29 lines
1.3 KiB
Markdown
29 lines
1.3 KiB
Markdown
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# Concrete Beam
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Simple-span rectangular reinforced concrete beam, checked per ACI 318 for flexure, minimum steel, and concrete shear under a uniform gravity load (1.2D + 1.6L).
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## Files
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- `input.yaml` — geometry, loads, materials, and reinforcement; units are carried in the values.
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- `calc.py` — computes the demands and capacities, writes `results.json`, and regenerates the cross-section figure.
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- `beam_section.py` — renders the cross-section as native Typst (`assets/beam-section.typ`), drawn to a fixed schematic cover.
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- `test_concrete_beam.py` — pytest checks of the demands, flexure, minimum steel, shear, reinforcement geometry, and the generated figure.
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- `concrete-beam.typ` — report; compiles to `concrete-beam.pdf`.
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`As` is derived from the provided bars (`n_bars`, `bar_size`).
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## Usage
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Edit `input.yaml`, then:
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```sh
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python3 calc.py # writes results.json and assets/beam-section.typ
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python3 -m pytest # checks the calculation and the generated figure
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typst compile concrete-beam.typ # builds concrete-beam.pdf
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```
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`calc.py` must be run before compiling so the figure matches the current inputs; the tests fail if `assets/beam-section.typ` is stale.
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## Requirements
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Python 3 with `pyyaml`, `pint`, `pytest`; Typst.
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