Structural engineering in the digital era extends far beyond 2D drawings and manual calculations. Structural BIM combined with Finite Element Analysis lets structural engineers verify building behaviour under multiple load conditions in full 3D detail before construction begins.
Autodesk Revit Structure: Structural BIM
Revit Structure creates 3D models of structural elements — beams, columns, slabs, foundations, and walls — each carrying complete BIM data: concrete grade (C25, C30, C35), rebar sizes (DB12–DB25), and material weights. Model data exports as .ifc or CIS/2 for direct import into ETABS, SAP2000, or Autodesk Robot Structural Analysis.
ETABS: Finite Element Analysis for Buildings
ETABS (Computers and Structures Inc.) is the industry standard for building structural analysis. It handles: Static Load Analysis (Dead + Live loads per EIT 1022-62), Wind Load Analysis (per Thai DPT standards: 25 m/s design wind speed for Bangkok), Seismic Analysis (Bangkok Zone 1 low-risk, but mandatory for buildings over 8 storeys), and P-Delta effects for tall structures.
Structural Optimisation
FEA results enable concrete grade optimisation, reducing the over-design common in conservative manual calculation. Structural BIM + FEA typically reduces structural material costs 8–15% — for example, specifying C30 instead of C35 in low-stress zones, or reducing beam cross-sections in short spans where stress allows.
Structural, Architectural, and MEP Clash Detection
Combining Structural BIM with Architectural and MEP models in BIM 360 Clash Detection reveals conflicts: beams passing through planned HVAC duct routes, columns conflicting with door or window positions. Discovering these on-site rather than in the model is extremely costly to remediate.
4D BIM: Linking Structure to Schedule
Linking BIM structural elements to the Construction Schedule (Gantt chart in MS Project or Primavera) creates a 4D BIM simulation showing the building rising over time. This helps contractors plan crane positions, formwork cycling, and material delivery sequences with precision.
Relevant Thai Standards
Thai structural engineers design to: มยผ. 1101-64 (reinforced concrete), มยผ. 1302-61 (wind loads), EIT Standard 1022-62 (structural loads), and Ministry of Interior Building Safety Regulations B.E.
- ETABS and SAP2000 both support direct input of Thai standard parameters.