TAILIEUCHUNG - Calculation of pavement permanent deformation using perzyna’s elasto viscoplastic model

In this work, a method for calculation of pavement permanent deformation due to traffic loading is presented. The mechanics behavior of asphalt concrete layer is considered as Perzyna’s elasto-viscoplastic material. The pavement permanent deformation is incrementally calculated using nonlinear finite element method. Model parameters are determined using Hamburg Wheel Tracking Test result. | Tạp chí Khoa học và Công nghệ 54 (1) (2016) 150-160 CALCULATION OF PAVEMENT PERMANENT DEFORMATION USING PERZYNA’S ELASTO-VISCOPLASTIC MODEL Nguyen Huynh Tan Tai1, 2, * 1 2 Civil Engineering Department, Thu Dau Mot University, Binh Duong, Vietnam Research-Development and Testing Division, BMT Investment Construction Joint Stock Company, Ho Chi Minh City, Vietnam * Email: tainht@, tainht@ Received: 28 November 2014; Accepted for publication: 24 November 2015 ABSTRACT In this work, a method for calculation of pavement permanent deformation due to traffic loading is presented. The mechanics behavior of asphalt concrete layer is considered as Perzyna’s elasto-viscoplastic material. The pavement permanent deformation is incrementally calculated using nonlinear finite element method. Model parameters are determined using Hamburg Wheel Tracking Test result. Keyworks: pavement permanent deformation, rut depth prediction, elasto-viscoplastic model, finite deformation. 1. INTRODUCTION Pavement permanent deformation (or rutting) is a common distress of pavement structure in Vietnam. The cause of this kind of distress is due to the fact that the asphalt concrete pavement does not completely recover its deformation under the action of repeated vehicle loading. With tropical climate in Vietnam, the temperature in asphalt concrete surface layer can reach more than 70 °C at hottest time of the day. This temperature exceeds softening point of most bitumen used and therefore facilitates rutting formation. Asphalt concrete is a material with viscous and plastic properties. When loading is applied and released, there exists an irreversible part of deformation called plastic deformation. After a certain number of load passes, plastic deformation is cumulated enough to create ruts on pavement surface, which cause difficulty with vehicles traveling on it. Prediction methods are necessary for pavement engineers to analyze the long-term behavior of pavement and .

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• Vietnam Journal of Science and Technology
• Calculation of pavement permanent deformation
• Perzyna’s elasto viscoplastic model
• Pavement permanent deformation
• Rut depth prediction
• Elasto viscoplastic model
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