Add generated beam cross-section figure to concrete-beam
Add reinforcement inputs (cover, stirrup size/spacing, longitudinal and top bar size/count) and emit the derived bar geometry from calc.py. beam_section.py renders a native Typst drawing of the section to assets/beam-section.typ, which concrete-beam.typ imports as a figure. Effective depth d remains authoritative for the tension-steel position.
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8 changed files with 973 additions and 568 deletions
201
concrete-beam/beam_section.py
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201
concrete-beam/beam_section.py
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from __future__ import annotations
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import sys
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from pathlib import Path
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HERE = Path(__file__).resolve().parent
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SCALE = 14.0 # points per inch
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LEFT = 80.0
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RIGHT = 110.0
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TOP = 34.0
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BOTTOM = 44.0
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MUTED = 'rgb("#626b73")'
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def _f(value: float) -> str:
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return f"{value:.4g}"
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def _centers(size: float, number: int, bw: float, cover: float, stirrup_db: float) -> list[float]:
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half = size / 2.0
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left = cover + stirrup_db + half
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right = bw - left
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if number == 1:
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return [bw / 2.0]
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return [left + index * (right - left) / (number - 1) for index in range(number)]
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def render(values: dict) -> str:
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s = SCALE
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bw = float(values["bw"])
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h = float(values["h"])
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d = float(values["d"])
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cover = float(values["cover"])
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stirrup_size = int(values["stirrup_size"])
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stirrup_db = float(values["stirrup_db"])
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stirrup_spacing = float(values["stirrup_spacing"])
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bar_size = int(values["bar_size"])
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bar_db = float(values["bar_db"])
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n_bars = int(values["n_bars"])
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top_bar_size = int(values["top_bar_size"])
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top_bar_db = float(values["top_bar_db"])
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n_top_bars = int(values["n_top_bars"])
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As = float(values["As"])
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w_sec = bw * s
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h_sec = h * s
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width = LEFT + w_sec + RIGHT
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height = TOP + h_sec + BOTTOM
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ox = LEFT
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oy = TOP
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def sx(x_in: float) -> float:
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return ox + x_in * s
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def sy(y_in: float) -> float:
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return oy + (h - y_in) * s
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inset = cover + stirrup_db / 2.0
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y_bottom = h - d
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bottom = _centers(bar_db, n_bars, bw, cover, stirrup_db)
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top_y = h - (cover + stirrup_db + top_bar_db / 2.0)
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top = _centers(top_bar_db, n_top_bars, bw, cover, stirrup_db)
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lines: list[str] = []
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add = lines.append
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add("// Generated by beam_section.py from input.yaml - do not edit by hand.")
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add("#let beam-section() = {")
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add(f" box(width: {_f(width)}pt, height: {_f(height)}pt)[")
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add(
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f" #place(dx: {_f(ox)}pt, dy: {_f(oy)}pt, "
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f'rect(width: {_f(w_sec)}pt, height: {_f(h_sec)}pt, fill: rgb("#f2f2f2"), stroke: 1pt + black))'
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)
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add(
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f" #place(dx: {_f(sx(inset))}pt, dy: {_f(sy(h - inset))}pt, "
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f"rect(width: {_f((bw - 2.0 * inset) * s)}pt, height: {_f((h - 2.0 * inset) * s)}pt, "
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f"radius: 1.5pt, stroke: {_f(stirrup_db * s)}pt + black))"
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)
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for x_in in bottom:
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r = bar_db / 2.0 * s
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add(
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f" #place(dx: {_f(sx(x_in) - r)}pt, dy: {_f(sy(y_bottom) - r)}pt, "
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f"circle(radius: {_f(r)}pt, fill: black))"
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)
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for x_in in top:
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r = top_bar_db / 2.0 * s
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add(
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f" #place(dx: {_f(sx(x_in) - r)}pt, dy: {_f(sy(top_y) - r)}pt, "
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f"circle(radius: {_f(r)}pt, fill: black))"
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)
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dim_y = oy + h_sec + 16.0
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add(
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f" #place(line(start: ({_f(ox)}pt, {_f(dim_y)}pt), end: ({_f(ox + w_sec)}pt, {_f(dim_y)}pt), "
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f"stroke: 0.6pt + black))"
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)
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for tick in (ox, ox + w_sec):
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add(
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f" #place(line(start: ({_f(tick)}pt, {_f(dim_y - 4)}pt), end: ({_f(tick)}pt, {_f(dim_y + 4)}pt), "
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f"stroke: 0.6pt + black))"
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)
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add(
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f" #place(dx: {_f(ox)}pt, dy: {_f(dim_y + 3)}pt, "
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f'box(width: {_f(w_sec)}pt, align(center)[$b_w = {_f(bw)} " in"$]))'
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)
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x_h = ox - 12.0
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add(
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f" #place(line(start: ({_f(x_h)}pt, {_f(oy)}pt), end: ({_f(x_h)}pt, {_f(oy + h_sec)}pt), "
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f"stroke: 0.6pt + black))"
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)
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for tick in (oy, oy + h_sec):
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add(
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f" #place(line(start: ({_f(x_h - 4)}pt, {_f(tick)}pt), end: ({_f(x_h + 4)}pt, {_f(tick)}pt), "
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f"stroke: 0.6pt + black))"
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)
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add(
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f" #place(dx: 2pt, dy: {_f(oy + h_sec / 2.0 - 5)}pt, "
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f'text(size: 8pt)[$h = {_f(h)} " in"$])'
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)
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x_d = ox - 30.0
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d_end = oy + d * s
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add(
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f" #place(line(start: ({_f(x_d)}pt, {_f(oy)}pt), end: ({_f(x_d)}pt, {_f(d_end)}pt), "
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f"stroke: 0.6pt + black))"
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)
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for tick in (oy, d_end):
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add(
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f" #place(line(start: ({_f(x_d - 4)}pt, {_f(tick)}pt), end: ({_f(x_d + 4)}pt, {_f(tick)}pt), "
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f"stroke: 0.6pt + black))"
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)
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add(
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f" #place(dx: 2pt, dy: {_f((oy + d_end) / 2.0 - 5)}pt, "
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f'text(size: 8pt)[$d = {_f(d)} " in"$])'
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)
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label_x = ox + w_sec + 16.0
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lead_x = ox + w_sec + 12.0
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def leader(fx: float, fy: float, lx: float, ly: float) -> None:
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add(
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f" #place(line(start: ({_f(fx)}pt, {_f(fy)}pt), end: ({_f(lx)}pt, {_f(ly)}pt), "
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f"stroke: 0.5pt + {MUTED}))"
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)
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add(f" #place(dx: {_f(fx - 1.5)}pt, dy: {_f(fy - 1.5)}pt, circle(radius: 1.5pt, fill: black))")
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leader(sx(top[-1]), sy(top_y), lead_x, oy + 18.0)
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add(
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f" #place(dx: {_f(label_x)}pt, dy: {_f(oy + 12)}pt, "
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f"text(size: 7.5pt)[{n_top_bars} No. {top_bar_size} hanger \\ bars])"
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)
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leader(sx(bw - inset), sy(h / 2.0), lead_x, oy + h_sec / 2.0 - 4.0)
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add(
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f" #place(dx: {_f(label_x)}pt, dy: {_f(oy + h_sec / 2.0 - 10)}pt, "
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f"text(size: 7.5pt)[No. {stirrup_size} stirrup \\ at {_f(stirrup_spacing)} in o.c.])"
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)
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leader(sx(bottom[-1]), sy(y_bottom), lead_x, oy + h_sec - 18.0)
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add(
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f" #place(dx: {_f(label_x)}pt, dy: {_f(oy + h_sec - 24)}pt, "
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f'text(size: 7.5pt)[{n_bars} No. {bar_size} bottom \\ $A_s = {_f(As)} " in"^2$])'
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)
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leader(sx(inset), sy(inset), 40.0, oy + h_sec + 26.0)
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add(
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f" #place(dx: 2pt, dy: {_f(oy + h_sec + 30)}pt, "
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f'text(size: 7.5pt)[cover = {_f(cover)} in])'
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)
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add(" ]")
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add("}")
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return "\n".join(lines) + "\n"
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def write_fragment(values: dict, path: Path) -> None:
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path.write_text(render(values), encoding="utf-8")
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def main(argv: list[str] | None = None) -> int:
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argv = sys.argv[1:] if argv is None else argv
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input_path = Path(argv[0]) if argv else HERE / "input.yaml"
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output_path = Path(argv[1]) if len(argv) > 1 else HERE / "assets" / "beam-section.typ"
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import yaml
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import calc
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with input_path.open(encoding="utf-8") as handle:
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result = calc.compute(yaml.safe_load(handle))
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write_fragment(result["values"], output_path)
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print(output_path)
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return 0
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if __name__ == "__main__":
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raise SystemExit(main())
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