|Table of Contents|

Determination of grid interlayer rational position in asphalt overlay structure(PDF)

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

Issue:
2009年05期
Page:
1-6
Research Field:
Publishing date:
2009-10-20

Info

Title:
Determination of grid interlayer rational position in asphalt overlay structure
Author(s):
WANG Chaohui;  WANG Xuancang;  LI Jingjing
School of Highway, Changan University, Xian 710064, Shaanxi, China
Keywords:
road engineering;  asphalt overlay;  shear behavior;  interlayer rational;  rational position;  finite element
PACS:
U418.8；U416.0
DOI:
-
Abstract:
The common shear damage pattern and generation mechanism of asphalt overlay are firstly analyzed, and then the finite element model is established, the reinforcement effect of different interlayer positions based on shear behavior of asphalt overlay is comparatively studied. Meanwhile, the change law of shear stress vertical position of asphalt overlay, along with axle load, vertical cracking depth of old road, transverse cracking width of old road, horizontal load, thickness of overlay, and the ratio between modulus of overlay and equivalent resilient modulus of old road, is calculated. The results show that the distribution of maximum shear stress about the overlay structure is changed by adding the grid, and the significant effect is only obtained at the location where the maximum shear stress of overlay structure and the minimum range of its surrounding are reinforced, and also the vertical position of maximum shear stress of asphalt overlay is only changed along with the modulus ratio and thickness of overlay. Finally, the rational position of interlayer based on shear behavior of asphalt overlay structure is proposed. 6 tabs, 4 figs, 10 refs.

References:

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Last Update: 2009-10-20