Primary response of pavement variation with construction variables

Buhari, Rosnawati and Md Rohani, Munzilah (2014) Primary response of pavement variation with construction variables. In: International Integrated Engineering Summit (IIES 2014), 1-4 December 2014, Universiti Tun Hussein Onn Malaysia, Johor.

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Abstract

Fatigue and rutting are two major modes of distress of flexible pavements that are typically characterized by the primary response of the pavement and so calculations of the pavement’s structural responses should be measured carefully for more accurate predictions of pavement performance. Response to it, this task aims to predict the primary response of the forces using Influence Function and Peak Influence Function Method for several differences top layer pavement thicknesses. In this tasks, both the aforementioned critical responses were highlighted, that are horizontal tensile strain at the bottom of bound layers and the vertical compressive strain on top of the sub-grade layer, that relates to fatigue and rutting damage respectively. The vertical load applied to the surface is uniformly over a circular area, leading to an axial symmetric problem. The pavement structure was modeled as semi-infinite linear elastic system considering three layers; an asphalt surface layer, a granular base layer and semi-infinite sub-grade or soil layer. A multilayer linear elastic approach was used to calculate the response of the pavement structure under uniform contact stress. The simulation results were compared to the results from BISAR application. As a finding, the comparison between computed critical strains and output from BISAR and a good consensus was reached. The variation of radial and vertical strains at the bottom of asphaltic concrete and on top of the sub-grade layer is matched well and conforms to the capability of the programme that was developed

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:influence function; peak influence function; primary response; strain; resilient modulus
Subjects:T Technology > TE Highway engineering. Roads and pavements
Divisions:Faculty of Civil and Environmental Engineering > Department of Infrastructure and Geomatic Engineering
ID Code:6517
Deposited By:Mrs. Nurhayati Ali
Deposited On:28 Jun 2015 16:03
Last Modified:28 Jun 2015 16:03

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