Grasshopper calls SAP2000 API tutorial document (1)

Official Account: Non-Deconstructive · Author: Zhou Wenqi (Venchy)

1. Grasshopper calls SAP2000 API tutorial

1.1. SAP2000 API

1.1.1. SAP2000 API Overview

1.1.1.1. API basic associated files:

python/C#：C:\Program Files\Computers and Structures\SAP2000 22\SAP2000v1.dll VBA：C:\Program Files\Computers and Structures\SAP2000 22\SAP2000v1.tlb API documentation: C:\Program Files\Computers and Structures\SAP2000 22\CSI_OAPI_Documentation.chm Note: The SAP2000v1.dll and SAP2000v1.tlb files here need to be configured separately according to different SAP2000 versions.

1.1.1.2. Development environment configuration----Python

Install comtypes library pip install comtypes Two ways for Python to call SAP2000: (1) Get the currently running SAP2000 object import os import sys import comtypes.client SapObject = comtypes.client.GetActiveObject(“CSI.SAP2000.API.SapObject”) SapModel = SapObject.SapModel (2) Create a new SAP2000 object import os import sys import comtypes.client import comtypes

helper = comtypes.client.CreateObject(‘CSiAPIv1.Helper’) mySapObject = helper.CreateObject(r”C:\Program Files\Computers and Structures\SAP2000 22\SAP2000.exe”)

mySapObject = helper.CreateObjectProgID(“CSI.SAP2000.API.SapObject”)

mySapObject.ApplicationStart() SapModel = mySapObject.SapModel Note: To obtain progid, enter regedit into the registry and search under HKEY_LOCAL_MACHINE\SOFTWARE\Classes

1.1.1.3. Development environment configuration----C#

(1) Get the currently running SAP2000 object using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using SAP2000v1; namespaceSAP2000 { classProgram     { staticvoidMain(string[] args)         {             cOAPI mySapObject = null;             mySapObject = (cOAPI)System.Runtime.InteropServices.Marshal.GetActiveObject(“CSI.SAP2000.API.SapObject”);             cSapModel sapModel = mySapObject.SapModel;         }     } } (2) Create a new SAP2000 object using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using SAP2000v1; namespaceSAP2000 { classProgram     { staticvoidMain(string[] args)         {             cHelper myHelper;             myHelper = new Helper();             cOAPI mySapObject = null;             mySapObject = myHelper.CreateObject(@“C:\Program Files\Computers and Structures\SAP2000 22\SAP2000.exe”); //or //mySapObject = myHelper.CreateObjectProgID(“CSI.SAP2000.API.SapObject”);             mySapObject.ApplicationStart();             cSapModel mySapModel;             mySapModel = mySapObject.SapModel;             mySapModel.InitializeNewModel((eUnits.kip_in_F));         }     } }

1.1.2. SAP2000 API simple case

Use python to call SAP2000 to analyze a beam with a span of 6m import os import sys import comtypes.client

defCaculation(SapModel,depth,force_z):

New SAP2000 model

    SapModel.InitializeNewModel()     ret = SapModel.File.NewBlank()

define material

    SapModel.PropMaterial.AddMaterial(“C40”,2,“China”,“GB”,“GB50010 C40”)

define section

    SapModel.PropFrame.SetRectangle(“Frame”,“C40”,depth,400)

Build model

    SapModel.FrameObj.AddByCoord(0,0,0,3000,0,0,“element1”,“Frame”,“element1”)     SapModel.FrameObj.AddByCoord(3000,0,0,6000,0,0,“element2”,“Frame”,“element2”)

Add constraints

    s_Point1=""     e_Point1=""     [s_Point1,e_Point1,ret]=SapModel.FrameObj.GetPoints(“element1”,s_Point1,e_Point1)

    s_Point2=""     e_Point2=""     [s_Point2,e_Point2,ret]=SapModel.FrameObj.GetPoints(“element2”,s_Point2,e_Point2)

    R=[True,True,True,True,True,True]     SapModel.PointObj.setRestraint(s_Point1,R)     SapModel.PointObj.setRestraint(e_Point2,R)

Add load

    SapModel.LoadPatterns.Add(“Live”,3)     Load=[0,0,force_z,0,0,0]     SapModel.PointObj.SetLoadForce(e_Point1, “Live”, Load)

Save model

    path=r’D:\2021\study\07-grasshopperTutorial\example_01\test01.sdb’     SapModel.File.Save(path)

    SapModel.Analyze.RunAnalysis()

Extract results

    SapModel.Results.Setup.DeselectAllCasesAndCombosForOutput()     ret = SapModel.Results.Setup.SetCaseSelectedForOutput(“Live”)     NumberResults=0     Obj, Elm, LoadCase, StepType, StepNum, F1, F2, F3, M1, M2, M3=[],[],[],[],[],[],[],[],[],[],[]     [NumberResults, Obj, Elm, LoadCase, StepType, StepNum, F1, F2, F3, M1, M2, M3,ret] = SapModel.Results.JointReact(s_Point1, 0, NumberResults, Obj, Elm, LoadCase, StepType, StepNum, F1, F2, F3, M1, M2, M3)     print(F1)     print(F2)     print(F3)

Get SAP2000 object

mySapObject = comtypes.client.GetActiveObject(“CSI.SAP2000.API.SapObject”) SapModel = mySapObject.SapModel depths=[500,600,700,800] force_zs=[1000,2000,3000,4000] for i,depth in enumerate(depths):     force_z=force_zs[i]     Caculation(SapModel,depth,force_z)

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Original Source: https://mp.weixin.qq.com/s/3guGjat6eM2VqU3vundoMw