Structural scheme

Job ID: 40540418

Budget: $30 – $250 USD

Technical Scope of Work – Structural Modelling and Analysis in Autodesk Robot Structural Analysis

Project Overview

The project consists of the structural modelling, analysis, and verification of a new independent internal structural system to be constructed within an existing building undergoing rehabilitation.

The purpose of the model is to provide all the structural calculations and documentation required for the Structural System & Analysis section of the project.



1. Existing Building

The existing building structure will be preserved as part of the rehabilitation project.

The original structural system (existing columns, walls, beams, roof, etc.) is not part of the new structural design and should not be considered as the primary load-bearing system for the new intervention, except where its geometry influences the layout or where local connections need to be represented.

The existing structure should therefore be considered as an existing architectural constraint rather than a structural system to be designed.



2. New Structural Intervention

Inside the existing building, a completely new independent structural frame will be constructed.

This new structure must be capable of carrying all its own loads and transferring them safely to the foundations without relying on the existing structure.

The proposed structural system is relatively simple and consists mainly of:

* Steel or reinforced concrete columns (depending on the adopted solution).
* Primary and secondary beams.
* Floor system supporting an intermediate mezzanine level.
* Roof supporting members where required.
* Local bracing or stability elements if necessary.
* Structural connections between the new members.

The project also includes a mezzanine floor, which must be incorporated into the structural model.



3. Building Use

The building has a mixed-use program consisting of two main functional areas:

* Horse training facilities.
* Police operational and administrative facilities.

Because of these different occupancies, different imposed loads must be assigned according to the applicable structural design code.

The engineer should identify and apply the appropriate live loads for each functional area.



4. Structural Model in Autodesk Robot

A complete three-dimensional analytical model shall be developed using Autodesk Robot Structural Analysis.

The model should include:

* Structural grids and levels.
* Complete geometry of the new structure.
* Member connectivity.
* Material properties.
* Cross-sections for all structural members.
* Boundary conditions.
* Support conditions.
* Releases where applicable.
* Member eccentricities if required.
* Load cases.
* Load combinations.
* Analysis settings.

The model must be fully functional for structural analysis and not only represent a geometric model.



5. Structural Actions

The following actions shall be considered where applicable:

Permanent Loads (Dead Loads)

* Self-weight (generated automatically).
* Floor finishes.
* Roofing.
* Partitions.
* Services.
* Cladding.
* Permanent architectural elements.

Variable Loads (Live Loads)

According to the building use:

* Horse training areas.
* Office spaces.
* Police facilities.
* Circulation areas.
* Mezzanine floor.

Environmental Actions

Where required by the applicable code:

* Wind loads.
* Horizontal stability effects.
* Any additional accidental actions if relevant.



6. Preliminary Structural Design

Before the final analysis, a preliminary sizing of the structural members shall be carried out.

This should include:

* Initial column sizes.
* Beam sections.
* Floor thickness or structural system.
* Structural spans.
* Approximate load paths.
* Structural layout.
* Initial verification of member proportions.

The objective is to establish a structurally reasonable starting point before performing the final calculations.



7. Structural Analysis

The structural analysis shall determine, at minimum:

* Axial forces.
* Shear forces.
* Bending moments.
* Torsional moments where applicable.
* Support reactions.
* Vertical displacements.
* Horizontal displacements.
* Global deformed shape.
* Internal force diagrams.

Screenshots of the analytical model and the principal results should be provided.



8. Ultimate Limit State (ULS) Verification

The main structural members shall be checked under Ultimate Limit State combinations.

The verification should demonstrate adequate resistance against:

* Axial compression.
* Axial tension.
* Flexure.
* Shear.
* Combined axial force and bending.
* Member buckling.
* Global structural stability.
* Utilization ratios of the primary structural members.

The governing load combinations should be identified.



9. Serviceability Limit State (SLS) Verification

Serviceability checks shall include, where applicable:

* Vertical deflections.
* Horizontal displacements.
* Mezzanine floor deflections.
* Beam deflections.
* Floor serviceability.
* Overall structural stiffness.
* Verification that displacements remain within acceptable code limits.

Where relevant, any serviceability issues affecting finishes or compatibility with the existing building should also be identified.



10. Structural Drawings

The deliverables shall include:

General Structural Drawings (Scale approximately 1:200)

Showing:

* Structural grids.
* Columns.
* Beams.
* Mezzanine.
* Structural layout.
* Main dimensions.

Structural Details (Scale approximately 1:20)

Including:

* Beam-to-column connections.
* Column base details.
* Main structural joints.
* Typical framing details.
* Significant structural connections.



11. Required Deliverables

The final package should include:

* General structural plans (1:200).
* Structural system description.
* Estimation of structural actions.
* Structural load assumptions.
* Preliminary sizing sheets.
* Autodesk Robot analytical model.
* Screenshots of the structural model.
* Load cases and load combinations.
* Internal force diagrams.
* Deformation plots.
* Support reactions.
* Ultimate Limit State (ULS) verification.
* Serviceability Limit State (SLS) verification.
* Final member schedules.
* Structural detailing of the principal elements and connections (1:20).



12. Design Philosophy

The key design principle of this project is that the new internal structural system must behave independently from the existing building structure.

The analytical model should clearly demonstrate:

* The new structural load path.
* Independent load transfer to the foundations.
* Structural stability of the new frame.
* Compatibility with the existing building geometry.
* Appropriate structural connections where interaction with the existing building is unavoidable.

The existing structure is considered an existing constraint and should not be relied upon as the primary load-bearing system for the new intervention unless explicitly justified.



Final Objective

The objective is to produce a complete Autodesk Robot Structural Analysis model that provides sufficient technical documentation to support the Structural System & Analysis section of the project, including structural modelling, preliminary member sizing, structural calculations, ULS and SLS verification, and the corresponding structural drawings and details.