feat: initial otko import

examples/data/Ex1b.Portal2D.Push.tcl.txt

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+# --------------------------------------------------------------------------------------------------
+# Example 1. portal frame in 2D
+# static pushover analysis of Portal Frame, with gravity.
+# all units are in kip, inch, second
+# elasticBeamColumn ELEMENT
+#		Silvia Mazzoni & Frank McKenna, 2006
+#
+#    ^Y
+#    |
+#    3_________(3)________4       __ 
+#    |                                    |          | 
+#    |                                    |          |
+#    |                                    |          |
+#  (1)                                 (2)       LCol
+#    |                                    |          |
+#    |                                    |          |
+#    |                                    |          |
+#  =1=                               =2=      _|_  -------->X
+#    |----------LBeam------------|
+#
+
+# SET UP ----------------------------------------------------------------------------
+wipe;						# clear opensees model
+model basic -ndm 2 -ndf 3;				# 2 dimensions, 3 dof per node
+file mkdir Data; 					# create data directory
+
+# define GEOMETRY -------------------------------------------------------------
+# nodal coordinates:
+node 1 0 0;					# node#, X Y
+node 2 504 0
+node 3 0 432
+node 4 504 432 
+
+# Single point constraints -- Boundary Conditions
+fix 1 1 1 1; 			# node DX DY RZ
+fix 2 1 1 1; 			# node DX DY RZ
+fix 3 0 0 0
+fix 4 0 0 0
+
+# nodal masses:
+mass 3 5.18 0. 0.;					# node#, Mx My Mz, Mass=Weight/g.
+mass 4 5.18 0. 0.
+
+# Define ELEMENTS -------------------------------------------------------------
+# define geometric transformation: performs a linear geometric transformation of beam stiffness and resisting force from the basic system to the global-coordinate system
+geomTransf Linear 1;  		# associate a tag to transformation
+
+# connectivity: (make A very large, 10e6 times its actual value)
+element elasticBeamColumn 1 1 3 3600000000 4227 1080000 1;	# element elasticBeamColumn $eleTag $iNode $jNode $A $E $Iz $transfTag
+element elasticBeamColumn 2 2 4 3600000000 4227 1080000 1
+element elasticBeamColumn 3 3 4 5760000000 4227 4423680 1
+
+# Define RECORDERS -------------------------------------------------------------
+recorder Node -file Data/DFree.out -time -node 3 4 -dof 1 2 3 disp;			# displacements of free nodes
+recorder Node -file Data/DBase.out -time -node 1 2 -dof 1 2 3 disp;			# displacements of support nodes
+recorder Node -file Data/RBase.out -time -node 1 2 -dof 1 2 3 reaction;		# support reaction
+recorder Drift -file Data/Drift.out -time -iNode 1 2 -jNode 3 4 -dof 1  -perpDirn 2 ;	# lateral drift
+recorder Element -file Data/FCol.out -time -ele 1 2 globalForce;			# element forces -- column
+recorder Element -file Data/FBeam.out -time -ele 3 globalForce;			# element forces -- beam
+
+# define GRAVITY -------------------------------------------------------------
+pattern Plain 1 Linear {
+   eleLoad -ele 3 -type -beamUniform -7.94 ; # distributed superstructure-weight on beam
+}
+
+
+
+
+constraints Plain;     				# how it handles boundary conditions
+numberer Plain;					# renumber dof's to minimize band-width (optimization), if you want to
+system BandGeneral;				# how to store and solve the system of equations in the analysis
+test NormDispIncr 1.0e-8 6 ; 				# determine if convergence has been achieved at the end of an iteration step
+algorithm Newton;					# use Newton's solution algorithm: updates tangent stiffness at every iteration
+integrator LoadControl 0.1;				# determine the next time step for an analysis, # apply gravity in 10 steps
+analysis Static					# define type of analysis static or transient
+analyze 10;					# perform gravity analysis
+loadConst -time 0.0;				# hold gravity constant and restart time
+
+# define LATERAL load -------------------------------------------------------------
+# Lateral load pattern
+pattern Plain 2 Linear {
+	load 3 2000. 0.0 0.0;			# node#, FX FY MZ -- representative lateral load at top nodes
+	load 4 2000. 0.0 0.0;			# place 1/2 of the weight for each node to get shear coefficient
+}
+
+# pushover: diplacement controlled static analysis
+integrator DisplacementControl 3 1 0.1;		# switch to displacement control, for node 11, dof 1, 0.1 increment
+analyze 100;					# apply 100 steps of pushover analysis to a displacement of 10
+
+puts "Done!"
+
+
+
+