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beam2d03.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: 2005/10/20 23:52:11 $
00023 // $Source: /usr/local/cvs/OpenSees/SRC/element/beam2d/beam2d03.h,v $
00024                                                                         
00025                                                                         
00026 // File: ~/element/beam2d03.h
00027 //
00028 // Written: fmk 11/95
00029 // Revised:
00030 //
00031 // Purpose: This file contains the class definition for beam2d03.
00032 // beam2d03 is a plane frame member.
00033 
00034 #ifndef beam2d03_h
00035 #define beam2d03_h
00036 
00037 #include <Element.h>
00038 #include <Node.h>
00039 #include <Matrix.h>
00040 #include <Vector.h>
00041 
00042 class Channel;
00043 
00044 class beam2d03 : public Element
00045 {
00046   public:
00047     beam2d03();        
00048     beam2d03(int tag, double A, double E, double I, int Nd1, int Nd2);
00049     ~beam2d03();
00050 
00051     void setDomain(Domain *theDomain);
00052     int getNumExternalNodes(void) const;
00053     const ID &getExternalNodes(void);
00054     Node **getNodePtrs(void);
00055 
00056     int getNumDOF(void);
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     double A,E,I;
00077     double L,sn,cs;
00078     ID  connectedExternalNodes;    
00079     Node *theNodes[2];
00080 
00081     Matrix k; // the stiffness matrix
00082         
00083     Vector rForce;
00084     Vector load;
00085     Matrix trans;  // hold part of transformation matrix
00086 };
00087 
00088 #endif
00089 
00090

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