected: 00126 00127 private: 00128 Etype elemType; 00129 00130 // private methods 00131 void setUp ( int Nd1, int Nd2, const Vector& x, const Vector& y); 00132 void checkDirection ( ID& dir ) const; 00133 00134 void setTran1d ( Etype e, int n ); 00135 double computeCurrentStrain1d ( int mat, const Vector& diff ) const; 00136 00137 // private attributes - a copy for each object of the class 00138 ID connectedExternalNodes; // contains the tags of the end nodes 00139 int dimension; // = 1, 2, or 3 dimensions 00140 int numDOF; // number of dof for ZeroLength 00141 Matrix transformation; // transformation matrix for orientation 00142 00143 Node *theNodes[2]; 00144 00145 Matrix *theMatrix; // pointer to objects matrix (a class Matrix) 00146 Vector *theVector; // pointer to objects vector (a class Vector) 00147 00148 // Storage for uniaxial material models 00149 int numMaterials1d; // number of 1d materials 00150 UniaxialMaterial **theMaterial1d; // array of pointers to 1d materials 00151 ID *dir1d; // array of directions 0-5 for 1d materials 00152 Matrix *t1d; // hold the transformation matrix 00153 00154 // static data - single copy for all objects of the class 00155 static Matrix ZeroLengthM2; // class wide matrix for 2*2 00156 static Matrix ZeroLengthM4; // class wide matrix for 4*4 00157 static Matrix ZeroLengthM6; // class wide matrix for 6*6 00158 static Matrix ZeroLengthM12; // class wide matrix for 12*12 00159 static Vector ZeroLengthV2; // class wide Vector for size 2 00160 static Vector ZeroLengthV4; // class wide Vector for size 4 00161 static Vector ZeroLengthV6; // class wide Vector for size 6 00162 static Vector ZeroLengthV12; // class wide Vector for size 12 00163 }; 00164 00165 #endif 00166 00167 00168 00169
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