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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: 1.1 $
00022 // $Date: 2001/07/13 21:11:27 $
00023 // $Source: /usr/local/cvs/OpenSees/SRC/element/dispBeamColumn/DispBeamColumn2d.h,v $
00024 
00025 // Written: MHS
00026 // Created: Feb 2001
00027 //
00028 // Description: This file contains the class definition for DispBeamColumn2d.
00029 // The element displacement field gives rise to constant axial strain and
00030 // linear curvature.
00031 
00032 #ifndef DispBeamColumn2d_h
00033 #define DispBeamColumn2d_h
00034 
00035 #ifndef _bool_h
00036 #include "bool.h"
00037 #endif
00038 
00039 #include <Element.h>
00040 #include <Matrix.h>
00041 #include <Vector.h>
00042 #include <ID.h>
00043 
00044 #include <Node.h>
00045 #include <SectionForceDeformation.h>
00046 #include <CrdTransf2d.h>
00047 #include <Response.h>
00048 
00050 class DispBeamColumn2d : public Element
00051 {
00052   public:
00054     DispBeamColumn2d(int tag, int nd1, int nd2,
00055     int numSections, SectionForceDeformation &s,
00056     CrdTransf2d &coordTransf, double rho = 0.0);
00058     DispBeamColumn2d();
00060     virtual ~DispBeamColumn2d();
00061 
00063     int getNumExternalNodes(void) const;
00065     const ID &getExternalNodes(void);
00067     int getNumDOF(void);
00069     void setDomain(Domain *theDomain);
00070 
00072     int commitState(void);
00074     int revertToLastCommit(void);
00076     int revertToStart(void);
00077 
00079     int update(void);
00081     const Matrix &getTangentStiff(void);
00083     const Matrix &getSecantStiff(void);
00085     const Matrix &getDamp(void);
00087     const Matrix &getMass(void);
00088 
00090     void zeroLoad();
00092     int addLoad(const Vector &addLoad);
00094     int addInertiaLoadToUnbalance(const Vector &accel);
00096     const Vector &getResistingForce(void);
00098     const Vector &getResistingForceIncInertia(void);            
00099 
00101     int sendSelf(int commitTag, Channel &theChannel);
00103     int recvSelf(int commitTag, Channel &theChannel, FEM_ObjectBroker 
00104     &theBroker);
00106     int displaySelf(Renderer &theViewer, int displayMode, float fact);
00108     void Print(ostream &s, int flag =0);
00109 
00111  Response *setResponse(char **argv, int argc, Information &eleInfo);
00113     int getResponse(int responseID, Information &eleInfo);
00114 
00115   protected:
00116     
00117   private:
00119  int numSections;
00121     SectionForceDeformation **theSections; 
00122  CrdTransf2d *crdTransf;        
00123 
00124     ID connectedExternalNodes; 
00125  double L;
00126 
00128     Node *nd1Ptr;  
00129     Node *nd2Ptr;
00130 
00132     static Matrix K;  
00133     static Vector P;  
00134  Vector Q;  
00135  Vector q;  
00136     double rho;   
00137 
00138  static double workArea[];
00139 };
00140 
00141 #endif
00142 
00143 ÿ