AnalysisViewModal and StrainTuple was added

StructureHelperCommon/Models/Forces/IForceTuple.cs

@@ -6,13 +6,34 @@ using System.Threading.Tasks;
 
 namespace StructureHelperCommon.Models.Forces
 {
+    /// <summary>
+    /// Interface for generic force for beams
+    /// </summary>
     public interface IForceTuple : ICloneable
     {
+        /// <summary>
+        /// Bending moment round about x-axis
+        /// </summary>
         double Mx { get; set; }
+        /// <summary>
+        /// Bending moment round about y-axis
+        /// </summary>
         double My { get; set; }
+        /// <summary>
+        /// Longitudinal force along x-axis
+        /// </summary>
         double Nz { get; set; }
+        /// <summary>
+        /// Shear force along x-axis
+        /// </summary>
         double Qx { get; set; }
+        /// <summary>
+        /// Shear force along z-axis
+        /// </summary>
         double Qy { get; set; }
+        /// <summary>
+        /// Twisting moment round about z-axis
+        /// </summary>
         double Mz { get; set; }
     }
 }