TrussSection.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: 1.11 $ 00022 // $Date: 2006/09/05 21:15:19 $ 00023 // $Source: /usr/local/cvs/OpenSees/SRC/element/truss/TrussSection.h,v $ 00024 00025 00026 #ifndef TrussSection_h 00027 #define TrussSection_h 00028 00029 // Written: fmk 00030 // Created: 07/98 00031 // Revision: A 00032 // 00033 // Description: This file contains the class definition for Truss. A Truss 00034 // object provides the abstraction of the small deformation bar element. 00035 // Each truss object is assocaited with a section object. This Truss element 00036 // will work in 1d, 2d or 3d problems. 00037 // 00038 // What: "@(#) Truss.h, revA" 00039 00040 #include <Element.h> 00041 #include <Matrix.h> 00042 00043 class Node; 00044 class Channel; 00045 class SectionForceDeformation; 00046 00047 class TrussSection : public Element 00048 { 00049 public: 00050 TrussSection(int tag, 00051 int dimension, 00052 int Nd1, int Nd2, 00053 SectionForceDeformation &theSection, 00054 double rho=0.0); 00055 00056 TrussSection(); 00057 ~TrussSection(); 00058 00059 const char *getClassType(void) const {return "TrussSection";}; 00060 00061 // public methods to obtain inforrmation about dof & connectivity 00062 int getNumExternalNodes(void) const; 00063 const ID &getExternalNodes(void); 00064 Node **getNodePtrs(void); 00065 00066 int getNumDOF(void); 00067 void setDomain(Domain *theDomain); 00068 00069 // public methods to set the state of the element 00070 int commitState(void); 00071 int revertToLastCommit(void); 00072 int revertToStart(void); 00073 int update(void); 00074 00075 // public methods to obtain stiffness, mass, damping and residual information 00076 const Matrix &getTangentStiff(void); 00077 const Matrix &getInitialStiff(void); 00078 const Matrix &getMass(void); 00079 00080 void zeroLoad(void); 00081 int addLoad(ElementalLoad *theLoad, double loadFactor); 00082 int addInertiaLoadToUnbalance(const Vector &accel); 00083 00084 const Vector &getResistingForce(void); 00085 const Vector &getResistingForceIncInertia(void); 00086 00087 // public methods for element output 00088 int sendSelf(int commitTag, Channel &theChannel); 00089 int recvSelf(int commitTag, Channel &theChannel, FEM_ObjectBroker &theBroker); 00090 int displaySelf(Renderer &theViewer, int displayMode, float fact); 00091 void Print(OPS_Stream &s, int flag =0); 00092 00093 Response *setResponse(const char **argv, int argc, Information &eleInformation, OPS_Stream &s); 00094 int getResponse(int responseID, Information &eleInformation); 00095 00096 int setParameter (const char **argv, int argc, Parameter ¶m); 00097 00098 protected: 00099 00100 private: 00101 double computeCurrentStrain(void) const; 00102 00103 // private attributes - a copy for each object of the class 00104 ID connectedExternalNodes; // contains the tags of the end nodes 00105 int dimension; // truss in 2 or 3d domain 00106 int numDOF; // number of dof for truss 00107 00108 Vector *theLoad; // pointer to the load vector P 00109 Matrix *theMatrix; // pointer to objects matrix (one of class Matrices) 00110 Vector *theVector; // pointer to objects vector (one of class Vectors) 00111 00112 double cosX[3]; // direction cosines 00113 00114 double L; // length of truss based on undeformed configuration 00115 double rho; // mass density per unit length 00116 00117 Node *theNodes[2]; 00118 00119 SectionForceDeformation *theSection; 00120 00121 // static data - single copy for all objects of the class 00122 static Matrix trussM2; // class wide matrix for 2*2 00123 static Matrix trussM3; // class wide matrix for 3*3 00124 static Matrix trussM4; // class wide matrix for 4*4 00125 static Matrix trussM6; // class wide matrix for 6*6 00126 static Matrix trussM12; // class wide matrix for 12*12 00127 static Vector trussV2; // class wide Vector for size 2 00128 static Vector trussV3; // class wide Vector for size 3 00129 static Vector trussV4; // class wide Vector for size 4 00130 static Vector trussV6; // class wide Vector for size 6 00131 static Vector trussV12; // class wide Vector for size 12 00132 }; 00133 00134 #endif
Generated on Mon Oct 23 15:05:10 2006 for OpenSees by |
opensees-support @ berkeley.edu
Supported by the National Science Foundation
©2006, UC Regents