StructureHelper/StructureHelperLogics/NdmCalculations/Cracking/SofteningLogics/RebarStressSofteningLogic.cs

using LoaderCalculator.Data.Ndms;
using LoaderCalculator.Logics;
using StructureHelperCommon.Infrastructures.Enums;
using StructureHelperCommon.Infrastructures.Exceptions;
using StructureHelperCommon.Models;
using StructureHelperCommon.Models.Calculators;
using StructureHelperCommon.Models.Forces;
using StructureHelperCommon.Models.Loggers;
using StructureHelperCommon.Services.Forces;
using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
using StructureHelperLogics.NdmCalculations.Primitives;
using StructureHelperLogics.NdmCalculations.Triangulations;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace StructureHelperLogics.NdmCalculations.Cracking
{
    public class RebarStressSofteningLogic : ICrackSofteningLogic
    {
        /// <summary>
        /// Rebar result immediately after cracking appearance
        /// </summary>
        private RebarStressResult crackRebarResult;
        /// <summary>
        /// Rebar resul for actual force combination
        /// </summary>
        private RebarStressResult actualRebarResult;
        private TriangulationOptions options;
        private INdm? concreteNdm;
        private INdm? rebarNdm;

        private double rebarActualStrain;
        private double concreteStrainActual;
        private double rebarActualStress;
        private double softeningFactor;
        private double minValueOfFactor = 0.2d;
        private IRebarNdmPrimitive rebarPrimitive;
        private IRebarCrackInputData inputData;

        public double MinValueOfFactor
        {
            get => minValueOfFactor; set
            {
                minValueOfFactor = value;
                IsResultActual = false;
            }
        }
        public IRebarNdmPrimitive RebarPrimitive
        {
            get => rebarPrimitive; set
            {
                rebarPrimitive = value;
                IsResultActual = false;
            }
        }
        public IRebarCrackInputData InputData
        {
            get => inputData; set
            {
                inputData = value;
                IsResultActual = false;
            }
        }
        public IShiftTraceLogger? TraceLogger { get; set; }
        public bool IsResultActual { get; private set; } = false;

        public double GetSofteningFactor()
        {
            TraceLogger?.AddMessage(LoggerStrings.LogicType(this), TraceLogStatuses.Debug);
            if (IsResultActual == false)
            {
                GetRebarAndConcreteNdms();
                softeningFactor = GetPsiSFactor(InputData.ForceTuple, InputData.CrackableNdmCollection);
                IsResultActual = true;
            }
            return softeningFactor;
            
        }

        private void GetRebarAndConcreteNdms()
        {
            options = new TriangulationOptions()
            {
                CalcTerm = CalcTerms.ShortTerm,
                LimiteState = LimitStates.SLS,
            };
            concreteNdm = RebarPrimitive.GetConcreteNdm(options);
            concreteNdm.StressScale = 1d;
            rebarNdm = RebarPrimitive.GetRebarNdm(options);
        }

        private double GetPsiSFactor(ForceTuple forceTuple, IEnumerable<INdm> crackableNdms)
        {

            var crackResult = calculateCrackTuples(forceTuple, crackableNdms);
            if (crackResult.IsValid == false)
            {
                string errorString = LoggerStrings.CalculationError + crackResult.Description;
                TraceLogger?.AddMessage($"Rebar name: {RebarPrimitive.Name}\n" + errorString, TraceLogStatuses.Error);
                throw new StructureHelperException(errorString);
            }

            actualRebarResult = GetRebarStressResultByForceTuple(forceTuple);
            rebarActualStrain = actualRebarResult.RebarStrain;
            rebarActualStress = actualRebarResult.RebarStress;
            TraceLogger?.AddMessage($"Actual strain of rebar EpsilonS = {rebarActualStrain}(dimensionless)");
            concreteStrainActual = concreteNdm
                .PrestrainLogic
                .GetAll()
                .Sum(x => x.PrestrainValue);
            TraceLogger?.AddMessage($"Actual strain of concrete on the axis of rebar EpsilonC = {concreteStrainActual}(dimensionless)");
            if (crackResult.IsSectionCracked == false)
            {
                TraceLogger?.AddMessage($"Section is not cracked PsiS = {MinValueOfFactor}");
                return MinValueOfFactor;
            }
            if (crackResult.FactorOfCrackAppearance == 0d)
            {
                TraceLogger?.AddMessage($"Section is cracked in start force combination, PsiS = 1.0");
                return 1d;
            }
            crackRebarResult = GetRebarStressResultByForceTuple(crackResult.TupleOfCrackAppearance as ForceTuple);

            var stressInCracking = crackRebarResult.RebarStress;
            TraceLogger?.AddMessage($"Stress in rebar immediately after cracking Sigma,scrc = {stressInCracking}(Pa)");
            TraceLogger?.AddMessage($"Actual stress in rebar Sigma,s = {rebarActualStress}(Pa)");
            double psiS = GetExponentialSofteningFactor(stressInCracking);
            TraceLogger?.AddMessage($"PsiS = {psiS}");
            return psiS;
        }

        private double GetExponentialSofteningFactor(double stressInCracking)
        {
            var stressRatio = stressInCracking / rebarActualStress;
            var logic = new ExpSofteningLogic()
            {
                ForceRatio = stressRatio,
                PsiSMin = MinValueOfFactor,
                PowerFactor = 1d,
                BettaFactor = 0.8d,
                TraceLogger = TraceLogger?.GetSimilarTraceLogger(50)
            };
            double psiS = logic.GetSofteningFactor();
            return psiS;
        }

        private CrackForceResult calculateCrackTuples(ForceTuple forceTuple, IEnumerable<INdm> ndms)
        {
            var calculator = new CrackForceBynarySearchCalculator()
            {
                Accuracy = new Accuracy()
                {
                    IterationAccuracy = 0.01d,
                    MaxIterationCount = 1000
                },
                //TraceLogger = TraceLogger?.GetSimilarTraceLogger(150)
            };
            calculator.InputData.StartTuple = new ForceTuple();
            calculator.InputData.EndTuple = forceTuple;
            calculator.InputData.CheckedNdmCollection = new List<INdm>() { concreteNdm };
            calculator.InputData.SectionNdmCollection = ndms;
            calculator.Run();
            return calculator.Result as CrackForceResult;
        }

        private RebarStressResult GetRebarStressResultByForceTuple(ForceTuple forceTuple)
        {
            var calculator = new RebarStressCalculator();
            calculator.InputData.ForceTuple = forceTuple;
            calculator.InputData.NdmCollection = InputData.CrackedNdmCollection;
            calculator.InputData.RebarPrimitive = RebarPrimitive;
            calculator.Run();
            var result = calculator.Result as RebarStressResult;
            if (result.IsValid == false)
            {
                string errorString = LoggerStrings.CalculationError + result.Description;
                TraceLogger?.AddMessage($"Rebar name: {RebarPrimitive.Name}\n" + errorString, TraceLogStatuses.Error);
                throw new StructureHelperException(errorString);
            }
            return result;
        }
    }
}