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The Stress Analysis for Surface Layer of Cement Concrete Pavement with Function Layer

Author: SunMeng
Tutor: ChenShuanFa
School: Chang'an University
Course: Road and Railway Engineering
Keywords: Cement Concrete Pavement Pavement structure design method Load stress Temperature stress Finite Element Method
CLC: U416.216
Type: Master's thesis
Year: 2010
Downloads: 115
Quote: 0
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Abstract


Cement concrete pavement is widely used as a common form of road with high strength, good stability, long service life , repair and maintenance costs , etc. , causing the attention of the road engineering sector . However, due to poor contact between the cement concrete pavement surface and base is the main cause of road damage , set the layer functional layer can alleviate this problem. Existing cement concrete pavement design specification of cement concrete pavement design method to do the detailed provisions , but did not consider the design of coordination between the surface and base . Taking into account the fatigue of the surface and base of cement concrete pavement structural design is of great significance . This paper first describes the finite element method, provides a theoretical basis for the future application of the finite element method . Contact conditions between the different layers below the load stress analysis using the finite element software obtained interlayer contact across the status of the load stress have a greater impact . Conditions most unfavorable layer contact , the law of load stress analysis of the different parameters of the opposite layer , set the function layer , the surface layer load stress increases slightly , primary load stress decreases slightly . On the basis of the analysis of the law , through a large number of uniform design , return to a rigid base and semi-rigid base cement concrete pavement surface load stress practical formula . And the surface layer the load stress formulas and fatigue equation , respectively derived rigid base and semi-rigid base cement concrete pavement surface axis Exchange Formula and fatigue stress coefficient . Set the layer functional layer of rigid and semi-rigid cement concrete pavement temperature stress calculations, analyze the impact of different variables on its temperature stress obtained were investigated . Compared to the surface layer temperature warping stress , the primary temperature warping stress is very small . Return to uniform design calculations and formulas , to draw practical formula of rigid and semi-rigid cement concrete pavement surface temperature stress . Opposite the load stress analysis , have come forward to the coordination between the layer thickness and base thickness design , and considering both the surface and base fatigue cement concrete pavement design method .

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