You can now add structural connections to members

src/ifcopenshell-python/ifcopenshell/api/structural/add_structural_analysis_model.py

@@ -10,9 +10,6 @@ class Usecase:
             self.settings[key] = value
 
     def execute(self):
-        return self.file.create_entity("IfcStructuralAnalysisModel", **{
-            "GlobalId": ifcopenshell.guid.new(),
-            "OwnerHistory": ifcopenshell.api.run("owner.create_owner_history", self.file),
-            "Name": "Unnamed",
-            "PredefinedType": "LOADING_3D"
-        })
+        return ifcopenshell.api.run(
+            "root.create_entity", self.file, ifc_class="IfcStructuralAnalysisModel", predefined_type="LOADING_3D"
+        )

src/ifcopenshell-python/ifcopenshell/api/structural/add_structural_member_connection.py

@@ -0,0 +1,19 @@
+import ifcopenshell
+import ifcopenshell.api
+
+
+class Usecase:
+    def __init__(self, file, **settings):
+        self.file = file
+        self.settings = {"relating_structural_member": None, "related_structural_connection": None}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        for connection in self.settings["related_structural_connection"].ConnectsStructuralMembers or []:
+            if connection.RelatingStructuralMember == self.settings["relating_structural_member"]:
+                return
+        rel = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcRelConnectsStructuralMember")
+        rel.RelatingStructuralMember = self.settings["relating_structural_member"]
+        rel.RelatedStructuralConnection = self.settings["related_structural_connection"]
+        return rel

src/ifcopenshell-python/ifcopenshell/api/structural/data.py

@@ -49,7 +49,7 @@ class Data:
                 has_results.append(result_group.id())
             data["HasResults"] = has_results
 
-            data["SharedPlacement"] = model.SharedPlacement.id()
+            data["SharedPlacement"] = model.SharedPlacement.id() if model.SharedPlacement else None
 
             cls.structural_analysis_models[model.id()] = data