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feat: initial otko import
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smillmorel 2026-09-08 02:12:15 -04:00
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examples/basic_truss.osmodel Normal file
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{
"schema_version": 1,
"meta": {
"name": "Basic Truss",
"description": "3-bar asymmetric planar truss, linear static analysis.",
"author": "OpenSees Examples Manual - Example 1",
"units": "SI (m, N, kg, s, Pa)"
},
"ndm": 2,
"ndf": 2,
"coord_systems": [
{
"name": "Global",
"coord": {
"origin": [
0.0,
0.0,
0.0
],
"rotation_deg": [
0.0,
0.0,
0.0
]
},
"grid": {
"x_grid_lines": [
{
"id": "X1",
"ordinate": 0.0,
"line_type": "Primary",
"visible": true,
"bubble_loc": "End",
"color": "#808080"
},
{
"id": "X2",
"ordinate": 1.8288,
"line_type": "Primary",
"visible": true,
"bubble_loc": "End",
"color": "#808080"
},
{
"id": "X3",
"ordinate": 3.6576,
"line_type": "Primary",
"visible": true,
"bubble_loc": "End",
"color": "#808080"
},
{
"id": "X4",
"ordinate": 4.2672,
"line_type": "Primary",
"visible": true,
"bubble_loc": "End",
"color": "#808080"
}
],
"y_grid_lines": [
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"ordinate": 0.0,
"line_type": "Primary",
"visible": true,
"bubble_loc": "End",
"color": "#808080"
},
{
"id": "Y2",
"ordinate": 2.4383999999999997,
"line_type": "Primary",
"visible": true,
"bubble_loc": "End",
"color": "#808080"
}
],
"z_grid_lines": [
{
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"ordinate": 0.0,
"line_type": "Primary",
"visible": true,
"bubble_loc": "End",
"color": "#808080"
}
],
"visible": true,
"is_general": false,
"hide_all": false,
"glue_to_grid": false,
"bubble_size": 20
}
}
],
"nodes": [
{
"id": 1,
"name": "Base-L",
"coords": [
0.0,
0.0,
0.0
],
"mass": [
0.0,
0.0,
0.0,
0.0,
0.0,
0.0
],
"restraint": [
true,
true,
false,
false,
false,
false
]
},
{
"id": 2,
"name": "Base-M",
"coords": [
3.6576,
0.0,
0.0
],
"mass": [
0.0,
0.0,
0.0,
0.0,
0.0,
0.0
],
"restraint": [
true,
true,
false,
false,
false,
false
]
},
{
"id": 3,
"name": "Base-R",
"coords": [
4.2672,
0.0,
0.0
],
"mass": [
0.0,
0.0,
0.0,
0.0,
0.0,
0.0
],
"restraint": [
true,
true,
false,
false,
false,
false
]
},
{
"id": 4,
"name": "Crown",
"coords": [
1.8288,
2.4383999999999997,
0.0
],
"mass": [
0.0,
0.0,
0.0,
0.0,
0.0,
0.0
],
"restraint": [
false,
false,
false,
false,
false,
false
]
}
],
"materials": [
{
"id": 1,
"name": "Steel-3000ksi",
"type": "Elastic",
"E": 20685000000.0,
"eta": 0.0,
"Eneg": null
}
],
"sections": [],
"elements": [
{
"id": 1,
"name": "Bar-1-4",
"type": "Truss",
"nodes": [
1,
4
],
"area": 0.0064516,
"material_id": 1,
"rho": 0.0
},
{
"id": 2,
"name": "Bar-2-4",
"type": "Truss",
"nodes": [
2,
4
],
"area": 0.0032258,
"material_id": 1,
"rho": 0.0
},
{
"id": 3,
"name": "Bar-3-4",
"type": "Truss",
"nodes": [
3,
4
],
"area": 0.0032258,
"material_id": 1,
"rho": 0.0
}
],
"time_series": [
{
"id": 1,
"name": "Ramp",
"type": "Linear",
"factor": 1.0
}
],
"load_patterns": [
{
"id": 1,
"name": "Tip Load",
"type": "Plain",
"time_series_id": 1,
"nodal_loads": [
{
"node_id": 4,
"forces": [
444822.16,
-222411.08,
0.0,
0.0,
0.0,
0.0
]
}
],
"element_loads": []
}
],
"spectra": [],
"analyses": [
{
"id": 1,
"name": "Static",
"type": "Static",
"pattern_ids": [
1
],
"n_steps": 1,
"load_factor_increment": 1.0,
"system": "BandGeneral",
"constraints": "Plain",
"integrator": "LoadControl",
"algorithm": "Linear",
"test": "NormDispIncr",
"tolerance": 1e-08,
"max_iter": 25
}
]
}