CLOSED-FORM BACKCALCULATION ALGORITHM FOR INDONESIA OVERLAY DESIGN PROCEDURE

Bagus , Hario Setiadji and SUPRIYONO, SUPRIYONO (2017) CLOSED-FORM BACKCALCULATION ALGORITHM FOR INDONESIA OVERLAY DESIGN PROCEDURE. Programme of The 10th lnternational Conference on Road and Airfield Pavement Technology .

[img]
Preview
PDF (Full Paper)
94Kb
[img]
Preview
PDF (Cover)
284Kb
[img]
Preview
PDF (Table of Content)
1609Kb

Abstract

So far, condition evaluation of existing pavement by using backcalculation method in 2002 Indonesia Overlay Design Guide gives inaccurate results. To overcome this problem, another closed-form backcalculation algorithm was proposed in this study. Closed-form backcalculation algorithm developed was based on the concept of two-layer flexible pavement backcalculation with area load (named as 2L-BACK), in which the multi-layer pavement structure was simplified to a two-layer of pavement structure and the response of the pavement was developed based on uniform loading. In this study, the proposed algorithm was developed by using Nelder-Mead optimization method. For evaluating the proposed algorithm, analyses using hypothetical data and also measured data from LTPP database was conducted. Similar analyses was also conducted on two other bakcalculation methods, i.e backcalculation method in 2002 Design Guide and a best-fit trial and error backcalculation method, namely EVERCALC, for comparison. The results of the analysis showed that 2L-BACK and EVERCALC programs were insensitive in determining elastic moduli using deflection data with + 2% of measurement errors. Using data from LTPP database, it is found that 2L-BACK program can provide more accurate results than other backcalculation methods evaluated. It is recommended that 2L-BACK can be used as replacement of backcalculation procedure in 2002 Design Guide.

Item Type:Article
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Faculty of Engineering > Department of Civil Engineering
Faculty of Engineering > Department of Civil Engineering
ID Code:56970
Deposited By:Mr. Adi Widayat
Deposited On:10 Oct 2017 07:23
Last Modified:10 Oct 2017 07:23

Repository Staff Only: item control page