DrainMaterial.hGo to the documentation of this file.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: 1.3 $ 00022 // $Date: 2003/02/14 23:01:38 $ 00023 // $Source: /usr/local/cvs/OpenSees/SRC/material/uniaxial/DrainMaterial.h,v $ 00024 00025 // Written: MHS 00026 // Created: June 2001 00027 // 00028 // Description: This file contains the class definition for 00029 // DrainMaterial. DrainMaterial wraps a Drain spring element subroutine 00030 // and converts it to the UniaxialMaterial interface for use in 00031 // zero length elements, beam sections, or anywhere else 00032 // UniaxialMaterials may be used. 00033 // 00034 // For more information see the Drain-2DX user guide: 00035 // Allahabadi, R.; Powell, G. H. 00036 // UCB/EERC-88/06, Berkeley: Earthquake Engineering Research Center, 00037 // University of California, Mar. 1988, 1 vol. 00038 00039 #ifndef DrainMaterial_h 00040 #define DrainMaterial_h 00041 00042 #include <UniaxialMaterial.h> 00043 00044 class DrainMaterial : public UniaxialMaterial 00045 { 00046 public: 00047 DrainMaterial(int tag, int classTag, int numHV, int numData, double beto = 0.0); 00048 virtual ~DrainMaterial(); 00049 00050 virtual int setTrialStrain(double strain, double strainRate = 0.0); 00051 virtual int setTrial(double strain, double &stress, double &tangent, double strainRate = 0.0); 00052 virtual double getStrain(void); 00053 virtual double getStrainRate(void); 00054 virtual double getStress(void); 00055 virtual double getTangent(void); 00056 virtual double getDampTangent(void); 00057 virtual double getInitialTangent(void); 00058 00059 virtual int commitState(void); 00060 virtual int revertToLastCommit(void); 00061 virtual int revertToStart(void); 00062 00063 // WARNING -- if you wish to override any method in this base class, you must 00064 // also override the getCopy method to return a pointer to the derived class!!! 00065 virtual UniaxialMaterial *getCopy(void); 00066 00067 virtual int sendSelf(int commitTag, Channel &theChannel); 00068 virtual int recvSelf(int commitTag, Channel &theChannel, 00069 FEM_ObjectBroker &theBroker); 00070 00071 virtual void Print(OPS_Stream &s, int flag = 0); 00072 00073 protected: 00074 // Invokes the Drain subroutine 00075 virtual int invokeSubroutine(void); 00076 00077 double *data; // Material parameters array 00078 double *hstv; // History array: first half is committed, second half is trial 00079 00080 int numData; // Number of material parameters 00081 int numHstv; // Number of history variables 00082 00083 double epsilonP; // Committed strain 00084 double sigmaP; // Committed stress 00085 double tangentP; // Committed tangent 00086 00087 double beto; // Stiffness proportional damping factor 00088 double initialTangent; // initial tangent 00089 00090 private: 00091 double epsilon; // Trial strain 00092 double epsilonDot; // Trial strain rate 00093 double sigma; // Trial stress 00094 double tangent; // Trial tangent 00095 }; 00096 00097 00098 #endif 00099
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