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These modules analyse bridge structures in order to determine the moments, shears and axial forces the components should be designed to resist. The analytical models for determining these range from simple line beams, through grillages and space frames, to finite element analysis with 3 and 4 node shell elements.
The variable action optimisation is based on influence surface technology and is fully compliant with the current loading codes.
Line beam analysis
This is a quick analysis technique used mainly for preliminary designs and for calculating the secondary effects due to differential temperature and shrinkage & creep.
Grillage Analysis
Grillage analysis is a powerful method for analysing bridge decks if finite elements are considered unnecessary. Sam allows the main beams to be offset from the plane of the grillage, offering greater accuracy.
Finite Element Analysis
Sam has shell finite element capability. This is very useful for the design of decks made up from steel/concrete composite beams, as well as for general box girder analysis.
Traffic Load Optimisation
Sam's unique implementation of traffic load optimisation makes it a World leader. It gives the Engineer the ability to automatically generate traffic loads accurately and rapidly in accordance with modern design codes.
Dynamic Analysis
Sam performs dynamic analysis for normal modes with automated generation of mass. Animated mode shapes assist interpretation of dynamic response.
Many tools exist in the analysis modules to rapidly model the required structure. However, CAD models can also be interacted with to save time and increase efficiency.
Once results of load cases and load compilations have been obtained they can be enveloped, and the envelopes for similar beams can themselves be enveloped. The final results can then easily be transferred back to the original beam file for design code checking.
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Developing a grillage model in Sam.
Optimised road traffic loads created using Sam.
Examining the results of a four span grillage analysis.
Examining the results of a four span grillage analysis.
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