Determination of layer modulus master curve for steel deck. Pavement calculator pavement design calculator software. Precision of backcalculation analysis and independent. Pavers premium pavement design software with powerful. The noise in insitu measured asphalt pavement deflection basin is the primary cause for the difference between the theoretical deflection basin in backcalculating software and measured basin, which affects the accuracy of the modulus backcalculation.
Calme is a me design program for flexible pavements that parallels the nchrp 7a mepdg and is calibrated for california conditions. Aashtoware pavement me design is a productionready software tool to support the daytoday operations of. Backcalculation of pavement structure characterization results author. A sophisticated software available for research groups for analysis of complex pavement interactions. It is built upon the nchrp mechanisticempirical pavement design guide. Analysis software for our global fwd products jils in california. Backcalculation is a mechanistic evaluation of pavement surface deflection basins generated by various pavement deflection devices. It should be understood that many different software packages can be used to calculate the elastic modulus of pavement layers and subgrade soils from deflection basins, as demonstrated in report fhward97086, back calculation of layer moduli of ltpp gps sites. Falling weight deflectomewter is a apparatus used for pavement evaluation civil engineering. Rubicon toolbox is a suite of tools that can greatly increase the productivity of engineers involved with pavement rehabilitation design. The following programs can be downloaded and be used by students in ce475 or ce575 for. Pavement properties are backcalculated from the observed dynamic response of the pavement surface to an impulse load the falling weight.
Available software include faarfield, comfaa, compsys, and other programs. Evaporation rate calculator for ios free download and. Bakfaa is a program that performs back calculation of pavement layer modulus values using the faa layered elastic analysis program leaf and a downhill multidimensional simplex minimization method. Precision of backcalculation analysis and independent parametersbased models in estimating the pavement layers modulusfield and experimental study. Daps deflection analysis of pavement structures abatech. Pavement design overlay design reconstruction pavement design module of esurvey civil tools helps you to compute the thickness of various pavement compositions in both overlay design projects and reconstruction projects. Can someone suggest the software for back calculation of. The use of the backcalculation software in a batch mode for evaluating and analyzing deflection measurements from the ltpp database is an. In this paper, a tsdspecific backcalculation procedure is presented. Backcalculation of layer parameters for ltpp test sections, volume ii. The tonn program may be downloaded from the pavement design software webpage. Can someone suggest the software for back calculation of falling.
Using deflection data and other pertinent information obtained from shrp pavement test sections, the selected software was exercised by a group of evaluators which included the program developers. The software is written using modern windows programming languages with this version being developed for the windows 98 operating system. You can obtain information on how to obtain your own copy from the american concrete pavement association acpa web site. This is a proprietary aashtoware computer software product. Calback is a sophisticated backcalculation program that contains specific features pertinent to california and is designed to work standalone, or in concert with calme. One of the more common methods for analysis of deflection data is to backcalculate the elastic properties for each layer and provide the elastic layer modulus that are typically used for pavement evaluation and rehabilitation design. Utilizing the latest research provided by the heavy vehicle simulator and based on 35 years of worldwide consultancy experience, elmod is unparalleled at modeling pavement. Visual lighting software in addition to our light fixtures, controls and daylighting solutions, acuity brands is dedicated to delivering a complete set of complementary, innovative lighting design software tools to deliver highly efficient, sustainable design methods and product applications. Falling weight deflectomewter is a apparatus used for pavement evaluation. Deflection analysis of pavement structures for fwd data. The temps model is a unique software and can have numerous applications in pavement engineering. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Can someone suggest the software for back calculation of falling weight deflectometer. The pcn module is used to rate the strength of airport pavements based on results from the elmod backcalculation procedure.
A 2001 study suggests fix ing these issues by standardizing file formats among manu facturers, allowing data analysis software to vary test site stationing, and allowing quality controls such as the slic transform, nondecreasing deflections, and overflow checks schmalzer 2001. The intention is to integrate games as the basic engine for forward and backcalculation in road pavement design and analysis in. Alizelcpc software for pavement structures analysis and design, roads, airfield pavements, port and logistic platforms, new projects, rehabilitation, deflexions analysis alizelcpc the professional software for design of pavement structures. Based on the backcalculation results, the master curves for the layer moduli of. Eliback for rigid pavement, and issem4, modcomp3, modulus and wdef for flexible pavements. Evaluating falling weight deflectometer backcalculation. Stand alone software version of the pavement design portion of the ce calc website. Index backcalculation of layer parameters for ltpp test. Pavement analysis and design software pads based on the south african mechanisticempirical design method. Pavement design free pavement design software download. Civil engineering pavement design calculation software covers calculations for traffic, road geometry, surveying, earthwork, asphalt pavement, concrete pavement, concrete floors on grade and unit conversions. Backcalculation of pavement structure characterization results.
Pavement modeling is based on roughness, friction, pavement distress, as well as the structural analysis. The procedure is based on a layered linear viscoelastic pavement model and takes the driving speed of the vehicle into account. Pavement analysis and design software pads based on the. Introduction software of software through benchmarking. Secondly, a finite element model of the bridgepavement system was established to backcalculate the layer moduli of the field osd pavement from the measured strain data. Any license for the pavement me software can download the bct. Pavement design software free download pavement design. Pavement cost calculator sheet xls civil engineering program. In some backcalculation programs, a range minimum and maximum of moduli are selected or calculated to prevent program convergence to unreasonable. The iowa department of transportation dot has been collecting falling weight deflectometer fwd data on a regular basis. Falling weight deflectometer fwd mndot pavement design. Reevaluation of the aashtoflexible pavement design. The main advantage of the suggested method is to backcalculate the pavement layer modulus using.
The pavement me deflection data analysis and backcalculation tools is a standalone. To alleviate this limitation, this paper focuses on the recent development of a systematic backcalculation protocol for subgrade resilient modulus using modcomp6 software. Therefore, we carried out the research on developing software to counter this problem, using the visual. For instance, accurate prediction of pavement temperatures, over time and with depth, is critical particularly in mechanistic modeling of thermal cracking.
Introduction pavement structures provide a vital part. Bakfaa is the faa software to perform backcalculation of pavement material. The disadvantage of the fwd method is that its results are often dependent on such factors as the particular model of tester used, the specific testing procedure, and the method of backcalculation. It calculates pavement responses stresses, strains, and deflections and combines them with other pavement, traffic, climate, and materials parameters to predict the progression of key pavement. Backcalculation takes a measured surface deflection and attempts to match it to within some tolerable error with a calculated surface deflection generated from an identical pavement structure using. Pavement cost calculator sheet xls web share 201607. More accurate modulus backcalculation by reducing noise. Pavers software for backcalculating fwd deflections, determine airport pavement loadcarrying capacity acnpcn, for analytical design of roads, industrial and airport pavements, assess remaining structural pavement life and optimise maintenance. Design pamphlet for the backcalculation of pavement layer moduli in support of the 1993 aashto guide for the design of pavement. Pavement design software free download pavement design top 4 download offers free software downloads for windows, mac, ios and android computers and mobile devices. Software development pakpave for flexible pavement design. Performs civil engineering calculations for trafficroad geometry, surveyingearthwork, pavement, concrete floors and unit c download transportation engineering software pavement calculator 2. Advanced tools such as monte carlo simulation and finite elements can enhance the depth and scope of pavement analysis and design calculations. The acnpcn system of rating airport pavements strength is designated by the international civil aviation organization icao as the only approved method for reporting the strength of a pavement.
Iowas intelligent pavement backcalculation software. Airport design software supports pavement design and pay reductions for airport pavement projects. In recent years, software has been developed to calculate aircraft pavement strength ratings from modulus values that are backcalculated from deflections measured by a falling weight deflectometer. Abatechs software for backanalysis of fwd deflection data collected from various types of falling weight deflectometers. Aashtoware pavement me design is a productionready software tool to support the daytoday operations of public and private pavement engineers. The backcalculation is a userdependent procedure and produces a nonunique resilient modulus estimation. You can download it in the federal aviation administration faa website. Bituminous testing spreadsheet version 2, xlsm 400 kb if you have data in a version 1 spreadsheet and would like it updated to version 2, contact bruce. The lcca module allows the user to compare multiple rehabilitation scenarios over a 2025 year period.
This is in contrast to most existing backcalculation procedures, which treat the problem as static and the pavement as purely elastic. Systematic backcalculation protocol and prediction of. Software for designing pavement overlayreconstruction. Daps deflection analysis of pavement structures is a rapid, accurate and reliable method for performing back calculation of deflection results. Can anyone help me to get the mepdg software for pavement. The existing aashto flexible pavement design equation does not currently predict the pavement performance of the strategic highway research program long term pavement performance studies test sections very accurately, and typically overestimates the number of equivalent single axle loads needed to cause a measured loss of the present.