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Title:

Closed-Form Backcalculation of Rigid-Pavement Parameters Using Barycentric Horizontal Distance of Deflection Basin
Cover of Closed-Form Backcalculation of Rigid-Pavement Parameters Using Barycentric Horizontal Distance of Deflection Basin

Accession Number:

01626225

Record Type:

Component

Abstract:

This paper presents a solution of back-calculation analysis of rigid-pavement parameters using the barycentric horizontal distance of deflection basin, called HD-BACK. The HD-BACK adopted simplified calculations and leads to easy application, in which the deflection information of each sensor of FWD (Falling Weight Deflectometer) is used, and the principle of back-calculation is to minimize the sum of the squared errors of the measured deflection basin. The closed-form solution procedure of the HD-BACK is proposed and a corresponding numerical calculation MATLAB program is developed for this purpose. Comprehensive comparison is conducted among the presented method and two widely used closed-form back-calculations called ILLI-BACK and NUS-BACK, respectively. The sensitivity, robustness and efficiency of the compared three methods are first analyzed using a numerical example, and subsequently, the proposed method is validated with the field measured deflections by FWD as inputs, where the squared errors between the field measured and back-calculated deflections are investigated. The results show that the proposed HD-BACK has the great potential in back-calculation of rigid-pavement parameters, with the lower sensitivity and the lower fitting error to the measured deflection.

Supplemental Notes:

This paper was sponsored by TRB committee AFD80 Standing Committee on Pavement Structural Modeling and Evaluation. Alternate title: Closed-Form Back-Calculation of Rigid-Pavement Parameters Using Barycentric Horizontal Distance of Deflection Basin.

Monograph Accession #:

01618707

Report/Paper Numbers:

17-05715

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Liu, Shifu
Ling, Jianming
Yang, Wenchen
Yuan, Jie
Zhang, Jiake

Pagination:

17p

Publication Date:

2017

Conference:

Transportation Research Board 96th Annual Meeting

Location: Washington DC, United States
Date: 2017-1-8 to 2017-1-12
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Highways; Pavements

Source Data:

Transportation Research Board Annual Meeting 2017 Paper #17-05715

Files:

PRP, TRIS, TRB, ATRI

Created Date:

Dec 8 2016 12:17PM