73 lines
2.5 KiB
Python
73 lines
2.5 KiB
Python
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"""Integration tests for OpenSees Example 2b nonlinear cantilever."""
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from __future__ import annotations
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import tempfile
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from pathlib import Path
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import pytest
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pytest.importorskip("openseespy")
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from otko.core import PushoverCase, TransientCase # noqa: E402
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from otko.services import load_project, save_project # noqa: E402
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from otko.services.opensees_runner import OpenSeesRunner # noqa: E402
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def _reload(proj, tmp_path): # type: ignore[no-untyped-def]
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path = tmp_path / "ex2b_canti2d_inelastic_section.osmodel"
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save_project(proj, path)
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reloaded = load_project(path)
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reloaded.validate_references()
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return reloaded
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def test_ex2b_canti2d_pushover_yields_and_softens(tmp_path) -> None: # type: ignore[no-untyped-def]
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from examples.ex2b_canti2d_inelastic_section import (
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PUSH_STEP,
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PUSH_TARGET,
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build_ex2b_canti2d_inelastic_section,
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)
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proj = _reload(build_ex2b_canti2d_inelastic_section(), tmp_path)
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push_case = next(c for c in proj.analyses if isinstance(c, PushoverCase))
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result = OpenSeesRunner(proj).run(push_case)
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expected_pts = int(PUSH_TARGET / PUSH_STEP) + 1
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assert len(result.control_disp) == expected_pts
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assert result.control_disp[-1] == pytest.approx(PUSH_TARGET, rel=1e-6)
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# Nonlinear section should show a reduced post-yield tangent.
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early_slope = (result.base_shear[5] - result.base_shear[0]) / (
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result.control_disp[5] - result.control_disp[0]
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)
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late_slope = (result.base_shear[-1] - result.base_shear[-6]) / (
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result.control_disp[-1] - result.control_disp[-6]
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)
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assert early_slope > 5.0 * late_slope
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assert max(result.base_shear) > 0.0
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def test_ex2b_canti2d_earthquake_runs_and_oscillates(tmp_path) -> None: # type: ignore[no-untyped-def]
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from examples.ex2b_canti2d_inelastic_section import (
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ANALYSIS_DT,
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ANALYSIS_STEPS,
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build_ex2b_canti2d_inelastic_section,
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)
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proj = _reload(build_ex2b_canti2d_inelastic_section(), tmp_path)
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eq_case = next(c for c in proj.analyses if isinstance(c, TransientCase))
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results_dir = Path(tempfile.mkdtemp(prefix="ex2b_canti2d_eq_"))
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result = OpenSeesRunner(proj).run(eq_case, results_dir=results_dir)
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time = result.time()
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top = result.node_disp_history(2)
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ux = top[:, 0]
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uy = top[:, 1]
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assert len(time) == ANALYSIS_STEPS
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assert result.dt == pytest.approx(ANALYSIS_DT)
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assert ux.max() > 1e-4
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assert ux.min() < -1e-4
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assert max(abs(uy)) < 1.0
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