2D and 3D Analysis

SAM-LEAP5 provides scope for 2D and 3D framework and finite element analysis through the same graphical user interface utilised for section and beam design. This enables seamless integration of the analysis and design modules.

A wide range of bridge decks and substructures can be modelled using; line beams, plane frames, grillages, space frames, shell finite elements and combined beam and finite elements for composite construction. Typical examples include; solid and voided slabs, composite beam and slab, box girders and cable stayed bridges.

The graphical drawing tools provided enables the easy creation of bridge decks and substructures. A facility to import structure geometry data from third party Computer Aided Design (CAD) software is also included. Sections and beams can be defined and associated with the analysis model, so that the program automatically calculates the section properties used in the analysis.

Line beam analysis is very useful for determining dead weight effects, as well as secondary effects due to shrinkage & creep and differential temperature.

A comprehensive range of advanced modelling tools is available. Some of these include;

• non-linear facilities for tension/compression only members,
• lift-off supports,
• member limiting forces(e.g. plastic hinges),
• support reaction limits (friction modelling),
• visual staged construction analysis,
• 3D post-tensioning cables, calculating losses and secondary effects.

The general loading library provides scope for representing a variety of permanent loads and live loads. Some of these include; joint loads, member point loads, uniformly distributed loads, linearly varying loads, hydrostatic loads, patch area loads, temperature loads, pre-stress loading, distortion loads, and customisable vehicular loads. Intelligent routines are available for the creation of load combinations and envelopes.

Flexible and comprehensive reporting of input data and results output both graphically and in tabular format is available. The resulting design load effects, e.g. maximum bending moments and associated shears, can be transferred directly to the beam design modules for code checking.

Vehicle Load Optimisation

For the analysis of live load effects, influence lines and surfaces can be produced for a variety of design details such as bending moments, shears, torque and reactions. This enables automatic creation of basic vehicle loads for both road and rail at the most critical locations.

The advanced vehicle optimisation facility enables the analysis of multiple influence load positions, in order to determine the most critical combination of basic loading patterns. The program automatically produces the critical vehicle positions, intensities and combinations in accordance with a variety of international design standards. This process takes a fraction of the time compared with conventional load enveloping methods.

Analysis Modules Summary

A summary of the available analysis modules is shown below. For full worked examples download the demonstration program. If you require any further information, please fill in an on-line request here or contact Bestech Systems direct.

Module	Description	British Standards	American Standards	Australian Standards	Eurocodes*
A.02	Basic 3D frame structural analysis
A.04	Advanced 3D frame, grillage and finite element analysis
A.05	Dynamic analysis: normal modes and response spectra
A.06	Line beam analysis and distribution factors
A.08	Automatic vehicle load optimiser

* - Eurocodes are currently available in a beta form.

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