ConcreteBucklingCalculator was added

StructureHelperLogics/NdmCalculations/Buckling/ConcreteBucklingResult.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Buckling
+{
+    /// <inheritdoc/>
+    public class ConcreteBucklingResult : IConcreteBucklingResult
+    {
+        /// <inheritdoc/>
+        public bool IsValid { get; set; }
+        /// <inheritdoc/>
+        public string Desctription { get; set; }
+        /// <inheritdoc/>
+        public double EtaFactorAlongX { get; set; }
+        /// <inheritdoc/>
+        public double EtaFactorAlongY { get; set; }
+    }
+}