Author: Lia Myriam Ricalde
Publisher:
ISBN:
Category :
Languages : en
Pages : 214

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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The contribution of a cement-stabilized base course to the strength of the rigid pavement structure is poorly understood. The objective of this research was to obtain data on the response of the ng'id pavement slab-joint-foundation system by conducting laboratory-scale experiments on jointed rigid pavement models and to develop a comprehensive three-dimensional (3D) finite element model of the rigid pavement slabjoint4oundation system that can be implemented in the advanced pavement design concepts currently under development by the Federal Aviation Administration. Evidence from experiments conducted on six laboratory-scale jointed rigid pavement models suggests that the joint efficiency depends upon the presence and condition of a stabilized base. The presence of cracking in the base and the degree of bonding between the slabs and the stabilized base course influence the structural capacity and load transfer capability of the rigid pavement structure. The finite element model developed in this research indicates that a comprehensive 3D finite element modeling technique provides a rational approach to modeling the structural response of the jointed rigid airport pavement system. Modeling features which are required include explicit 3D modeling of the slab continua, load transfer capability at the joint (modeled springs between the slabs), explicit 3D modeling of the base course continua, aggregate interlock capability across the cracks in the base course (again, modeled by springs across the crack), and contact interaction between the slabs and base course. The contact interaction model feature must allow gaps to open between the slab and base. Furthermore, where the slabs and base are in contact, transfer of shear stresses across the interface via friction should be modeled.

Author: Abdelaziz Ahmed Bohagr
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Michael I. Hammons
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 107

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Author: Michael I. Hammons
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: A. Scarpas
Publisher:
ISBN: 9789080702011
Category : Computer modeling
Languages : en
Pages : 494

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Author: Bassam Saad
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 107

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The objective of this research project is to develop an analytical model for rigid pavement joints that can be implemented into advanced pavement design models. This report documents a background investigation including a comprehensive review of rigid pavement joint models with particular emphasis on their joint and foundation modeling capabilities. The major historical developments in airport rigid pavement design are discussed. Closed form solutions akin to those by Westergaard were derived in this study for the maximum responses on the unloaded side of a rigid pavement slab edge capable of a degree of load transfer. When used together with Westergaard's own closed form equations for the free edge problem, the formulae derived in this study constitute a complete solution of the edge load transfer problem, recognized over the years as a critical consideration in rigid pavement design. The newly derived solution is presented in convenient form for routine engineering application and is compared to earlier finite element data. The improvement in ease of application and precision is considerable.

Author: Zhong Wu
Publisher:
ISBN:
Category : Accelerated life testing
Languages : en
Pages : 113

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The objective of the research is to develop a finite element (FE) model(s) to simulate pavement structural performance of stabilized base and treated subbase materials under accelerated loading so that the performance of pavement structures with other stabilized base and subbase materials can be predicted without running accelerated pavement testing (APT) tests. A permanent deformation (P-D) material model was proposed in this study to simulate the permanent deformation behavior of pavement base and subgrade materials under repeated loading.

Author: B. Vuong
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 34

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