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LimitCurve.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: 1.2 $
00022 // $Date: 2006/09/05 22:32:43 $
00023 // $Source: /usr/local/cvs/OpenSees/SRC/material/uniaxial/limitState/limitCurve/LimitCurve.h,v $
00024 
00025 //
00026 // Written: kje
00027 // Created: 08/01
00028 // Revision: A
00029 //
00030 // Description: This file contains the class definition for 
00031 // LimitCurve. LimitCurve is a base class and 
00032 // thus no objects of it's type can be instantiated. It has pure virtual 
00033 // functions which must be implemented in it's derived classes.  Sub classes
00034 // will define the curve used by LimitStateMaterial to determine if a 
00035 // limit state has been reached.
00036 
00037 
00038 #ifndef LimitCurve_h
00039 #define LimitCurve_h
00040 
00041 #include <DomainComponent.h>
00042 #include <MovableObject.h>
00043 
00044 class ID;
00045 class Vector;
00046 class Matrix;
00047 class Information;
00048 
00049 
00050 class LimitCurve : public TaggedObject, public MovableObject
00051 {
00052   public:
00053     LimitCurve (int tag, int classTag);
00054     virtual ~LimitCurve();
00055 
00056     virtual LimitCurve *getCopy (void) = 0;
00057 
00058     virtual int checkElementState(double springForce) = 0;
00059     
00060     virtual double getDegSlope(void) = 0;
00061     virtual double getResForce(void) = 0;
00062     virtual double getUnbalanceForce(void) = 0;
00063     
00064     virtual double findLimit(double input) = 0;
00065 
00066     virtual int revertToStart (void) = 0;        
00067 
00068   protected:
00069     
00070   private:
00071  
00072 
00073 };
00074 
00075 
00076 #endif
00077

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