Stressing state analysis of concrete airport pavement by modeling experimental strain data

• Published in: Case Studies in Construction Materials 2022-12, Vol.17, p.e01635, Article e01635
• Main Authors: Shen, Zijie, Liu, Bai, Zhou, Guangchun
• Format: Article
• Language: English
• Subjects: Correlation method; Elastic-plastic branch point; Failure starting point; Mutation; Stressing state
• ISSN: 2214-5095; 2214-5095
• DOI: 10.1016/j.cscm.2022.e01635

This paper presents a stressing state modeling analysis of pavement strain data from phase I of the Federal Aviation Administration (FAA) construction cycle 8 (CC8). The objective is to reveal the operating characteristics and accurately determine the characteristic points of the stressing states of concrete pavements in the south and north halves under normal and overload. This study proposes a correlation stressing state modeling method to model the pavement strain data by converting the test strain data into basic, composite, and reconstructed state variables and establishing correlation characteristic pair (mode-characteristic parameter) to describe the interconnection between the measurement points. Then, the slope increment criterion is applied to the characteristic parameter curves to screen the characteristic points of concrete airport pavements and verify their mutation characteristics in the vicinity of the correlation mode and characteristic parameter curves. The characteristic points P and F were defined as the elastoplastic branching (EPB) points and the failure starting points, where the characteristic points of the overall stressing state in the north and south halves of the concrete airport pavement were (jP =55, jF=98) and (jP =38, jF=54), respectively. Furthermore, this study suggests that the characteristic points P and F are used as references for pavement design. •A correlation modeling analysis method is proposed for modeling concrete airport pavement’s strain data.•The state variables characterizing the stressing state of concrete pavement measurement points were established.•The elastic-plastic branching points of concrete airport pavements and the starting point of failure are revealed.•Characteristic pairs (mode-characteristic parameters) characterizing the stressing state of the pavement were established.