|Table of Contents|

Load stress of composite airport pavement(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2010年04期
Page:
23-27
Research Field:
Publishing date:
2010-08-20

Info

Title:
Load stress of composite airport pavement
Author(s):
MA Xiang;  NI Fu-jian;  CHEN Rong-sheng
School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China
Keywords:
road engineering;  composite airport pavement;  critical loading position;  three-dimensional finite element;  loading stress
PACS:
U416.224
DOI:
-
Abstract:
In order to analyze the load stress of composite airport pavement, a 3D finite element model of nine full-scale slabs is established. Choosing B777-200 as the computational loading, the tensile stress of asphalt concrete, shear stress of asphalt concrete and the tensile stress of cement concrete were calculated as analytic index. The critical loading position is determined, and the effect of pavement structural parameters to the stress is analyzed by the orthogonal design method. The results show that the tensile stress of cement concrete is the key index of load stress of composite airport pavement, and the middle axis loading of three axes loading as the edge loading case was identified to be the critical loading position. With the increase of modulus of subgrade, the tensile stress of cement concrete and asphalt concrete decreases, while increasing the modulus of concrete will have adverse effect on the tensile stress of cement concrete. During the design of this kind of structure, subgrade should be regarded to improve the strength of subgrade, and can not excessively emphasize the modulus of cement concrete, it is necessary to comprehensively consider the flexural strength to choose proportioning design of cement concrete. 9 tabs, 5 figs, 8 refs.

References:

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Last Update: 2010-08-20