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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/1340

Title: Multilayered elastic analysis formulation for surface moment loading
Authors: Maina, JW
Keywords: Multilayered elastic analysis
Surface moment loading
Pavement structures
Three layer systems
Trapezoidal load
TRB 85th Annual Meeting, 2006
Issue Date: Jan-2006
Citation: Maina, JW. 2006. Multilayered elastic analysis formulation for surface moment loading. TRB 85th Annual Meeting, pp 28
Abstract: When pavement structures like roads and runways are under simultaneous actions of vehicular vertical and horizontal wheel loading, analysis is normally performed considering these loads as uniformly distributed vertical and horizontal loads, respectively. Measurements by Stress-In-Motion (SIM) technology on slow (creep) speed truck tires have shown that, depending on the magnitude of the load, there are acceptable "n" or unacceptable "m" shaped stress distributions at the tire/road interface. In order for accurate mathematical derivation of, for example, non-uniform "m" shaped surface stress to be performed, authors have proposed introduction of a moment-like surface loading. Detailed derivation of closed form solutions of pavement response due to the action of non-uniform circular loading is presented in this paper. Results show that maximum compressive stress at the pavement surface due to triangular load was greater by 20% and 70% than results from uniformly distributed vertical load and horizontal load respectively. Morever, there was an increase of more than 60% in tensile strain at the bottom of the asphalt layer, Ex, and compressive strain, Ez, at the top of subgrade layer for triangular load as compared to uniformly distributed load. Planned future publications will use results from SIM measurements and look at practical implications of this type of non-uniform loading on performance of different types of pavement structures.
Description: 2006: TRB 85th Annual Meeting
URI: http://hdl.handle.net/10204/1340
ISBN: 0309099528
Appears in Collections:Infrastructure engineering
General science, engineering & technology

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