CivilFEM for ANSYS is a civil engineering extension for ANSYS Mechanical that adds full Eurocode, ACI, and AASHTO code-checking to the industrial-grade ANSYS FEA engine. ETABS and SAP2000 are purpose-built structural analysis programs with their own simplified FEA solvers — they excel at standard building frame analysis but have limitations for complex nonlinear problems (nonlinear cracked concrete, soil-structure interaction, arbitrary 3D geometry). CivilFEM combines the best of both worlds: the full nonlinear physics of ANSYS Mechanical (Drucker-Prager concrete, Mohr-Coulomb soil, contact) with automatic Eurocode compliance checking. For standard buildings, ETABS is faster; for complex infrastructure (bridges, tunnels, dams) and seismic nonlinear analysis, CivilFEM is more powerful.

CivilFEM implements: EC2 (EN 1992) — reinforced and prestressed concrete design: bending, shear, torsion, punching, cracking, deflections; EC3 (EN 1993) — steel structures: member buckling, LTB, connections; EC4 (EN 1994) — composite steel-concrete; EC7 (EN 1997) — geotechnical design: foundations, piles, slopes, retaining walls; EC8 (EN 1998) — seismic design: MRSA, Pushover, THА. National annexes (NDPs) for different countries are supported. Additionally ACI 318 and AASHTO LRFD for US-standard projects.

CivilFEM supports three EC8 analysis methods: (1) Modal Response Spectrum Analysis (MRSA) — linear dynamic analysis using the EC8 design spectrum; the most common method for regular buildings and bridges. (2) Nonlinear Static Pushover (NSP) — incremental lateral loading to the collapse mechanism; gives the capacity curve and target displacement per EC8 Annex B. (3) Nonlinear Time History Analysis (THA) — direct integration under accelerogram records; the most accurate method for irregular structures and performance-based seismic assessment. CivilFEM also checks structural regularity criteria, ductility class requirements (DCL/DCM/DCH), and detailing rules per EC8.

CivilFEM automatically extracts the 3D FEA stress and strain resultants (bending moments, shear forces, normal forces) at every cross-section from ANSYS Mechanical, and applies the EC2 design formulae to compute required steel area As,req. Output: reinforcement density maps on the 3D model surface — showing As,req (cm²/m for plates and slabs, cm² for beams and columns) from which the structural engineer selects bar diameters and spacing. For columns: combined bending-axial interaction (N-M) diagrams are automatically generated. CivilFEM also checks crack width and deflection limits per EC2 Section 7.

Yes. CivilFEM combined with ANSYS Mechanical provides full soil-structure interaction analysis: nonlinear soil constitutive models (Mohr-Coulomb, Drucker-Prager, Cam-Clay) are applied to the soil continuum; contact elements model the interface between the structure (tunnel lining, pile, foundation) and soil, including separation and sliding; construction staging simulates excavation sequences. This level of SSI detail is essential for deep tunnel design in urban environments, pile group settlement, and foundation design on soft soils — going far beyond the simplified spring models used in standard structural programs.

Yes. CADFEM Ukraine provides all CivilFEM services in English: official license procurement, technical support, structural engineering consulting with English-language Eurocode reports, and training courses. We support international engineering firms working in Ukraine, Ukrainian engineering consultancies participating in EU-funded reconstruction projects, and structural engineers needing Eurocode analysis reports accepted by European donor organizations (World Bank, EBRD, EU institutions).