Structural Applications
- Global behaviour of irregular and complex structural systems
- Local response at connections, supports, openings and load-introduction regions
- Reinforced-concrete, structural-steel, masonry and mixed structural systems
- Existing structures, modifications, repairs and strengthening interventions
- Offshore structures under fabrication, transport, installation and in-place conditions
- Pipeline, support, crossing and interface studies
- Industrial frames, platforms, equipment supports and vibration-sensitive systems
- Slender, stability-sensitive and second-order structural systems
- Temporary works, staged construction and changing support conditions
- Structures subject to imposed deformation, thermal restraint or differential movement
- Important components requiring refined stress, deformation or fatigue-sensitive assessment
Analysis Classes
- Linear static and elastic finite-element analysis
- Modal, harmonic and transient dynamic analysis where applicable
- Response-spectrum and response-history analysis
- Eigenvalue buckling and nonlinear stability analysis
- Geometric and material nonlinear analysis
- Contact, bearing, gap and interface modelling
- Staged construction, activation, removal and sequence-dependent response
- Local shell and solid submodelling
- Connection, anchorage and joint behaviour
- Thermal and imposed-deformation response where relevant
- Soil, support and foundation interaction where project data permit
- Stress-range and fatigue-sensitive assessment where required
- Parametric, probabilistic-input and sensitivity studies as appropriate
- Structural optimization and alternative-system comparison
Material Mechanics and Constitutive Response
Material behaviour is treated as part of the structural model, not as a generic property assigned after the system has been idealized. The required level of representation is selected from the decision at hand: elastic stiffness may be sufficient for one study, while cracking, yielding, crushing, cyclic degradation, creep, shrinkage, fracture, bond, contact or interface response may govern another.
Potential scopes include:
- Elastic, inelastic and time-dependent response of concrete, steel, masonry and mixed systems
- Cracking, tension stiffening, compression damage, yielding and plastic redistribution
- Cyclic response, stiffness degradation, hysteresis and low-cycle damage
- Fatigue and fracture-sensitive material or detail behaviour
- Bond, anchorage, bearing, contact, gap and interface mechanisms
- Creep, shrinkage, thermal strain and restrained deformation
- Calibration of constitutive inputs from project data, recognized references or available test evidence
- Sensitivity studies where material uncertainty materially affects demand, resistance or serviceability
- Translation of local material response into member, connection and system-level conclusions
Material inputs, constitutive assumptions and acceptance measures are documented with the same discipline as geometry, actions and boundary conditions. Refined material models are used only when they improve the reliability or usefulness of the engineering decision.
Finite-Element Idealization
Models may use truss, beam, frame, cable, grillage, plate, shell, spring, link, contact and solid elements according to the physical mechanism being studied. Element formulation, mesh density, releases, rigid offsets, constraints, imperfections, constitutive behaviour and result extraction are selected deliberately; they are not accepted merely because they are software defaults.
Global and local models are coordinated so that forces, stiffness and boundary conditions are transferred consistently. Where local peak stress is reported, its physical meaning, mesh dependence and relationship to the governing acceptance criterion are established before it is used for design.
Structural Dynamics and Seismic Engineering
Dynamic and seismic work forms a specialist part of the wider FEA capability. Potential scopes include natural-frequency and mode-shape evaluation, modal participation, vibration response, dynamic amplification, response-spectrum analysis, linear response-history analysis, nonlinear pushover analysis and nonlinear response-history analysis.
Seismic studies begin with the performance objective, hazard representation, structural system and governing code. Mass, stiffness, damping, diaphragm behaviour, irregularity, ductility, drift, stability and component acceptance are addressed at the level required by the project.
OpenSees is used where its nonlinear and earthquake-simulation capabilities suit the problem. It is one part of the computational toolkit, not the boundary of the service.
Indigenous Engineering Tools
STRUCTOLYX® develops internally controlled computational tools and workflows with industry-grade capabilities to support engineering analysis. Depending on the project, these tools may be used for:
- Parametric geometry and model generation
- Load derivation, transformation and combination processing
- Batch analysis and design-envelope generation
- Code-check and utilization automation
- Sensitivity studies and controlled parameter variation
- Model-input consistency and quality-control checks
- Result extraction, filtering and engineering interrogation
- Comparison of global and local model results
- Reproducible calculation tables and technical reporting
- Traceable data transfer between analysis and design checks
Internally developed tools are governed as engineering calculations. Their scope, assumptions and limitations are documented, and critical routines are checked against closed-form solutions, benchmark problems, established software, published examples or independent calculations before reliance.
Model Assurance
Every advanced model should answer seven questions:
1. Which physical behaviour and design situation does the model represent?
2. Which assumptions control stiffness, load path, stability and resistance?
3. How were actions, combinations, mass, damping and boundary conditions established?
4. Is the element formulation and discretization appropriate to the required result?
5. Are nonlinear, contact or staged behaviours represented consistently?
6. How was the model verified against equilibrium, limiting cases, benchmarks or independent calculations?
7. What conclusion can the model legitimately support, and where do uncertainty or limitations remain?
Deliverables
- Analysis-basis and modelling-strategy document
- Model description and structural idealization diagrams
- Load, mass, damping, sequence and combination definitions
- Material, section, interface and boundary-condition register
- Verification, benchmark and sensitivity record
- Governing response, limit-state and acceptance checks
- Advanced finite-element analysis report
- Seismic, dynamic, stability or nonlinear study where included
- Design, optimization or strengthening recommendations where appointed
- Reproducible calculation and internally developed tool outputs where relevant