01622709

Component

Joint fault is a common distress of airfield concrete pavements, appearing as the different elevation between adjacent slabs at the joints. Severe joint fault would increase the aircraft-generated dynamic loads, which may accelerate the failure of landing gears and pavement structures. This paper presents a numerical analysis to study the aircraft-generated dynamic loads on different forms of joint faults, and the differences between single-joint fault (SJF) and multi-joint faults (MJF) are discussed. In the numerical analysis, the aircraft is modeled as a four-degree of freedom vibration model, and the tire trajectory of joint passing-over is described, which is relevant to the tire-pavement contact length and height of joint fault. The maximum-dynamic-load ratio (d sub max) is put forward to measure the variation of dynamic load. Calculation results indicate that the moving speed and height of the joint fault have significant effects on the dynamic loads, then a multiple-parameters regression model is proposed for estimation of d sub max. Furthermore, differences between SJF and MJF are analyzed, and it’s deduced that MJF would further increase the fluctuation range of dynamic loads and the increase is strongly related to the quantity of faults and slab length.

This paper was sponsored by TRB committee AFD50 Standing Committee on Design and Rehabilitation of Concrete Pavements. Alternate title: Study of Dynamic Load Generated by Aircrafts and Concrete Slab Joint Faults.

01618707

17-01817

English

16p

2017

Transportation Research Board 96th Annual Meeting

Digital/other

Figures; References; Tables

Aircraft; Airport runways; Concrete pavements; Dynamic loads; Pavement joints; Regression analysis; Rolling contact

Joint faulting

Aviation; Pavements

Transportation Research Board Annual Meeting 2017 Paper #17-01817

TRIS, TRB, ATRI

Dec 8 2016 10:38AM