Flexible Pavement Strains Caused by Auto Tires

Roberts, F L

doi:10.1061/(asce)0733-947x(1987)113:5(471)

Cited by 5 publications

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“…Speed studies can be performed in each urban or rural setting where appropriate decisions can be taken on a set of speeds most appropriate locally. Generally, the results achieved in the static as well as that of the dynamic analysis agree with studies that considered the effect of vehicle speed and field axle loads on the measured tensile strains (Timm et al 1998, Roberts 1989, Sven et al 1992, Zafir et al 1994, Lin and Gazis 1999, Dorman 1965). In addition, the outcome of this research gives a practical method of designing flexible pavement structure, yet it depends partly on the mechanical approach which opens the way for the utilizing the changing variables introduced in the analysis of pavement structures.…”

Section: Model Evaluationsupporting

confidence: 83%

“…Previous research considered several approaches in model formulation and assumptions (Hewany et al 1998, Aliet et al 1998, Roberts 1989, Ioannides and Khazanorich 1998, Mamlouk et al 2000, Tielking and Roberts 1989, Das and Pandey 1999, Hudson et al 1998, Sven et al 1992, Bright and Mays 1996. The dynamic vehiclepavement-foundation interaction effect is significant for the analysis of dynamic response of pavements subjected to moving loads (Siddharthan et al 1998, Wu and Shen 1996, Zafir et al 1994, Lin and Gazis 1994.…”

Section: Novak Et Al (mentioning

confidence: 99%

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Simplified M-E Approach for the Design of Flexible Pavement Structures

Abaza¹

2007

مجلة النجاح للعلوم الطبيعية

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This paper presents a simplified design procedure, which depends mainly on finite elements analysis considering the same input variables used in the traditional AASHTO empirical design methodology. The multiple regression equation developed considered the subgrade resilient modulus (Mr), Equivalent Single Axle Load (ESAL) repetitions, and the dynamic behavior of flexible pavements by incorporating vehicle speed. The outputs of this model are given in terms of structural number (SN) making it easier for the designer to deal with the various pavement thickness as per the traditional AASHTO procedure. Based on the model developed for static loading, SN values were approximately -6 to 7 percent compared to those of AASHTO design methodology depending on number of 18 kips single axle load repetitions. In the analysis of the dynamic behavior of pavements, SN dropped up to 30 percent for the practical design speeds that could be considered for pavement design purposes. تمثل هذه الورقة العلمية تصميم مبسط للرصفات الإسلفتية باستخدام العناصر المحددة بالإضافة إلى المتغيرات المستخدمة بالطريقة التقليدية لتصميم الطرق حسب مواصفات الجمعية الأمريكية للطرق والمواصلات AASHTO. المعادلة التي تم استنتاجها لهذا الغرض متعددة المتغيرات، وتشمل استخدام معامل القوة للتربة الطبيعية ((Mr ومعاملات تحويل المحاور للمحور التمثيلي، وكذلك سرعة المركبات على الطريق المقترح للتصميم. وقد أعطيت مستخرجات المعادلة بدلالة المعامل الإنشائي SN للتسهيل على المصمم لإيجاد سماكات الرصفة بالطريقة التقليدية المتعارف عليها. يتبين من نتائج هذا البحث لحالة التحليل الاستاتيكي أن النتائج كانت بحدود -6 إلى 7% من تلك النتائج المستخدمة بإتباع آلية التصميم الخاصة ب AASHTO وذلك معتمداً على عدد المحاور الفردية من نوع 18 Kips. أما بالنسبة للتحليل الديناميكي، فقد أظهرت النتائج أنها أقل بمقدار 30%، وذلك اعتمادا على مدى السرعة المتوسط لأنواع الطرق المختلفة.

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Section: Model Evaluationsupporting

confidence: 83%

Section: Novak Et Al (mentioning

confidence: 99%

Simplified M-E Approach for the Design of Flexible Pavement Structures

Abaza¹

2007

مجلة النجاح للعلوم الطبيعية

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“…Yet, one of the limitations, as stated in the paper (Uzan and Sides 1987), was that the solution may not converge in some cases of very thick layers. Tielking and Roberts (1987) and Roberts (1987) modified the finite eiement code ILLIPAVE developed by Duncan et al (1968) to allow a nonuniform and noncircular pressure distribution to be calculated. The tire-pavement contact pressure was numerically evaluated from a static finite element tire model.…”

Section: Theoretical Background and Computer Program Viemmentioning

confidence: 99%

“…A number of authors, including Christison et al (1978), Marshek et al (1986aMarshek et al ( , 1986b, Chen et al (1986), Roberts (1987), Uzan and Sides (1987), Christison (1989), Krarup (1991), and Groenendijk et al (1994), have measured Or calculated the influences of tire-pavement contact pressure on the stresses and strains in asphalt concrete pavements. It is a general consensus that details of the contact pressure distributions affect stresses and strains near the surface of the pavements, whereas the response in the lower layers depends mainly on the overall load.…”

Section: Introductionmentioning

confidence: 99%

Effects of tire – pavement contact pressure distributions on the response of asphalt concrete pavements

Yue¹,

Svec²

1995

Can. J. Civ. Eng.

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. Engineering, 22, 5, pp. 849-860, 1995-10-01 Effects of tire -pavement contact pressure distributions on the response of asphalt concrete pavements Yue, Z. Q.; Svec, O. J. Canadian Journal of Civilhttp://www.nrc-cnrc.gc.ca/irc Effe c t s of t ire -pa ve m e nt c ont a c t pre ssure dist ribut ions on t he re sponse of a spha lt c onc re t e pa ve m e nt s NRCC-38864Yue, Z.Q.; Svec, O.J. October 1995A version of this document is published in / Une version de ce document se trouve dans:Canadian Journal of Civil Engineering, 22, (5), pp. 849-860, October 01, 1995 The material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples renseignements : http://lois.justice.gc.ca/fr/showtdm/cs/C-42 849Effects of tire -pavement contact pressure distributions on the response of asphalt concrete pavements Zhong Qi Vue and Otto J. Svec Abstract: The paper presents the development of a computer program VIEM for the elastic analysis of multilayered elastic pavements under the action of arbitrary tire-pavement contact pressure distributions. The techniques adapted in VIEM primarily involves the use of a two-dimensional numerical integration to integrate point load solutions over the distributed pressure after discretizing the contact area into a finite number of triangular or quadrilateral elements. Values of contact pressure are inputted at the node points of discretized area. Numerical verification of VIEM indicates that numerical solution of high accuracy caD be efficiently calculated for the elastic response of multilayered asphalt pavements.As a result, the determination of displacements and stresses (strains) can be achieved using a personal computer. With the use of VIEM, a theoretical investigation is further perfonned to illustrate the effects of tire-pavement contact pressure distributions...

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“…p P a ( 2.1 ) a : radio de contacto de la presión uniforme P : carga total en el neumático p : presión de inflado Los estudios realizados por Tielking y Scharpery (1980) y Tielking y Roberts (1987) han demostrado que la estructura del neumático afecta significativamente la presión transmitida a la superficie de contacto y que las distribuciones son en realidad no uniformes. Roberts (1987) estuvo de acuerdo con esto y afirmó que la hipótesis de una presión uniforme sólo es válida si el neumático no tiene integridad estructural, tal como una cámara de aire. Akram et al (1992) informaron que ésta suposición simplifica el análisis y no tiene efecto significativo sobre los niveles de tensión en las capas bituminosas en espesores superiores a 51mm (2in).…”

Section: Figura 23: Distribución De La Cargaunclassified

Factores de equivalencia de daño en pavimentos flexibles: análisis para condiciones típicas de Argentina

Monteros¹,

Javier²

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En la etapa de estudio, el diseño de pavimentos flexibles exige un adecuado conocimiento de la relación entre las cargas por eje y los agentes que determinan la vida útil de estas estructuras. Un factor importante para determinar esa relación es el denominado factor de equivalencia de daño/carga (LEF – Load Equivalency Factor), que se utiliza para cuantificar los efectos del daño de diferentes configuraciones de ejes y cargas en términos de un número equivalente de ejes estándares. La red Argentina de carreteras y el transporte asociado a esta poseen características propias que los diferencian de otros países por lo cual contar con modelos locales de factores de equivalencia de daño es indispensable para un adecuado dimensionamiento del pavimento. Se realizó un estudio y análisis de las condiciones nacionales de tráfico, cargas, presiones neumáticos, paquetes estructurales, módulos, espesores, subrasantes y clima de Argentina. Luego se analizaron los distintos modelos LEF que ya han sido estudiados en diferentes países del mundo, para proponer un modelo para las condiciones locales. Se simuló mediante un software elástico multicapa el paso de diferentes tipos de ejes (simple, tándem y trídem) sobre diferentes tipos de pavimentos de características locales (Argentina). De la simulación se obtuvo la respuesta del pavimento con lo cual se calcularon y analizaron los factores de equivalencia de daño para cada uno de las tipologías de ejes características.

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Flexible Pavement Strains Caused by Auto Tires

Cited by 5 publications

References 0 publications

Simplified M-E Approach for the Design of Flexible Pavement Structures

Simplified M-E Approach for the Design of Flexible Pavement Structures

Effects of tire – pavement contact pressure distributions on the response of asphalt concrete pavements

Factores de equivalencia de daño en pavimentos flexibles: análisis para condiciones típicas de Argentina

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