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《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:

2013年05期

Page:

17-26

Research Field:

道路与铁道工程

Publishing date:

Info

Title:

Analyses of structural damage and parameter sensitivity for CRCP+AC composite pavement

Author(s):

WANG Bin¹;  HUANG Wei²;  YANG Jun²;  ZHANG Lei²

1. Nanjing Metro Construction Co., Ltd., Nanjing 210008, Jiangsu, China; 2. School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China

Keywords:

road engineering;  CRCP+AC composite pavement;  structural damage analysis;  orthogonal test;  parameter sensitivity

PACS:

U416.224

DOI:

-

Abstract:

The structural plasticity damage of continuous reinforcement concrete pavement(CRCP)and asphalt concrete(AC)composite pavement was analyzed, the spatial distribution laws of structural stresses and damages under different loading conditions were studied. Orthogonal test method was used, the structural tensile damage was taken as an index, the parameter sensitivity analyses with a variety of complex structural and environmental factors were employed to obtain factor influencing laws. Based on the results of variance and range analyses, the primary and secondary factors were distinguished and ordered with their various influencing effects under temperature changing or temperature-load coupling conditions. Analysis result shows that there are differences in the distribution of structural damage along the depth range of CRCP slab, which lead to the difference distribution of tension stress. When repeated traffic loading is applied, the trend of structural damage steps up in the initial stage and is steady growth in the later stage with the intensification of structural stress softening. The normal direction of structural crack plane can be judged by the vector direction of maximum plasticity principal strain. Based on the comprehensive consideration of analysis results under different loading conditions, the thickness of asphalt layer, the linear expansion coefficient of concrete and the support state under CRCP slab are the most important influencing factors associated with the structural damage of CRCP. 12 tabs, 12 figs, 12 refs.

References:

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Memo

Memo:

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Common functions

Last Update: 2013-10-30