Robot → MIDAS Design (RC Beam) — Required Data Checklist
Smart-Book សម្រាប់ Sarim Insight បង្ហាញទិន្នន័យចាំបាច់ដែលត្រូវយកពី Robot Structural Analysis ទៅបំពេញក្នុង MIDAS Design (RC Design) ដើម្បីឲ្យ design មិនខុសអ័ក្ស និងមិនខាតសុវត្ថិភាព។
ACI 318M-19 Robot → MIDAS RC Beam ULS / SLS1) Geometry & Section Data (ទំហំ + ប្រវែង + cover)
- Beam section: b × h (ឧ. 200×450)
- Effective depth d ឬ cover + bar dia + stirrup dia
- Span / member length
- Support condition: simple / continuous / cantilever
- Slab participation (T-beam): flange width, slab thickness
Tip: MIDAS អាចគណនា d បានដោយស្វ័យប្រវត្តិ បើ cover និង bar dia ត្រឹមត្រូវ
2) Material & Code Setup (សម្ភារៈ + កូដ)
- Design code: ACI 318M-19 (Metric)
- Concrete strength f’c (MPa)
- Steel fy (MPa) – main bar & stirrup
- Es (optional, MIDAS default)
- φ factors (auto by code)
- Exposure / cover rule (if used)
3) Design Forces from Robot (ចំណុចសំខាន់បំផុត)
A) Load combinations
- ULS combos (Strength design)
- SLS combos (Deflection / crack check)
B) Member internal forces
- Mu – Bending moment (usually M3)
- Vu – Shear force (V2 / V3 depends axis)
- Tu – Torsion (if any)
- N – Axial force (rare but possible)
✅ Always take Envelope (Max / Min) values:
- Mu+ / Mu−
- Vu max
- T max (if torsion)
C) Station locations
- Support face
- d from face of support (shear critical)
- Midspan
- Cantilever: fixed end + near face
4) Rebar Detailing Inputs (MIDAS requires)
- Bar sizes (D10, D12, D16, …)
- Number of layers allowed (1–2)
- Min clear spacing rules (optional)
- Stirrup type (2 legs / 4 legs) + size
- Rebar cover (top / bottom / side)
- Development length / hook type
5) Boundary & Modeling Consistency Check (សំខាន់!)
- Local axis direction (M3 / V2 / V3) must match
- End releases (pinned / fixed) same as Robot
- Self-weight ON / OFF consistent
- Cracked section modifiers (for SLS)
⚠️ 80% of wrong MIDAS results come from wrong axis (M2 vs M3)
✅ Quick Checklist (Copy for site / notes)
From Robot:
Beam list + section + span
Materials f’c, fy
ULS combos used
Mu+/Mu−, Vu max, T max
Forces at support / d / midspan
Confirm major axis (M3?)
Into MIDAS Design:
Code ACI 318M-19
Section + cover + bars
Input envelopes Mu/Vu/T
Run flexure / shear / torsion