ThreePointCurve.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: 1.1 $ 00022 // $Date: 2006/02/07 23:15:55 $ 00023 // $Source: /usr/local/cvs/OpenSees/SRC/material/uniaxial/limitState/limitCurve/ThreePointCurve.h,v $ 00024 00025 00026 // Written: kje 00027 // Created: 08/01 00028 // Modified: 07/02 00029 // Revision: A 00030 // 00031 // Description: This file contains the class definition for 00032 // ThreePointCurve. Defines the curve used by HystereticMaterial 00033 // to determine if a limit state has been reached. 00034 00035 00036 #ifndef ThreePointCurve_h 00037 #define ThreePointCurve_h 00038 00039 #define TAG_ThreePointCurve 1972 //???????? 00040 00041 #include <LimitCurve.h> 00042 00043 class Element; 00044 class Domain; 00045 00046 class ThreePointCurve : public LimitCurve 00047 { 00048 public: 00049 ThreePointCurve(int tag, int eleTag, Domain *theDomain, 00050 double x1, double y1, 00051 double x2, double y2, 00052 double x3, double y3, 00053 double Kdeg, double Fres, 00054 int defType, int forType, 00055 int ndI = 0, int ndJ = 0, int dof = 0, int perpDirn = 0); 00056 ThreePointCurve(); 00057 ~ThreePointCurve(); 00058 00059 LimitCurve *getCopy (void); 00060 00061 int checkElementState(double springForce); 00062 00063 double getDegSlope(void); 00064 double getResForce(void); 00065 double getUnbalanceForce(void); 00066 00067 int sendSelf(int commitTag, Channel &theChannel); 00068 int recvSelf(int commitTag, Channel &theChannel, 00069 FEM_ObjectBroker &theBroker); 00070 00071 void Print(OPS_Stream &s, int flag =0); 00072 00073 double findLimit(double input); 00074 00075 int revertToStart(void); 00076 00077 protected: 00078 00079 private: 00080 // Associated beam-colum element information 00081 int eleTag; // tag for associated beam column element 00082 Element *theElement;// element pointer 00083 Domain *theDomain; // needed to retrieve element pointer 00084 00085 int stateFlag; // state of hysteretic material 00086 // stateFlag = 0: prior to failure 00087 // stateFlag = 1: first time limit surface is reached 00088 // stateFlag = 2: on limit surface after first failure 00089 // stateFlag = 3: off limit surface after first failure 00090 00091 double Kdeg; // degrading slope for hysteretic material after failure 00092 double Fres; // residual capacity for hysteretic material after failure (assumed to be positive) 00093 int defType, forType; // flags indicating the axes of the limit state surface 00094 // defType = 1 for max chord rotation 00095 // = 2 for drift based on displ of nodes ndI and ndJ 00096 // forType = 0 for force in associated hysteretic material 00097 // = 1 for shear from beam-column element 00098 // = 2 for axial load from beam-column element 00099 double x1; // corner points of limit surface 00100 double x2; 00101 double x3; 00102 double y1; 00103 double y2; 00104 double y3; 00105 00106 int ndI; // nodes for determining interstory drift 00107 int ndJ; 00108 int dof; // degree of freedom in which drift is desired 00109 int perpDirn; // perpendicular direction to dof to get distance between nodes 00110 double oneOverL;// 1/dist between nodes 00111 00112 int count; //for debugging 00113 00114 }; 00115 00116 00117 #endif
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