LPILE MANUAL PDF

LPILE Manual – Lpile is a special purpose program that can analyze a pile or drilled shaft under lateral loading. The program computes. User’s Manual for LPile (Using Data Format Version 9). A Program to Analyze Deep Foundations Under Lateral Loading. by. William M. Isenhower, Ph. D. User’s Manual forLPile, Version 6 A Program for the Analysis of Deep Foundations Under Lateral Loading.

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FORUM8 will distribute them. Product overview is as following. LPILE Plus is a special-purpose program based on rational procedures for analyzing a pile under lateral loading. The program computes deflection, shear, bending moment, and soil manula with respect to depth in nonlinear soils.

Components of the stiffness matrix at the pile head may be computed internally by the program to help the users in their super-structure analysis. Several pile lengths may be automatically checked by the program in order to help the user produce a design with an optimum pile penetration.

Soil behavior is modeled with p-y curves internally generated by the computer program following published recommendations for various types of soils; alternatively, the user can manually lpike other p-y curves.

LPILE Plus for Windows: Technical Manual by Lymon C. Reese | LibraryThing

Special procedures are programmed for developing p-y curves for layered soils and for rocks. Several types of pile-head boundary conditions may be selected, and the properties of the pile can janual vary as a function of depth.

LPILE Plus has capabilities to compute the ultimate-moment capacity of a pile’s section and can provide design information for rebar arrangement. Depending on boundary conditions, pile-head loading may consist of a lateral load, a bending moment, a specific lateral displacement, or a specific pile-head rotation.

The user may optionally ask the program to generate and take into account nonlinear values of flexural stiffness EI.

Version 5 allows the user to define multiple sections with nonlinear bending properties. This new feature enables the designer to quickly evaluate the benefits for reducing part of the reinforcing steel in the lower sections of a drilled shaft, as is common used in practice. Up to ten different load cases may be applied at the pile head in a single analytical run. This is a helpful feature for the quick observation of pile behavior subjected to specific increments of lateral loads, bending moments, lateral displacements, or pile-head manuaal.

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A set of distributed lateral loading may be applied anywhere along the length of the pile. Loading may be specified as constant or varying linearly with depth. Values are helpful as nonlinear foundation models in superstructure analysis.

LPILE Plus has the capability to perform push-over analyses and can study the pile behavior after the development of plastic hinges yielding. Several pile lengths can be automatically checked by the LPILE Plus program in order to help the user produce a design with an optimum pile penetration. Soil-resistance p-y curves can be internally generated by the program for the following soils: The p-y curves may be printed at any depth for reviews or reference. Users may optionally input their own soil-resistance p-y curves for certain soil depths.

LPILE Manual

A special subroutine effectively incorporates manuall influence of layered soils. User-defined multipliers are provided to increase or reduce the soil resistance p-y curves at any points along the length of the pile. This feature is used in seismic conditions to reduce the response of liquefied layers or to account for Group Effects. Linear interpolation of bending stiffness is computed for piles with varying cross sections.

The Graphics menu contains quick observations of results contained in the output file variations of pile deflection, bending moment, shear and soil resistance with pile depth. The user can customized charts to prepare various engineering plots in high quality for presentation and report. A Program for the Analysis of Pile in a Group GROUP has been well accepted as a valuable design tool for analyzing the behavior of pile in a group subjected to both axial and lateral loadings.

The program computes the distribution of loads combination of vertical, lateral, and overturning moment in up to three orthogonal axes from 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 program wil generate internally the nonlinear response of the soil, in the form of t-z and q-q curves for axial loading, in the form of p-y curves for lateral loading.

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The p-y, t-z q-w and t-r curves may be generated internally ,emplyoing recommnendations 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 grobal coordinate system. The program can internally compute the deflection, bending moment, shear, and soil resistance as a function of depth for each pile.

This program can provide data for evaluating the pile-cap stiffness, often used by structural engineers for foundation simulation in their numerical models.

The graphical observation of output curves features a new interface that allows zooming of areas of ,pile interest. The user may thus observe the detailed behavioral measurements of any portion of the depth of each pile sub-group.

More importantly, the program plots the force and displacement on the pile cap, such as the axial force tension and compression of each pile on the pile cap, llateral forces shear and moment of each pile on the pile cap, and the displacement of the pile cap in different directions. The program allows for up to piles in a group, and each pile can have diffrent EI values in orthogonal directions.

The program will consider the nonlinear bending stiffness EI of each pile during computation. The user can enter nonlinear moment-curvature curves under different axial loads for each pile.