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SoilFootingSection2d.h

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00001 // Date: 12/08/2004
00002 //
00003 // File name: SoilFootingSection2d.h
00004 // 
00005 // Coded by: Sivapalan Gajan <sgajan@ucdavis.edu>
00006 //
00007 // Description: This file contains the class definition for SoilFootingSection2d.
00008 // SoilFootingSection2d is a footing-soil interface contact material, a subclass 
00009 // of SectionForceDeformation, and should be used with a ZeroLengthSection 
00010 // element.
00011 
00012 
00013 
00014 #ifndef SoilFootingSection2d_h
00015 #define SoilFootingSection2d_h
00016 
00017 #include <SectionForceDeformation.h>
00018 #include <Matrix.h>
00019 #include <Vector.h>
00020 #include <ID.h>
00021 
00022 #include <fstream>
00023 #include <iostream>
00024 
00025 using namespace std;
00026 
00027 class Channel;
00028 class FEM_ObjectBroker;
00029 class Information;
00030 
00031 class SoilFootingSection2d: public SectionForceDeformation
00032 {
00033    public:
00034 
00035       // constructors and destructor
00036       SoilFootingSection2d (int tag, double fs, double vult, double l, double kv, 
00037                             double kh, double rv, double deltaL);
00038       SoilFootingSection2d (void);    
00039       ~SoilFootingSection2d (void);
00040 
00041       // commit methods
00042       virtual int commitState (void);
00043       virtual int revertToLastCommit (void);
00044       virtual int revertToStart (void);
00045   
00046       // methods related to section deofrmation
00047       virtual int setTrialSectionDeformation (const Vector&);
00048       virtual const Vector &getSectionDeformation (void);
00049   
00050       // methods related to section forces/stiffness
00051       const Vector &getStressResultant (void);
00052       const Matrix &getSectionTangent (void);
00053       const Matrix &getSectionFlexibility (void);
00054   
00055       // other get methods
00056       const ID &getType (void);
00057       int getOrder (void) const;
00058       virtual SectionForceDeformation *getCopy (void);
00059   
00060       // methods used by database/parallel programming
00061       int sendSelf (int commitTag, Channel &theChannel);
00062       int recvSelf (int commitTag, Channel &theChannel,
00063                     FEM_ObjectBroker &theBroker);
00064   
00065       virtual void Print (OPS_Stream &s, int flag =0);
00066 
00067       const Matrix& getInitialTangent();
00068   
00069 //      virtual void getSectionStiffness (Matrix &Ks);
00070   
00071    protected:
00072 
00073       // used only by this class
00074       void initializeInternalVariables (void);
00075       void initializeBoundingSurface (void);
00076       void tempFunction (void); 
00077       int applyLoading (Vector);  
00078 
00079 
00080 
00081    private:
00082 
00083 
00084    
00085       // basic model parameters
00086       double FS;
00087       double Vult, qult;
00088       double V;
00089       double L;
00090       double Kv, Kh, Kt;
00091       double M;
00092 
00093       double h, hCurr, hPrev, dhCurr, dVtemp;
00094 
00095       // info about section force, disp, and stiffness
00096       Vector e, eCommit, deModel;
00097       Vector s, sCommit;
00098       Matrix ks, ksE;
00099       double dTheta, dThetaPrev;
00100       double HPrevCommit, MPrevCommit;
00101 
00102 
00103       // other members
00104       double Rv;
00105       double dL;
00106       double ecc, eccCommit;
00107       double Mult, Melastic, Mmaxpast;
00108 
00109       int noNodes;
00110       int incr;
00111       int ini_size;
00112       int c1, c1T, c2, c2T;
00113       int c1Commit, c1TCommit, c2Commit, c2TCommit;
00114 
00115       // internal variables
00116       double **foot;
00117       double **soilMin, **soilMax;
00118       double **pressure, **pressMax;
00119       double thetaPlus, thetaMinus, thetaRange, Mlimit;
00120       double thetaPlusPrev, thetaMinusPrev;
00121  
00122       // bounding surface parameters
00123       double a, b, ccc, d, eee, f;
00124       double A, B;
00125       double Fv, Fh, Fm;
00126       double alpha, beta, pult;
00127       double tolerance;
00128       double soilFree;
00129 
00130       static ID code;
00131       int isOver, isdV;
00132       int isElastic;       
00133       double dTh, dThP;
00134 
00135 };
00136 
00137 #endif

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