Dynamic response of rigid pavement under random load#br#

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (19) : 126-130.

ZHANG Xian-min, HU Peng

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Abstract

In order to study the dynamic response of rigid pavement under the vehcle random load ,a random load excited by pavement surface roughness was obtained with the application of 1/4 vehicle model using ANSYS, which simplified the solution of load. Then a 3D finite element model of pavement is established to discuss the influences of structural parameters on maximum dynamic displacement and maximum bottom tensile stress of the surface layer. The calculated results indicate, subgrade modulus and surface layer thickness have significant effects on maximum dynamic displacement, when surface layer thickness is more than 30 cm, subgrade modulus is more than 60 MPa, continue to increase the above parameters the maximum dynamic displacement does not decrease obviously； when subgrade modulus is less than 60 MPa , it needs a greatly increase of surface layer thickness to obtain a same maximum dynamic displacement caused by the reduce of subgrade modulus; For the maximum tensile stress of the surface layer, the surface layer modulus and thickness influence most.

Key words

road engineering / rigid pavement / 3D finite element / structural parameters / random load / maximum dynamic displacement / maximum bottom tensile stress

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ZHANG Xian-min, HU Peng. Dynamic response of rigid pavement under random load#br#[J]. Journal of Vibration and Shock, 2015, 34(19): 126-130

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