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beam3d02.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: 1.6 $
00022 // $Date: 2003/02/25 23:32:46 $
00023 // $Source: /usr/local/cvs/OpenSees/SRC/element/beam3d/beam3d02.h,v $
00024                                                                         
00025                                                                         
00026 // Written: fmk 11/95
00027 // Revised:
00028 //
00029 // Purpose: This file contains the class definition for beam3d02.
00030 // beam3d02 is a plane frame member.
00031 
00032 #ifndef beam3d02_h
00033 #define beam3d02_h
00034 
00035 #include <Element.h>
00036 #include <Node.h>
00037 #include <Matrix.h>
00038 #include <Vector.h>
00039 
00040 class Channel;
00041 
00042 class beam3d02 : public Element
00043 {
00044   public:
00045     beam3d02();        
00046     beam3d02(int tag, double A, double E, double G, 
00047               double Jx, double Iy, double Iz, int Nd1, int Nd2, double theta);
00048     ~beam3d02();
00049 
00050     int getNumExternalNodes(void) const;
00051     const ID &getExternalNodes(void);
00052     Node **getNodePtrs(void);
00053 
00054     int getNumDOF(void);
00055     void setDomain(Domain *theDomain);
00056 
00057     int revertToLastCommit(void);        
00058     
00059     const Matrix &getTangentStiff(void);
00060     const Matrix &getInitialStiff(void);
00061 
00062     void zeroLoad(void);        
00063     int addLoad(ElementalLoad *theLoad, double loadFactor);
00064     int addInertiaLoadToUnbalance(const Vector &accel);
00065 
00066     const Vector &getResistingForce(void);
00067     const Vector &getResistingForceIncInertia(void);            
00068     
00069     int sendSelf(int commitTag, Channel &theChannel);
00070     int recvSelf(int commitTag, Channel &theChannel, FEM_ObjectBroker &theBroker);
00071     
00072     void Print(OPS_Stream &s, int flag =0);    
00073     
00074   private:
00075     const Matrix &getStiff(void);    
00076     void formVar(void);
00077     
00078     double A,E,G,Jx,Iy,Iz,theta;
00079     double L;
00080     double dx,dy,dz,EA,twoE,fourE,twelveE,sixE;
00081     
00082     static Matrix k; // the stiffness matrix
00083     static Matrix m; // the mass matrix 
00084     static Matrix d; // the damping matrix
00085         
00086     Vector rForce;
00087     Vector load;
00088     
00089     ID  connectedExternalNodes;    
00090     int isStiffFormed;
00091     Node *theNodes[2];
00092 };
00093 
00094 #endif
00095 
00096

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