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GROUP v2014

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  • GROUP v2014

GROUP v2014

SKU# GROUP v2014
Excl. GST: RM 8,088.00 Incl. GST: RM 8,573.28
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Product Description

GENERAL DESCRIPTION

New GROUP v2014 features in this color

New GROUP v2013 features in this color




GROUP has been well accepted as an useful design tool for analyzing the behavior of piles in a group subjected to both axial and lateral loadings. The program was developed to compute the distribution of loads (vertical, lateral, and overturning moment in up to three orthogonal axes) applied from any multiple locations in the pile cap to piles arranged in a group. A new feature for user-specified displacements and rotations (in 3D) from GROUP v2014 resolves the forces that are generated with such movements/rotations.



The piles may be installed vertically or on a batter and their heads may be fixed, pinned, or elastically restrained by the pile cap. The pile cap may settle, translate, and/or rotate and is assumed to act as a rigid body.



The program generates internally the nonlinear response of the soil, in the form of t-z and q-w curves for axial loading, in the form of p-y curves for lateral loading and in the form of t-r curves for torsional loading. A solution requires iteration to accommodate the nonlinear response of each pile in the group model. Program GROUP solves the nonlinear response of each pile under combined loadings and assures compatibility of deformations and equilibrium of forces between the applied external loads and the reactions of each pile head.



The p-y, t-z, q-w and t-r curves may be generated internally, employing recommendations in technical literature, or may be entered manually by the user. The pile-head forces and movements are introduced into equations that yield the behavior of the pile group in a global coordinate system. The program can internally compute the deflection, bending moment, shear, and soil resistance as a function of depth for each pile.




For closely-spaced piles, the pile-soil-pile interaction (GROUP Effects) can be taken into account by introducing reduction factors for the p-y curves used for each single pile. As an option, the user can ask the program to generate internally some suggestions for p-multipliers to automatically reduce the soil resistance. GROUP is able to generate or lets users specify p-y reduction factors for two orthogonal axes. In GROUP v2014 the user may enter p-y modification factors that can vary along the length of each pile in the model.



The program allows the user to select computations of the required unit side friction at the top and bottom of each soil layer along with a unit tip resistance. The program employs commonly-accepted equations to compute internally the estimated unit side friction and unit tip resistance based on the soil properties that are specified by the user for each soil layer.



Users can also input external nonlinear curves of axial load versus settlement for each pile in the group. Those external curves can be obtained by the user based on load tests or using the Ensoft programs APILE and/or SHAFT.



Amongst several new features, with GROUP v2014 the foundation stiffness can be generated based on equivalent elastic stiffness (thus generating a symmetric stiffness matrix). Users of GROUP v2014 are also able to select to print out a text file (response file) with equivalent nonlinear springs along the pile, which is useful for performance of complete soil-structure interaction analyses using other structural software.



The previous GROUP v8.0 introduced several enhancements: Use of multiple load cases representing concentrated loads at the pile cap and/or distributed lateral load at the piles; Concentrated loads at the pile cap may be defined at any position; Distributed lateral loads at the piles can be defined by local or global axes; Load combinations can be specified by the user and are set by load factors applied at the defined load cases; Maximum and minimum envelopes may be computed for both load cases and load combinations; GROUP can provide flexibility and stiffness matrices (in 2D or 3D models) for different levels of loading.


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