ypshimandClaude Haiku 5.5
9ba7b55eab
- Material {fck, fyH, fyS}, defaults 27 / 400 / 500 as assumed values (I02).
The rebar calculations take the material: the C7/C8 splice, the P2 development
length, the P3 lap, and the B2 split use it instead of fixed numbers.
- ③ screen: 공통 설정 inputs with a note that the defaults are assumed (I02).
- Project file stores the material as an optional field; older files open with
the defaults.
- Tests: fck 27 → 35 shortens the laps by √(27/35); the C7 piece follows fck;
a non-default fy drops I02; the file round trip.
Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
92 lines
3.5 KiB
TypeScript
92 lines
3.5 KiB
TypeScript
/**
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* ③ 철근배근 공통 규칙 (spec §6.2 · plan C1). Lengths in mm, stresses in MPa.
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* fck and fy are inputs. The defaults below are assumed values and must be shown as such (I02).
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*/
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/** Material inputs of ③ 공통 설정 (spec §6.2). fck and fy are inputs; the defaults are assumed values (I02). */
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export interface Material {
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/** 콘크리트 강도 fck (MPa). */
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fck: number;
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/** H = SD400 항복강도 (MPa). */
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fyH: number;
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/** S = SD500 항복강도 (MPa). */
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fyS: number;
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}
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export const DEFAULT_MATERIAL: Material = { fck: 27, fyH: 400, fyS: 500 };
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/** True while the values are the assumed defaults (정보 I02 on the rebar screen). */
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export function isAssumedMaterial(m: Material): boolean {
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return m.fck === DEFAULT_MATERIAL.fck && m.fyH === DEFAULT_MATERIAL.fyH && m.fyS === DEFAULT_MATERIAL.fyS;
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}
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export const MATERIAL_DEFAULTS = {
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fck: 27,
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/** H = SD400, S = SD500. */
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fy: { H: 400, S: 500 } as const,
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/** 경량 콘크리트 계수 λ (보통 콘크리트 1.0). */
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lambda: 1.0,
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/** Marks that these are assumed values (정보 I02). */
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assumed: true,
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} as const;
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/** Development length l_d = 0.6·d_b·f_y / (λ·√f_ck) (spec §4 공통 설계 규약, 보정계수 1.0). */
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export function developmentLength(db: number, fy: number, fck: number, lambda = MATERIAL_DEFAULTS.lambda): number {
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if (db <= 0 || fy <= 0 || fck <= 0 || lambda <= 0) throw new Error('정착길이 계산 값은 모두 0보다 커야 합니다.');
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return (0.6 * db * fy) / (lambda * Math.sqrt(fck));
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}
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/** Lap splice length l_s = 1.3·l_d (spec §4 공통 설계 규약). */
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export function spliceLength(db: number, fy: number, fck: number, lambda = MATERIAL_DEFAULTS.lambda): number {
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return 1.3 * developmentLength(db, fy, fck, lambda);
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}
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/** Nominal diameters d (mm) of the bar sizes used in the documents (코핑철근.md, 기둥철근.md). */
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export const NOMINAL_DIAMETER = {
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D13: 12.7,
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H16: 15.9,
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H19: 19.1,
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D22: 22.2,
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H25: 25.4,
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H29: 28.6,
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S32: 31.8,
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D35: 34.9,
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/** SD500 names used by the footing document (same nominal diameters). */
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S16: 15.9,
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S19: 19.1,
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S25: 25.4,
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S29: 28.6,
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} as const;
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export type BarSize = keyof typeof NOMINAL_DIAMETER;
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export type HookKind = 'main90' | 'tie90' | 'stirrup135';
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/**
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* Standard hook lengths (KDS 14 20 52, spec §4). Refuses bar sizes outside the table rather than guessing.
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* - main90: 주철근 90°, D25 이하 15.5 d_b, D29–D35 16.5 d_b
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* - tie90: 띠철근 90°, D16 이하 8.5 d_b
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* - stirrup135: 스터럽 135°, 2.5·d_b·(3π/4) + 6·d_b (spec formula, as written)
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*/
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export function hookLength(kind: HookKind, db: number): number {
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if (kind === 'main90') {
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if (db <= 25) return 15.5 * db;
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if (db <= 35) return 16.5 * db;
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throw new Error(`주철근 90° 갈고리 표에 없는 지름입니다 (D${db}).`);
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}
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if (kind === 'tie90') {
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if (db <= 16) return 8.5 * db;
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throw new Error(`띠철근 90° 갈고리 표에 없는 지름입니다 (D${db}).`);
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}
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return 2.5 * db * ((3 * Math.PI) / 4) + 6 * db;
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}
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/**
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* Splice of a long bar into two pieces (추천안 for Q-B6): each piece is half the total plus half the lap,
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* and the lap is l_s = 1.3·l_d. Used only when the bar is longer than the standard bar length.
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*/
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export function splitPieces(total: number, db: number, fy: number, fck: number, standard: number): { pieces: number; pieceLength: number; lap: number } | null {
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if (total <= standard) return null;
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const lap = spliceLength(db, fy, fck);
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return { pieces: 2, pieceLength: total / 2 + lap / 2, lap };
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}
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