Geotechnical Engineering Modelling Software Suite (GEMS Suite) deals with finite element analysis of beam foundations.

Geotechnical engineering analysis is based on modelling the subsoil material and the interacting structure. The modelling parameters which characterise the behaviour of subsoil are obtained from geotechnical investigations.

Subgrade reaction theory based on discrete spring model

The analysis of the foundation beam is based on the solution of the differential equation


where k=k_s×B, EI=Flexural rigidity of foundation beam,

k_s=Modulus of subgrade reaction, B=width of foundation beam. The foundation base is assumed to be smooth and the soil pressure is assumed uniform across the width. The solution of this differential equation is complicated and cumbersome except for very simple problems. For practical problems where the loads are in the form of several concentrated loads, moments and UD loads it becomes necessary to resort to numerical solutions. The software module uses finite element solution of the problem using the exact displacement function and therefore gives exact solution to the problem.

Elastic half-space model


In this approach the subsoil is modelled by a homogeneous, isotropic elastic half-space characterised by an elastic modulus and a Poisson ratio. This model has the merit of accounting for the continuous nature of the soil medium. The discrete spring bed model does not account for the soil continuity. The solution is based on the vertical displacement due to a distributed surface loading on an elastic half-space (given by “Boussinesq”). Again numerical solution of the problem is essential for tackling practical problems as no analytical solution is available for finite beams. The software module for Elastic half-space model is based on finite element formulation assuming a smooth base and uniform soil pressure across the width.










One Click Computation

One click computation and analysis for all load cases and models.





Analysis Models

Analysis of the beam foundation using both/either models.





Load Cases

Multiple load cases could be considered.

Beam Diagram

Graphical representation of the Plan and Elevation View of the beam foundation.

Loading Diagrams

Graphical representation of loading diagrams for each load case.

Unit System

Data can be input in either SI units or ‘Commonly used American units’ (Kips for force and foot for length).

Export

Export results to Microsoft Word & Excel

Loads & Moments

The loading may consist of several concentrated loads & moments.

Uniform Loads

Multiple uniformly distributed loads can be specified.

Beam Weight

Self-weight of the beam may be included if required.

Beam Dimensions

Different depths and breadths could be given for the beam. RCC inverted T beam sections and RSJ s could be considered by prescribing EI values directly.

Prescribed Displacements & Rotations

Vertical displacements and rotations could be prescribed if required.

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