

Автор: Williams Дата: 30 сентября 2015 Просмотров: 1 467 

Ensoft LPile 2015 v8.03
LPILE is a specialpurpose program based on rational procedures for analyzing a pile under lateral loading using the py method. LPILE solves the differential equation for a beamcolumn using nonlinear lateral loadtransfer (py) curves. The program computes deflection, bending moment, shear force and soil response over the length of the pile.
As an option, components of the stiffness matrix at the pile head may be computed internally by LPILE so users can incorporate basic soilstructure interaction in their superstructure analyses. Another option from LPILE provides graphs of pilehead deflections for various pile lengths, to help users with optimum pile penetrations (for lateral response).
Nonlinear lateral loadtransfer from the foundation to the soil is modeled using py curves generated internally using published recommendations for various types of soils. Special procedures are programmed for computing py curves for layered soils and for rocks. Alternatively, the user can enter manually any other externally generated ipy curves.
Five types of pilehead boundary conditions may be selected, and the structural properties of the pile can vary as a function of depth. LPILE has analytical features to compute the nonlinear momentcurvature relationships and nominal moment capacity of a pile’s section based on specified pile dimensions and nonlinear material properties. Optionally, the user may enter nonlinear momentcurvature relationships to be used in place of the internallygenerated values. LPILE provides several design recommendations for rebar arrangements in drilled shafts. 

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Автор: Williams Дата: 4 августа 2012 Просмотров: 1 121 

Ensoft Shaft v2012.7.3 x86
SHAFT is a computer program used to evaluate the axial capacity and the shortterm, loadsettlement curves of drilled shafts or bored piles in various types of soils. In general, the majority of axial capacity methods used by SHAFT are based on the latest FHWA manual. In addition, several extra axial capacity methods are provided for clay shales, gravels, and gravelly sands.
The analytical methods employed by SHAFT are based on experimental data obtained from hundreds of wellinstrumented axial load tests of fullsized drilled shafts. Newer criteria for soil response of gravel and weak rock were modeled after papers of recent publication.
SHAFT can analyze the axial capacity and settlement behavior of drilledshafts in eight types of soil and rock models. SHAFT can accommodate any combination of soil and rock layers in a layered profile. The soils and rock models in SHAFT are the following:
 clay  cohesive geomaterial (FHWA),
 sand  cohesionless geomaterial (FHWA),
 clay  shale (Reese & Aurora),
 strong rock  using either side resistance or end bearing (FHWA),
 strong rock  using both side resistance plus end bearing (for comparison),
 decomposed rock/gravel (FHWA),
 weak rock  cohesive intermediate geomaterial (FHWA),
 gravel  cohesionless intermediate geomaterial (Rollins et al),
 gravelly sand (Rollins et al).


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Автор: Williams Дата: 31 июля 2012 Просмотров: 1 725 

Ensoft Group v8.0.14 x86
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. 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 will generate internally the nonlinear response of the soil, in the form of tz and qw curves for axial loading, in the form of py curves for lateral loading and in the form of tr 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 geometry and equilibrium of forces between the applied external loads and the reactions of each pile head.
The py, tz, qw and tr curves may be generated internally, employing recommendations in technical literature, or may be entered manually by the user. The pilehead 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 closelyspaced piles, the pilesoilpile interaction can be taken into account by introducing reduction factors for the py curves used for each single pile. As an option, the user can ask the program to generate internally some suggestions for pmultipliers to automatically reduce the soil resistance. GROUP is able to generate or lets users specify py reduction factors for two orthogonal axes.
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 commonlyaccepted 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.
GROUP v8.0 introduces 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 v8 can provide flexibility and stiffness matrices (in 2D or 3D models) for different levels of loading. 

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