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Analysis of Old Concrete Pavement with Asphalt Overlay by 3D Finete Element Method

Author: ZhuLiKun
Tutor: WangHu
School: Chang'an University
Course: Engineering Mechanics
Keywords: Reflective cracking Asphalt overlay Old Cement Concrete Pavement Finite Element Stress APP linoleum Stress Relief Layer
CLC: U416.2
Type: Master's thesis
Year: 2009
Downloads: 103
Quote: 2
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Abstract


With the rapid economic development , transportation construction in China has made great achievements . Cement concrete pavement has the advantages of high strength, good stability and good durability , road construction at home and abroad . Cement concrete pavement road performance in the long-term effect of vehicle load and environmental factors , the gradual decay . Road performance ( flatness , skid resistance and load carrying capacity ) is reduced to a limited bottom line standard , or its carrying capacity can not meet the traffic demand , asphalt overlay repair can be used to improve pavement performance . The mechanical characteristics of the structure of the old cement concrete pavement asphalt overlay , this paper established a finite element model of the multi-layer structure system , in-depth study of the mechanical properties of the asphalt overlay of the existing cement concrete pavement . Analyzed asphalt overlay on old cement concrete pavement structure reflective cracking mechanism and prevention methods , respectively sandwich and no mezzanine pavement structure model , comparative analysis of additional mezzanine vehicle loads on the stress of the asphalt overlay subduction . The pavement set of composite sandwich structure finite element analysis, come under reinforced sandwich paved stress mitigation layer can further reduce stress within the asphalt overlay and sandwich the lower layers of the end of the asphalt overlay in the next sewn on both sides of deflection difference , delaying the generation of reflective cracking phenomenon . Additional leveling layer of pavement structure in reinforced sandwich finite element analysis, to draw such Repaving Old Pavement structure to some extent reduce stress and deflection , also serve to reduce or role in delaying reflective cracks .

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CLC: > Transportation > Road transport > Road works > Roadbed, pavement engineering > Pavement Engineering
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