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Nolinear Analysis of Asphalt Pavement in High-altitude Areas of Yunnan Province

Author: XieQiao
Tutor: ZhangWeiQuan
School: Chongqing Jiaotong University
Course: Road and Railway Engineering
Keywords: Asphalt Pavement High altitudes ANSY finite element program Nonlinear Analysis Graded gravel
CLC: U416.217
Type: Master's thesis
Year: 2010
Downloads: 55
Quote: 1
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Abstract


Semi- rigid asphalt pavement structure is commonly used by our existing highway pavement structure type , but this structure type have been built road traffic survey found that , by the effects of temperature and humidity is very prone to shrinkage cracking , thereby causing the asphalt surface layer reflective cracking and induce other structural hazards , and greatly reduce the life of the asphalt pavement . Using strict gradation and construction technology of high-quality graded gravel as a transition layer between the asphalt surface and semi-rigid base , can better solve the high altitude areas in Yunnan serious semi-rigid asphalt pavement cracks and drainage problems . Consider the nonlinear stage macadam material , Yunnan high altitude pavement structure nonlinear analysis of systematic study , and this flip structure transition level with gravel material design parameters . In this paper, a nonlinear theory foundation and ANSYS finite element analysis program , through the establishment of static elastic-plastic model of the pavement structure , the analysis of the structure of the surface layer of asphalt in the asphalt pavement flip structure stress-strain law and grading macadam plastic material parameters of asphalt pavement mechanical properties . Through the establishment of the dynamic elastic-plastic model , consider the pavement level under dynamic loading with nonlinear characteristics of the gravel material , single load and stress of the pavement structure under repeated load strain differences ; taking into account the plastic material parameters of grading macadam the impact of permanent deformation characteristics , and concludes with a suitable high altitude areas in Yunnan graded gravel plastic parameters recommended values ??. For the Yunnan special climate characteristics , consider the characteristics of the asphalt mixture stiffness modulus changes with temperature , the numerical simulation of asphalt pavement coupling effect and vehicle load , critical mechanical response under different temperature field conditions at high altitudes , analyze various response indicators of changes with the temperature and interlayer contact state characteristics .

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CLC: > Transportation > Road transport > Road works > Roadbed, pavement engineering > Pavement Engineering > Road : use of the material points > Asphalt Pavement
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