CorotTrussSection.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: 1.7 $ 00022 // $Date: 2006/08/04 19:13:02 $ 00023 // $Source: /usr/local/cvs/OpenSees/SRC/element/truss/CorotTrussSection.h,v $ 00024 00025 #ifndef CorotTrussSection_h 00026 #define CorotTrussSection_h 00027 00028 // Written: MHS 00029 // Created: May 2001 00030 // 00031 // Description: This file contains the class definition for CorotTrussSection, 00032 // a small strain, large displacement corotational space truss element, 00033 // as described by Crisfield in "Nonlinear Finite Element Analysis of 00034 // Solids and Structures", Vol. 1, 1991, J.T. Wiley. 00035 00036 #include <Element.h> 00037 #include <Matrix.h> 00038 #include <Vector.h> 00039 00040 class Node; 00041 class Channel; 00042 class SectionForceDeformation; 00043 00044 class CorotTrussSection : public Element 00045 { 00046 public: 00047 CorotTrussSection(int tag, int dim, 00048 int Nd1, int Nd2, 00049 SectionForceDeformation &theMaterial, 00050 double rho=0.0); 00051 00052 CorotTrussSection(); 00053 ~CorotTrussSection(); 00054 00055 const char *getClassType(void) const {return "CorotTrussSection";}; 00056 00057 // public methods to obtain inforrmation about dof & connectivity 00058 int getNumExternalNodes(void) const; 00059 const ID &getExternalNodes(void); 00060 Node **getNodePtrs(void); 00061 00062 int getNumDOF(void); 00063 void setDomain(Domain *theDomain); 00064 00065 // public methods to set the state of the element 00066 int commitState(void); 00067 int revertToLastCommit(void); 00068 int revertToStart(void); 00069 int update(void); 00070 00071 // public methods to obtain stiffness, mass, damping and residual information 00072 const Matrix &getTangentStiff(void); 00073 const Matrix &getInitialStiff(void); 00074 const Matrix &getMass(void); 00075 00076 void zeroLoad(void); 00077 int addLoad(ElementalLoad *theLoad, double loadFactor); 00078 int addInertiaLoadToUnbalance(const Vector &accel); 00079 00080 const Vector &getResistingForce(void); 00081 const Vector &getResistingForceIncInertia(void); 00082 00083 // public methods for element output 00084 int sendSelf(int commitTag, Channel &theChannel); 00085 int recvSelf(int commitTag, Channel &theChannel, 00086 FEM_ObjectBroker &theBroker); 00087 int displaySelf(Renderer &theViewer, int displayMode, float fact); 00088 void Print(OPS_Stream &s, int flag =0); 00089 00090 Response *setResponse(const char **argv, int argc, Information &eleInfo, OPS_Stream &s); 00091 int getResponse(int responseID, Information &eleInformation); 00092 00093 protected: 00094 00095 private: 00096 00097 // private attributes - a copy for each object of the class 00098 SectionForceDeformation *theSection; // pointer to a material 00099 ID connectedExternalNodes; // contains the tags of the end nodes 00100 int numDOF; // number of dof for CorotTrussSection 00101 int numDIM; // number of dimensions 00102 00103 double Lo; // initial length of truss 00104 double Ln; // current length of truss 00105 double d21[3]; // current displacement offsets in basic system 00106 double rho; // mass density per unit length 00107 00108 Node *theNodes[2]; 00109 00110 Matrix R; // Rotation matrix 00111 00112 Matrix *theMatrix; 00113 00114 static Matrix M2; 00115 static Matrix M4; 00116 static Matrix M6; 00117 static Matrix M12; 00118 00119 Vector *theVector; 00120 00121 static Vector V2; 00122 static Vector V4; 00123 static Vector V6; 00124 static Vector V12; 00125 }; 00126 00127 #endif 00128 00129 00130 00131
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