CorotTrussSection.h

// -*-c++-*-
//----------------------------------------------------------------------------
//  XC program; finite element analysis code
//  for structural analysis and design.
//
//  Copyright (C)  Luis C. Pérez Tato
//
//  This program derives from OpenSees <http://opensees.berkeley.edu>
//  developed by the  «Pacific earthquake engineering research center».
//
//  Except for the restrictions that may arise from the copyright
//  of the original program (see copyright_opensees.txt)
//  XC is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or 
//  (at your option) any later version.
//
//  This software is distributed in the hope that it will be useful, but 
//  WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details. 
//
//
// You should have received a copy of the GNU General Public License 
// along with this program.
// If not, see <http://www.gnu.org/licenses/>.
//----------------------------------------------------------------------------
/* ****************************************************************** **
**    OpenSees - Open System for Earthquake Engineering Simulation    **
**          Pacific Earthquake Engineering Research Center            **
**                                                                    **
**                                                                    **
** (C) Copyright 1999, The Regents of the University of California    **
** All Rights Reserved.                                               **
**                                                                    **
** Commercial use of this program without express permission of the   **
** University of California, Berkeley, is strictly prohibited.  See   **
** file 'COPYRIGHT'  in main directory for information on usage and   **
** redistribution,  and for a DISCLAIMER OF ALL WARRANTIES.           **
**                                                                    **
** Developed by:                                                      **
**   Frank McKenna (fmckenna@ce.berkeley.edu)                         **
**   Gregory L. Fenves (fenves@ce.berkeley.edu)                       **
**   Filip C. Filippou (filippou@ce.berkeley.edu)                     **
**                                                                    **
** ****************************************************************** */
                                                                        
// $Revision: 1.6 $
// $Date: 2003/03/12 19:20:46 $
// $Source: /usr/local/cvs/OpenSees/SRC/element/truss/CorotTrussSection.h,v $

#ifndef CorotTrussSection_h
#define CorotTrussSection_h

// Written: MHS 
// Created: May 2001

#include "CorotTrussBase.h"
#include <utility/matrix/Matrix.h>
#include <utility/matrix/Vector.h>
#include "domain/mesh/element/utils/physical_properties/SectionFDPhysicalProperties.h"

namespace XC {

//
class CorotTrussSection: public CorotTrussBase
  {
  private:
    SectionFDPhysicalProperties physicalProperties; 
    double persistentInitialDeformation; 
    
    double computeCurrentStrain(void) const;    
  public:
    CorotTrussSection(int tag, int dim,int Nd1, int Nd2, SectionForceDeformation &theMaterial);
    CorotTrussSection(int tag,int dimension,const Material *ptr_mat);
    CorotTrussSection(void);
    Element *getCopy(void) const;
    inline virtual ~CorotTrussSection(void) {}

    void setDomain(Domain *theDomain);

    // Element birth and death stuff.
    const double &getPersistentInitialSectionDeformation(void) const;
    void incrementPersistentInitialDeformationWithCurrentDeformation(void);

    // public methods to set the state of the element    
    int commitState(void);
    int revertToLastCommit(void);        
    int revertToStart(void);        
    int update(void);
    
    const Material *getMaterial(void) const;
    Material *getMaterial(void);
    virtual double getRho(void) const;
    double getLinearRho(void) const;

    // public methods to obtain stiffness, mass, damping and residual information    
    const Matrix &getTangentStiff(void) const;
    const Matrix &getInitialStiff(void) const;
    const Matrix &getMass(void) const;

    void alive(void);
    void zeroLoad(void);
    int addLoad(ElementalLoad *, double loadFactor);
    int addInertiaLoadToUnbalance(const Vector &accel);

    double getAxialForce(void) const;
    const Vector &getResistingForce(void) const;
    const Vector &getResistingForceIncInertia(void) const;            
    double getInitialStrain(void) const;

    // public methods for element output
    int sendSelf(Communicator &);
    int recvSelf(const Communicator &);
    void Print(std::ostream &s, int flag =0) const;    

    Response *setResponse(const std::vector<std::string> &argv, Information &eleInfo);
    int getResponse(int responseID, Information &eleInformation);
  };
} // end of XC namespace

#endif