Etabs oapi import os import sys import comtypes.client #set the following flag to True to attach to an existing instance of the program #otherwise a new instance of the program will be started AttachToInstance = False #set the following flag to True to manually specify the path to ETABS.exe #this allows for a connection to a version of ETABS other than the latest installation #otherwise the latest installed version of ETABS will be launched SpecifyPath = False #if the above flag is set to True, specify the path to ETABS below ProgramPath = "C:\Program Files\Computers and Structures\ETABS 2016\ETABS.exe" #full path to the model #set it to the desired path of your model APIPath = 'C:\CSi_ETABS_API_Example' if not os.path.exists(APIPath): try: os.makedirs(APIPath) except OSError: pass ModelPath = APIPath + os.sep + 'API_1-001.edb' if AttachToInstance: #attach to a running instance of ETABS try: #get the active ETABS object myETABSObject = comtypes.client.GetActiveObject( "CSI.ETABS.API.ETABSObject")
except (OSError, comtypes.COMError): print("No running instance of the program found or failed to attach.") sys.exit(-1)
else: #create API helper object helper = comtypes.client.CreateObject('ETABS2 016.Helper') helper = helper.QueryInterface(comtypes.gen.E TABS2016.cHelper) if SpecifyPath: try: #'create an instance of the ETABS object from the specified path myETABSObject = helper.CreateObject(ProgramPath) except (OSError, comtypes.COMError): print("Cannot start a new instance of the program from " + ProgramPath) sys.exit(-1) Page 1
Etabs oapi
else: try: #create an instance of the ETABS object from the latest installed ETABS myETABSObject = helper.CreateObjectProgID("CSI.ET ABS.API.ETABSObject") except (OSError, comtypes.COMError): print("Cannot start a new instance of the program.") sys.exit(-1) #start ETABS application myETABSObject.ApplicationStart()
#create SapModel object SapModel = myETABSObject.SapModel #initialize model SapModel.InitializeNewModel() #create new blank model ret = SapModel.File.NewBlank() #define material property MATERIAL_CONCRETE = 2 ret = SapModel.PropMaterial.SetMaterial('CONC', MATERIAL_CONCRETE) #assign isotropic mechanical properties to material ret = SapModel.PropMaterial.SetMPIsotropic('CONC', 3600, 0.2, 0.0000055) #define rectangular frame section property ret = SapModel.PropFrame.SetRectangle('R1', 'CONC', 12, 12) #define frame section property modifiers ModValue = [1000, 0, 0, 1, 1, 1, 1, 1] ret = SapModel.PropFrame.SetModifiers('R1', ModValue) ###switch to k-ft units ##kip_ft_F = 4 ##ret = SapModel.SetPresentUnits(kip_ft_F) #add frame object by coordinates FrameName1 = ' ' FrameName2 = ' ' FrameName3 = ' ' [FrameName1, ret] = SapModel.FrameObj.AddByCoord(0, 0, 0, 0, 0, 10, FrameName1, 'R1', '1', 'Global') [FrameName2, ret] = SapModel.FrameObj.AddByCoord(0, 0, 10, 8, 0, 16, FrameName2, 'R1', '2', 'Global') [FrameName3, ret] = SapModel.FrameObj.AddByCoord(-4, 0, 10, 0, 0, 10, FrameName3, Page 2
Etabs oapi 'R1', '3', 'Global') #assign point object restraint at base PointName1 = ' ' PointName2 = ' ' Restraint = [True, True, True, True, False, False] [PointName1, PointName2, ret] = SapModel.FrameObj.GetPoints(FrameName1, PointName1, PointName2) ret = SapModel.PointObj.SetRestraint(PointName1, Restraint) #assign point object restraint at top Restraint = [True, True, False, False, False, False] [PointName1, PointName2, ret] = SapModel.FrameObj.GetPoints(FrameName2, PointName1, PointName2) ret = SapModel.PointObj.SetRestraint(PointName2, Restraint) #refresh view, update (initialize) zoom ret = SapModel.View.RefreshView(0, False) #add load patterns LTYPE_OTHER = 8 ret = SapModel.LoadPatterns.Add('1', ret = SapModel.LoadPatterns.Add('2', ret = SapModel.LoadPatterns.Add('3', ret = SapModel.LoadPatterns.Add('4', ret = SapModel.LoadPatterns.Add('5', ret = SapModel.LoadPatterns.Add('6', ret = SapModel.LoadPatterns.Add('7',
LTYPE_OTHER, LTYPE_OTHER, LTYPE_OTHER, LTYPE_OTHER, LTYPE_OTHER, LTYPE_OTHER, LTYPE_OTHER,
1, 0, 0, 0, 0, 0, 0,
True) True) True) True) True) True) True)
#assign loading for load pattern 2 [PointName1, PointName2, ret] = SapModel.FrameObj.GetPoints(FrameName3, PointName1, PointName2) PointLoadValue = [0,0,-10,0,0,0] ret = SapModel.PointObj.SetLoadForce(PointName1, '2', PointLoadValue) ret = SapModel.FrameObj.SetLoadDistributed(FrameName3, '2', 1, 10, 0, 1, 1.8, 1.8) #assign loading for load pattern 3 [PointName1, PointName2, ret] = SapModel.FrameObj.GetPoints(FrameName3, PointName1, PointName2) PointLoadValue = [0,0,-17.2,0,-54.4,0] ret = SapModel.PointObj.SetLoadForce(PointName2, '3', PointLoadValue) #assign loading for load pattern 4 ret = SapModel.FrameObj.SetLoadDistributed(FrameName2, '4', 1, 11, 0, 1, 2, 2) #assign loading for load pattern 5 ret = SapModel.FrameObj.SetLoadDistributed(FrameName1, '5', 1, 2, 0, 1, 2, 2, 'Local') Page 3
Etabs oapi ret = SapModel.FrameObj.SetLoadDistributed(FrameName2, '5', 1, 2, 0, 1, -2, -2, 'Local') #assign loading for load pattern 6 ret = SapModel.FrameObj.SetLoadDistributed(FrameName1, '6', 1, 2, 0, 1, 0.9984, 0.3744, 'Local') ret = SapModel.FrameObj.SetLoadDistributed(FrameName2, '6', 1, 2, 0, 1, -0.3744, 0, 'Local') #assign loading for load pattern 7 ret = SapModel.FrameObj.SetLoadPoint(FrameName2, '7', 1, 2, 0.5, -15, 'Local') ###switch to k-in units ##kip_in_F = 3 ##ret = SapModel.SetPresentUnits(kip_in_F) #save model ret = SapModel.File.Save(ModelPath) #run model (this will create the analysis model) ret = SapModel.Analyze.RunAnalysis() #initialize for results ProgramResult = [0,0,0,0,0,0,0] ProgramResult1 = [0,0,0,0,0,0,0] [PointName1, PointName2, ret] = SapModel.FrameObj.GetPoints(FrameName2, PointName1, PointName2) #get results for load cases 1 through 7 for i in range(0,7): NumberResults = 0 Obj = [] Elm = [] ACase = [] StepType = [] StepNum = [] U1 = [] U2 = [] U3 = [] R1 = [] R2 = [] R3 = [] ObjectElm = 0 ret = SapModel.Results.Setup.Deselect AllCasesAndCombosForOutput() ret = SapModel.Results.Setup.SetCaseS electedForOutput(str(i + 1)) if i <= 3: [NumberResults, Obj, Elm, ACase, StepType, StepNum, U1, U2, U3, R1, R2, R3, ret] = SapModel.Results.JointDispl(PointName2, ObjectElm, NumberResults, Obj, Page 4
Etabs oapi Elm, ACase, StepType, StepNum, U1, U2, U3, R1, R2, R3) ProgramResult[i] = U3[0] else: [NumberResults, Obj, Elm, ACase, StepType, StepNum, U1, U2, U3, R1, R2, R3, ret] = SapModel.Results.JointDispl(PointName1, ObjectElm, NumberResults, Obj, Elm, ACase, StepType, StepNum, U1, U2, U3, R1, R2, R3) ProgramResult[i] = U1[0] for i in range(0,7): NumberResults = 0 PointElm ='' Obj = [] Elm = [] ACase = [] StepType = [] StepNum = [] F1 = [] F2 = [] F3 = [] M1 = [] M2 = [] M3 = [] ObjectElm = 1 ret = SapModel.Results.Setup.Deselect AllCasesAndCombosForOutput() ret = SapModel.Results.Setup.SetCaseS electedForOutput(str(i + 1)) [NumberResults, Obj, Elm, PointElm, ACase, StepType, StepNum, F1, F2, F3, M1, M2, M3, ret] = SapModel.Results.FrameJointForce("1", ObjectElm, NumberResults, Obj, Elm, PointElm, ACase, StepType, StepNum, F1, F2, F3, M1, M2, M3) ProgramResult1[i] = F3[0] #close the program ret = myETABSObject.ApplicationExit(False) SapModel = None myETABSObject = None #fill independent results IndResult = [0,0,0,0,0,0,0] IndResult[0] = -0.02639 IndResult[1] = 0.06296 IndResult[2] = 0.06296 IndResult[3] = -0.2963 IndResult[4] = 0.3125 IndResult[5] = 0.11556 IndResult[6] = 0.00651 #fill percent difference PercentDiff = [0,0,0,0,0,0,0] Page 5
Etabs oapi for i in range(0,7): PercentDiff[i] = (ProgramResult[i] / IndResult[i]) - 1 #display results for i in range(0,7): print() print(ProgramResult[i]) print(IndResult[i]) print(PercentDiff[i]) print(ProgramResult1[i])
Page 6
