otko/tests/integration/test_rc_frame_pushover.py
smillmorel 61b850bf46
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style: resolve the remaining ruff findings
Auto-fixes (UP037, UP038, F401, I001, SIM105, RUF100) plus hand-fixes:
drop the now-unused `Union` imports, annotate mutable class attributes
with ClassVar, raise ValidationError instead of blind Exception in the
zero-length test, delete two dead locals, and bind the per-iteration
grid-builder closures to their loop variables (B023).
2026-09-16 13:20:36 -04:00

73 lines
2.7 KiB
Python

"""Integration test for RC Frame Pushover example (OpenSees Ex 3.2)."""
from __future__ import annotations
import pytest
pytest.importorskip("openseespy")
from otko.services import load_project, save_project
from otko.services.opensees_runner import OpenSeesRunner
pytestmark = pytest.mark.slow
def test_rc_frame_pushover_reaches_target_with_fallback(tmp_path) -> None: # type: ignore[no-untyped-def]
"""The 15-in pushover requires the ModifiedNewton convergence
fallback to finish; without it the Newton solver stalls in the
softening regime. This test asserts the full curve is produced
AND shows expected nonlinear shape.
"""
from examples.rc_frame_pushover import (
D_STEP,
D_TARGET,
build_rc_frame_pushover,
)
from otko.core import PushoverCase
proj = build_rc_frame_pushover()
proj.validate_references()
path = tmp_path / "rc_push.osmodel"
save_project(proj, path)
reloaded = load_project(path)
reloaded.validate_references()
# Pushover is one of several cases now (preload + pushover) — pick
# by type instead of index.
push_case = next(c for c in reloaded.analyses if isinstance(c, PushoverCase))
result = OpenSeesRunner(reloaded).run(push_case)
expected_pts = int(D_TARGET / D_STEP) + 1 # 151 including step 0
assert len(result.control_disp) == expected_pts, (
f"Got {len(result.control_disp)} points, expected {expected_pts} — "
"ModifiedNewton fallback probably didn't kick in."
)
# Reached the target displacement.
assert result.control_disp[-1] == pytest.approx(D_TARGET, rel=1e-3)
# Curve shape: monotonic climb followed by near-plateau (yielding).
# The elastic slope should exceed the post-yield slope by > 4x.
early_slope = (result.base_shear[10] - result.base_shear[0]) / (
result.control_disp[10] - result.control_disp[0]
)
late_slope = (result.base_shear[-1] - result.base_shear[-20]) / (
result.control_disp[-1] - result.control_disp[-20]
)
assert early_slope > 4 * late_slope, (
f"Early slope {early_slope:.2f} not >> late slope {late_slope:.2f} — "
"no yielding visible in the curve."
)
# Peak base shear in a reasonable band for this frame — 150-250 kip.
peak = max(abs(result.base_shear))
assert 100.0 < peak < 300.0, f"Peak base shear {peak:.1f} kip out of band"
# Gravity preload stayed applied — column axial force at the start
# of the pushover (step 1) should be close to P = 180 kip.
step1_col1 = result.element_forces[1][1]
axial_step1 = abs(step1_col1[0])
assert (
100.0 < axial_step1 < 260.0
), f"Col 1 axial at step 1 = {axial_step1:.1f} kip — gravity preload lost?"