Grl engineers perform grlweap wave equation analysis to find the relationship between bearing capacity, pile stress and blow count, known as the bearing graph. The wave equation is a linear secondorder partial differential equation which describes the propagation of oscillations at a fixed speed in some quantity y y y a solution to the wave equation in two dimensions propagating over a fixed region 1. Mar 20, 2020 ralph nelson elliott developed the elliott wave theory in the 1930s. Grlweap predicts driving stresses, hammer performance and the relation between pile bearing capacity and net set per blow. Capwap geotechnical design software deep foundation. Find details on our wave equation analyses grlweap and drivability studies to determine predicted bearing capacity. Wave equation analysis is a numerical method of analysis for the behavior of driven foundation piles. It is for this reason that the wave equation analysis features should be. While every effort will be made to insure its accuracy, this information should not. Later after conversion as a pc software it was renamed grlweap and is now.
Nonlinear wave equations wolfram demonstrations project. Most forex traders base their decisions on technical analysis. The socalled earthquake wave equation analysis for piles eqweap procedure is introduced for piles subjected to horizontal earthquake excitations. The elliott wave analysis forex includes two different wave patterns, which include the five wave pattern, as well as the three wave pattern. Warrington who maintains an excellent site regarding pile driving analysis by the wave equation a must read for serious practitioners. It permits a solution in the form of adiverging spherical wave. Pdf a new type of wave equation analysis program researchgate. You can also do a drivability of the pile as it penetrates the soil. Elliott believed that stock markets, generally thought to behave in a somewhat random and chaotic manner, in fact, traded in. Don also has written an excellent paper regarding a closed form solution to limited cases for the wave equation. Pile driving simulation software of choice worldwide for pile driving professionals.
Grlweap predicts driving stresses, hammer performance and the relation. This section presents a range of wave equation models for different physical phenomena. Capwap case pile wave analysis program is a software program that estimates total bearing capacity of a pile or shaft, as well as resistance distribution along the shaft and at the toe. The grlweap software simulates pile driving prior to actual pile installation using the wave equation numerical analysis technique. The model mathematically represents the pile driving hammer and all its accessories ram, cap, and cap block, as well as the pile, as a series of lumped masses and springs in a onedimensional. This type of analysis identifies market patterns and trends based on complex mathematical equations, which are combined and placed into the form of a certain indicator.
A wave equation analysis should be performed prior to pile driving as a guide to select properly sized driving equipment and piles to ensure that the piles can be driven to final grade without exceeding the allowable pile. The wave equation is quite often used as an aid in design. To indicate the static resistance to penetration of the pile afforded by the soil at the time of driving. Nondirectional and directional wave data analysis procedures. Wave equation analysis foundation engineering engtips. Wave equation analysis by pile driving software aimil.
The wave equation governs a wide range of phenomena, including gravitational waves, light waves, sound waves, and even the oscillations of strings in string theory. The five wave pattern can be found with five different dominant waves, which include wave 1, wave 2, wave 3, wave 4, as well as wave 5. Grlweap wave equation analysis dynamic pile testing sdn bhd. The video for analysis is included with the lab book. For example, the air column of a clarinet or organ pipe can be modeled using the onedimensional wave equation by substituting airpressure deviation for string displacement, and longitudinal volume velocity for transverse string velocity. Oct 28, 2014 an introduction or a refresher to the grlweap software for pile driving simulation and analysis. Grlweap wave equation analysis of pile driving pile dynamics. It arises in fields like acoustics, electromagnetics, and fluid dynamics. Ndbcs methods for analysis of nondirectional and directional wave data have been described over many years in papers published in the refereed literature, papers presented at professional society meetings, reports. Find details on our wave equation analyses grlweap and drivability. Wave equation analysis of pile driving, with spile.
A portion of the webinar is devoted to the theory of wave equation. Ralph nelson elliott developed the elliott wave theory in the 1930s. Calculates soil resistance, dynamic pile stresses, and estimated capacities based on field observed blow count, for a given hammer and pile. Wave equation analysis of pile driving construction weap. Grlweap predicts driving stresses, hammer performance and. Penetration depth driving stresses vs penetration depth.
Software tagged with wave equation analysis total items found. Smith in the 1950s, the wave equation analysis of pile driving has. The idealstring wave equation applies to any perfectly elastic medium which is displaced along one dimension. Up to about 1987, the weap wave equation analysis program was sponsored by fhwa and available to the public. A wave equation analysis is recommended, except for the simplest projects when adequate experience and data already exist, for estimating the behavior of pile driving and confirming pile performance. We will now exploit this to perform fourier analysis on the. Grlweap wave equation analysis by grl engineers youtube. All of the information, data and computer software. The ordinary wave equation is linear, and always shows fairly simple behavior. The wave equation analysis takes the given blow count from pile installation logs and the bearing graph yields the predicted bearing capacity. A wave equation analysis should be performed prior to pile driving as a guide to select properly sized driving equipment and piles to ensure that the piles can be driven to final grade without exceeding the allowable pile driving stresses. Jan 29, 20 grlweap is a onedimensional wave equation analysis program that simulates the pile response to pile driving equipment. Powerful options combine the basic analysis of one hammer blow into the simulation of a complete pile driving process. Explore the shape of a transverse wave pulse and how it moves along a spring lying on a smooth floor.
Wolframs equation, on the other hand, appears to have no such simplifying features, and can exhibit highly complex behavior. Statistically, the ratio of predicted static capacity to actual capacity as determined by a static load test and using the. Features of grlweap version 2010 and grlweap offshore wave will be, presented, explained and demonstrated. Introductory level examples will be presented during the first sessions, while more advanced situations will be discussed in the final sessions. Allin3, and david rancman4 abstract since its introduction by e. Since then, many significant parameters affecting pile driving have been included in. Today the grlweap software is recognized by many specifying agencies as the most reliable predictor of dynamic pile driving stresses, hammer performance, and either blow count or bearing capacity of an impact driven pile. Pdf this paper describes a new wave equation analysis program.
It is the most reliable predictor of pile driving stresses, hammer performance, and set per blow versus bearing capacity of a driven pile. Onedimensional wave equation analyses for pile responses. Grlweap is a onedimensional wave equation analysis program that. Grlweap wave equation analysis of pile driving pile. It predicts the pile capacity versus blow count relationship and pile driving stress. Grl engineers are experts in the use of this software program, allowing them to provide analysis results quickly. Grlweap is the software of choice for industryleading piling professionals around the world. Grl engineers perform grlweap wave equation analysis to find the relationship between bearing capacity, pile stress and blow count. This paper describes a new wave equation analysis program called zwave, which is a program specifically for external combustion hammers. Don also has written an excellent paper regarding a closed form solution to.
Wave equation analysis program how is wave equation. The sinegordon equation is nonlinear, but is still special in having solitons, and again exhibits fairly simple behavior. Weap, wave equation analysis of pile driving and successor programs such as grlweap by grl engineers, inc. Mtpredictor is different from other software our unique isolation approach to elliott wave see definitions avoids the usual confusion of conflicting patterns and timeframes. Note that the wave equation only predicts the resistance to penetration at the time of. Sep 15, 2016 wave equation analysis is a numerical method of analysis for the behavior of driven foundation piles. Chapter 4 the wave equation another classical example of a hyperbolic pde is a wave equation. The program inputs the force and velocity data obtained with a pile driving analyzer pda system to perform a soil resistance test. Pdf this paper describes a new wave equation analysis program called zwave, which is a program specifically for external combustion. The routine listed below solves the 1d wave equation using the cranknicholson scheme discussed above. It predicts the pile capacity versus blow count relationship bearing graph and pile driving stress. The wave equation is one of the fundamental equations of mathematical physics and is applied extensively.
Using computer to solve the wave equation was discussed by smith in asce journal for soil mechanics and foundation engineering, vol 86, sm4, pp 3561, 1960. This analysis may be accomplished using program grlweap goble et al. Static geotechnical analysis tools, residual stress analysis, flexible drivability analysis, grlweap is a one dimensional wave equation analysis program. Ndbcs wave data analysis procedures in a single publication for users of ndbcs wave data and results based on these data. The wave equation is an important secondorder linear partial differential equation for the description of wavesas they occur in classical physicssuch as mechanical waves e.
This work shall consist of conducting wave equation analysis of piles weap at each substructure or location specified on the contract plans, using the latest version of the weap software program. Smith 1960 proposed a numerical solution for wave propagation in an elastic pile using a finite difference scheme, with lumped mass representation and simple rheological laws for pilesoil interaction. Wolframs equation, on the other hand, appears to have no such simplifying. Wave equation article about wave equation by the free. Depending on the medium and type of wave, the velocity v v v can mean many different things, e. Modified equation and amplification factor are the same as original laxwendroff method. Wave equation analysis of pile foundations march 1986 weap86. The routine first fourier transforms and, takes a timestep using eqs. Commercial software packages such as allwavepdp and grlweap are now available to perform the analysis.
It and its successors have since become the most commonly used wave equation program for the analysis of driven piles during driving. Capwap case pile wave analysis program pile dynamics, inc. Wave equation applications develop driving criterion blow count for a required ultimate capacity blow count for capacity as a function of energy stroke refined matching analysis adjust input parameters to fit dynamic measurements check driveability blow count vs. Applications and correlations of the wave equation analysis program grlweap frank rausche1, liqun liang2, ryan c. Capwap case pile wave analysis program is a software program that estimates total bearing capacity of a pile or shaft, as well as resistance distribution.
Wave equation analysis of piles has seen many improvements since the 1950s such as including a thermodynamic diesel hammer model and residual stress. The program takes as input the force and velocity data obtained with. Grlweap is a onedimensional wave equation analysis program that simulates the pile response to pile driving equipment. Statistically, the ratio of predicted static capacity to actual capacity as determined by a st. The analyses assumptions and driving recommendation shall be.
This experiment uses logger pro software for video analysis. We present here weap87, the last freely released version of the program. Statistically, wave equation analysis of piles weap performs better than the enr formula at estimating the capacity of a driven pile. Capwap case pile wave analysis program pile dynamics. The wave equation is a secondorder linear hyperbolic pde that describesthe propagation of a variety of waves, such as sound or water waves. Although many wave motion problems in physics can be modeled by the standard linear wave equation, or a similar formulation with a system of. If u is a function of only two one spatial variables, then the wave equation is simplified and is called a twodimensional onedimensional equation. When applied to linear wave equation, twostep laxwendroff method. Mtpredictors elliott wave software will help you identify low riskhigh return trades quickly and easily helping you to maximise your profits and cut your losses. Introductory level examples will be presented during the first sessions, while more advanced situations will be. This paper presents a numerical onedimensional wave equation analysis technique for piles and pile groups subjected to seismic horizontal ground motions in liquefiable zones. Participants will be eligible for a 10% discount on grlweap 2010 license or grlweap license update to 2010. Although many wave motion problems in physics can be modeled by the standard linear wave equation, or a similar formulation with a system of firstorder equations, there are some exceptions. Wave equation analysis of pile driving weap program.