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ElasticBeam2d.h

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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: 1.12 $
00022 // $Date: 2006/09/05 21:10:13 $
00023 // $Source: /usr/local/cvs/OpenSees/SRC/element/elasticBeamColumn/ElasticBeam2d.h,v $
00024                                                                         
00025                                                                         
00026 // Written: fmk 11/95
00027 // Revised:
00028 //
00029 // Purpose: This file contains the class definition for ElasticBeam2d.
00030 // ElasticBeam2d is a plane frame member.
00031 
00032 #ifndef ElasticBeam2d_h
00033 #define ElasticBeam2d_h
00034 
00035 #include <Element.h>
00036 #include <Node.h>
00037 #include <Matrix.h>
00038 #include <Vector.h>
00039 
00040 class Channel;
00041 class Information;
00042 class CrdTransf2d;
00043 class Response;
00044 class Renderer;
00045 
00046 class ElasticBeam2d : public Element
00047 {
00048   public:
00049     ElasticBeam2d();        
00050     ElasticBeam2d(int tag, double A, double E, double I, 
00051                   int Nd1, int Nd2, CrdTransf2d &theTransf, 
00052                   double alpha = 0.0, double d = 0.0, double rho = 0.0);
00053     ~ElasticBeam2d();
00054 
00055     const char *getClassType(void) const {return "ElasticBeam2d";};
00056 
00057     int getNumExternalNodes(void) const;
00058     const ID &getExternalNodes(void);
00059     Node **getNodePtrs(void);
00060 
00061     int getNumDOF(void);
00062     void setDomain(Domain *theDomain);
00063     
00064     int commitState(void);
00065     int revertToLastCommit(void);        
00066     int revertToStart(void);
00067     
00068     int update(void);
00069     const Matrix &getTangentStiff(void);
00070     const Matrix &getInitialStiff(void);
00071     const Matrix &getMass(void);    
00072 
00073     void zeroLoad(void);        
00074     int addLoad(ElementalLoad *theLoad, double loadFactor);
00075     int addInertiaLoadToUnbalance(const Vector &accel);
00076 
00077     const Vector &getResistingForce(void);
00078     const Vector &getResistingForceIncInertia(void);            
00079     
00080     int sendSelf(int commitTag, Channel &theChannel);
00081     int recvSelf(int commitTag, Channel &theChannel, FEM_ObjectBroker &theBroker);
00082     
00083     void Print(OPS_Stream &s, int flag = 0);    
00084     int displaySelf(Renderer &theViewer, int displayMode, float fact);
00085 
00086     Response *setResponse (const char **argv, int argc, Information &info, OPS_Stream &s);
00087     int getResponse (int responseID, Information &info);
00088  
00089     int setParameter (const char **argv, int argc, Parameter &param);
00090     int updateParameter (int parameterID, Information &info);
00091 
00092   private:
00093     double A,E,I;
00094     double alpha, d;
00095     
00096     double rho;
00097     
00098     static Matrix K;
00099     static Vector P;
00100     Vector Q;
00101     
00102     static Matrix kb;
00103     Vector q;
00104     double q0[3];  // Fixed end forces in basic system
00105     double p0[3];  // Reactions in basic system
00106     
00107     Node *theNodes[2];
00108     
00109     ID  connectedExternalNodes;    
00110 
00111     CrdTransf2d *theCoordTransf;
00112 };
00113 
00114 #endif
00115 
00116

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