Structural calculation and design
Global and local finite-element models, structural verification, strengthening solutions and working documentation for reinforced-concrete and steel structures.
Material and geometric nonlinearity
Global model → submodel → component
Temperature gradients and restraint
As-built geometry and properties
Selected assignments
The images are taken from the consolidated project presentation. The descriptions state the calculation or design work performed for each structure.
Nonlinear verification of the reinforced-concrete frame and steel beams. Strengthening was developed for slabs, the raft foundation and vertical elements; the calculations were supported during construction.
Calculation model, design documentation and working documentation. Site queries were handled during author supervision.
Selection of the structural scheme and preparation of global models for several residential buildings.
Design and working documentation for reinforced-concrete high-rise buildings and a shared podium parking structure.
Global verification of the trusses, local finite-element models of the connections and strengthening details.
Assessment of a staged scheme for stabilising building tilt. A nonlinear soil–structure interaction model with the Hardening Soil (HS) constitutive law reproduced the specified loading and unloading sequence and tracked differential settlements and tilt at each stage.
Global member verification and a local nonlinear model of the steel connection. Stress and deformation fields were considered together with component checks.
Project-specific verification of reinforcement anchorage where the available embedment did not satisfy the prescriptive development-length provisions. A local nonlinear reinforced-concrete model was used to trace force transfer through the joint, cracking, reactions and deformations over the loading history and to substantiate the adopted anchorage solution.
Pre-test deflection forecasts were prepared for the specified load programme. During full-scale loading, measured load–deflection histories from three slab sections were compared with the predicted response. The correlation was used to verify the model stiffness and the assessment basis for the tested structure.
The global reinforced-concrete model resolved the load path of the large façade cantilever, including vertical deflection, cracking-sensitive stiffness and force transfer into the back-span walls and supporting frame. The calculated deflection curve was compared with the response recorded during loading.
A complex-wide model combined the residential towers, lower-rise blocks and shared podium and foundation structure. It captured stiffness interaction between the buildings, redistribution through the common substructure and the design actions and displacements for each block.
Heat-generation kinetics and boundary heat-transfer parameters were verified against the measured temperature history of a concrete specimen. The calibrated transient model was then used to predict temperature and maturity-dependent strength development and to establish permissible early loading and formwork-stripping times, including under low ambient temperatures.
Global seismic analysis of three residential blocks over a common parking and podium structure. The transfer slab resolves non-aligned vertical elements between the towers and parking levels. Storey stiffness, drift and force redistribution at the transfer level were checked explicitly to exclude a soft-storey mechanism.
Global models for process buildings, long-span steel frames, galleries, towers, pile-supported platforms and equipment-supporting structures. Structural schemes were checked for spatial stability, load redistribution and support reactions under permanent, operational, wind and equipment actions.
Verification of the welded I-section portal frames, purlins and bracing. Linear and geometrically nonlinear analyses were used to check global response, displacements and the first buckling modes of the critical frames.
Strengthening design for the raft foundation, first-floor slab, roof slab and selected columns. Solutions included local thickenings, concrete overlays, capitals, anchorage and concrete shear keys to restore ULS and SLS compliance.
A three-dimensional ATENA model resolved materials, contact zones and reinforcement in the strengthened corner-column joint. The analysis traced force transfer between the existing and new components and reinforcement stresses up to the governing limit state.
Optimisation of a 69-storey tower over a three-level podium. Reducing wall thickness above Level 51 was checked against stiffness, dynamics and comfort; vertical reinforcement, façade beams and sensitive zones were reviewed. Slab thickness was verified for the design fire by transient heat-transfer analysis.
Preliminary modal assessment of the historic masonry minaret. Density, elastic modulus, strength, cohesion and friction ranges were assembled for the global model. The first calculated natural frequency was approximately 1.21 Hz, providing a reference for calibration against field measurements.
Review of the structural calculations and global finite-element model for the sports complex. The assessment covered the adopted structural scheme and load paths, model idealisation, boundary conditions, stiffness assumptions, load combinations and the governing ULS and SLS results.
Special analyses
A nonlinear or local model is introduced where the assumptions of a linear member check are insufficient. The report records model boundaries, load transfer, material laws and acceptance criteria.
Used where cracking, yielding, second-order response or contact changes the distribution of internal forces.
Applied after actions from the global model have been reduced to boundary conditions for the connection submodel.
Used for restrained thermal deformation and construction sequences that generate imposed actions.
Work volume
Independent portfolio data: January 2025–June 2026.
The team worked as an in-house calculation centre on design errors, construction deviations, independent checks and R&D assignments.
STC Mitra retained the calculation methodology and construction-stage experience developed by the original team.
Calculation and structural design packages can be prepared under the specified ACI, EN or SP basis of design.
Contract scope
Structural scheme, calculation model, design documentation and working documentation for reinforced-concrete and steel structures.
Checks of strength, stability and serviceability, including specified accidental or non-standard load cases.
As-built measurements, material test data and defect mapping followed by calculation-based assessment.
Verification of the actual geometry and properties, selection of remedial measures and preparation of strengthening details.
Foundation and pile models, settlement and tilt checks, and soil-foundation-superstructure interaction where required.
Review of calculation assumptions and details, model verification, R&D and non-standard analysis tasks.
Construction deviations
As-built geometry, material properties, defect records and the construction sequence.
Actual stiffness, load path, boundary conditions and the relevant construction stage.
Acceptance, local repair, compensation or strengthening with stated verification criteria.
Calculation report, drawings, execution constraints and responses to site queries.
Contracting arrangements
Independent verification of structural risk, design changes and proposed remedial measures.
Specialist calculations, local models or a complete structural design package.
Design audit, survey scope, due diligence and verification of contractor proposals.
Assessment of construction deviations and preparation of details that can be implemented on site.
Initial technical review
We will return a list of missing input data and propose the model scope, governing checks and composition of the calculation or design deliverable.
Drawings, calculation models, survey records and photographs can be attached by email to info@stc-mitra.com.
Abduzarr Zhalnin · Director, STC Mitra · Uzbekistan and international delivery