CorotCrdTransf2d.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: 1.8 $                                                              
// $Date: 2006/01/13 01:07:48 $                                                                  
// $Source: /usr/local/cvs/OpenSees/SRC/CorotCrdTransf2d.h,v $ 
                                        
// Written: Remo Magalhaes de Souza (rmsouza@ce.berkeley.edu)
// Created: 04/2000
// Revision: A
//
// Description: This file contains the class definition for
// CorotCrdTransf2d.h. CorotCrdTransf2d provides the
// abstraction of a corotation transformation for a planar frame element

// What: "@(#) CorotCrdTransf2d.h, revA"

#ifndef CorotCrdTransf2d_h
#define CorotCrdTransf2d_h

#include "CrdTransf2d.h"
#include "utility/matrix/Matrix.h"

namespace XC {
class CorotCrdTransf2d: public CrdTransf2d
  {
  private:
    double cosAlpha, sinAlpha; // direction cossines of deformed element wrt to local system
    double Ln;                 // deformed element length
    double Lx, Ly;             // components of the deformed member
    mutable double Lxdot, Lydot; 
    mutable double Lxdotdot, Lydotdot; 
    
    Vector ub;                 // basic displacements
    Vector ubcommit;           // committed basic displacements
    Vector ubpr;               // previous basic displacements
    
    bool nodeOffsets;

    static Matrix Tlg;         // matrix that transforms from global to local coordinates
    static Matrix Tbl;         // matrix that transforms from local  to basic coordinates
    static Matrix kg;     
    static Vector uxg;     
    static Vector pg;     
    static Vector dub;     
    static Vector Dub;     

    int compElemtLengthAndOrient(void);
    int compElemtLengthAndOrientWRTLocalSystem(const Vector &ul);
    void transfLocalDisplsToBasic(const Vector &ul);
    void getTransfMatrixLocalGlobal(Matrix &Tlg) const;
    void getTransfMatrixBasicLocal(Matrix &Tbl) const;
    const Matrix &getGeomStiffMatrix(const Vector &pb) const;
  protected:
    int sendData(Communicator &);
    int recvData(const Communicator &);
  public:
    CorotCrdTransf2d(int tag= 0);
    CorotCrdTransf2d(int tag, const Vector &rigJntOffsetI, const Vector &rigJntOffsetJ);
    
    int initialize(Node *nodeIPointer, Node *nodeJPointer);
    int update(void);
    double getInitialLength(void) const;
    double getDeformedLength(void) const;
    
    int commitState(void);
    int revertToLastCommit(void);        
    int revertToStart(void);
    
    const Vector &getBasicTrialDisp(void) const;
    const Vector &getBasicIncrDisp(void) const;
    const Vector &getBasicIncrDeltaDisp(void) const;
    const Vector &getBasicTrialVel(void) const;
    const Vector &getBasicTrialAccel(void) const;
    
    const Vector &getGlobalResistingForce(const Vector &basicForce, const Vector &uniformLoad) const;
    const Matrix &getGlobalStiffMatrix(const Matrix &basicStiff, const Vector &basicForce) const;
    const Matrix &getInitialGlobalStiffMatrix(const Matrix &basicStiff) const;
    
// AddingSensitivity:BEGIN //////////////////////////////////
    const Vector &getBasicDisplSensitivity(int gradNumber);
    const Vector &getGlobalResistingForceShapeSensitivity(const Vector &q,const Vector &p0,int gradNumber);
    const Vector &getBasicTrialDispShapeSensitivity(void);
    bool isShapeSensitivity(void);
    double getdLdh(void);
    double getd1overLdh(void);
// AddingSensitivity:END //////////////////////////////////

    CrdTransf2d *getCopy(void) const;
    
    int sendSelf(Communicator &);
    int recvSelf(const Communicator &);
    
    void Print(std::ostream &s, int flag = 0) const;
    
    // functions used in post-processing only    
    const Vector &getPointGlobalCoordFromLocal(const Vector &) const;
    const Vector &getPointGlobalDisplFromBasic(double xi, const Vector &basicDisps) const;
    const Vector &getI(void);
    const Vector &getJ(void);
    int getLocalAxes(Vector &xAxis, Vector &yAxis) const; 

  };
} // end of XC namespace
#endif