KooModulatingFunction.cppGo 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 2001, 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 ** Reliability module developed by: ** 00020 ** Terje Haukaas (haukaas@ce.berkeley.edu) ** 00021 ** Armen Der Kiureghian (adk@ce.berkeley.edu) ** 00022 ** ** 00023 ** ****************************************************************** */ 00024 00025 // $Revision: 1.1 $ 00026 // $Date: 2003/10/27 23:04:40 $ 00027 // $Source: /usr/local/cvs/OpenSees/SRC/reliability/domain/modulatingFunction/KooModulatingFunction.cpp,v $ 00028 00029 00030 // 00031 // Written by Terje Haukaas (haukaas@ce.berkeley.edu) 00032 // 00033 00034 #include <KooModulatingFunction.h> 00035 #include <ModulatingFunction.h> 00036 #include <classTags.h> 00037 00038 00039 KooModulatingFunction::KooModulatingFunction(int tag, 00040 Filter *theFilt, 00041 double pt1, 00042 double pt2) 00043 :ModulatingFunction(tag,MODULATING_FUNCTION_trapezoidal) 00044 { 00045 t1 = pt1; 00046 t2 = pt2; 00047 00048 if (t1>t2 ) { 00049 opserr << "WARNING: Inconsistent input to Koo Modulating Function" << endln; 00050 } 00051 00052 theFilter = theFilt; 00053 } 00054 00055 KooModulatingFunction::~KooModulatingFunction() 00056 { 00057 } 00058 00059 double 00060 KooModulatingFunction::getAmplitude(double time) 00061 { 00062 double amplitude; 00063 if (time < 0.0) { 00064 amplitude = 0.0; 00065 } 00066 else if (time < t1) { 00067 amplitude = time*time/25.0; 00068 } 00069 else if (time < t2) { 00070 amplitude = 1.0; 00071 } 00072 else { 00073 amplitude = exp(-0.5*(time-10.0)); 00074 } 00075 00076 return amplitude; 00077 } 00078 00079 Filter * 00080 KooModulatingFunction::getFilter() 00081 { 00082 return theFilter; 00083 } 00084 00085 double 00086 KooModulatingFunction::getMaxAmplitude() 00087 { 00088 return 1.0; 00089 } 00090 00091 void 00092 KooModulatingFunction::Print(OPS_Stream &s, int flag) 00093 { 00094 } 00095 |