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

Issue:

2016年01期

Page:

1-7

Research Field:

道路与铁道工程

Publishing date:

Info

Title:

Calculation method of moisture warping stress for cement concrete pavement slab

Author(s):

ZHANG Xiao¹; 2;  ZHAO Hong-duo²;  ZHAO Dui-jia¹;  SUN Li-jun²

1. Key Laboratory of Highway Construction and Maintenance Technology of Ministry of Transport in Loess Region, Shanxi Transportation Research Institute, Taiyuan 030006, Shanxi, China;
2. School of Transportation Engineering, Tongji University, Shanghai 201804, China

Keywords:

pavement engineering;  moisture warping stress;  equivalent temperature gradient;  continuously reinforced concrete pavement;  finite element;  base type;  top slab stress;  steel stress;  crack width

PACS:

U416.216

DOI:

-

Abstract:

In order to analyze the impact of moisture gradient on mechanical properties of cement concrete pavement, the calculation formulas of moisture warping stress for nonhomogeneous infinite pavement slabs subjected to free-rein constrain, axial deformation constraint, bending deformation constraint, bending-axial deformation constraint were derived by using the basic analysis method of elasticity mechanics. The formula of equivalent temperature gradient based on the moisture warping stress was derived by using the equivalent principle of moment. Based on continuously reinforced concrete pavement(CRCP), the stresses and crack widths of concrete slab and steel stresses were computed by using the finite element method based on cement stabilized base, stable aggregate base, asphalt concrete base, asphalt stabilized base, limestone soil base and natural soil base. Research result shows that the magnitude of moisture warping stress depends on the relative humidity distribution; the surface stress at slab middle increases with the increase of base stiffness, when the stiffness of base increases from 0.08 MPa·mm^-1 to 6.28 MPa·mm^-1, the surface stress increases from 4.1 MPa to 6.3 MPa; the type of base hardly has influence on the stress of steel; the horizontal displacement of crack end gradually increases from 0.0 mm to 2.9 mm from slab bottom to surface. 4 tabs, 10 figs, 22 refs.

References:

[1] 魏 亚.水泥混凝土路面板湿度翘曲形成机理及变形计算[J].工程力学,2012,29(11):266-271. WEI Ya. Mechanism of moisture warping and deformation calculations in concrete pavements[J]. Engineering Mechanics,2012, 29(11): 266-271.(in Chinese)
[2] BUCH N, ZOLLINGER D G. Preliminary investigation on effects of moisture on concrete pavement strength and behavior[J]. Transportation Research Record, 1993(1382): 26-31.
[3] JANSSEN D J. Moisture in portland cement concrete[J]. Transportation Research Record, 1987(1121): 40-44.
[4] JEONG J H, ZOLLINGER D G. Environmental effects on the behavior of jointed plain concrete pavements[J]. Journal of Transportation Engineering, 2005, 131(2): 140-148.
[5] DAVIS R E, TROXELL G E. Modulus of elasticity and Poisson's ratio for concrete and the influence of age and other factors upon these values[C]∥American Society for Testing Materials. Proceedings of American Society for Testing Materials 1929. West Conshohocken: American Society for Testing Materials, 1929: 678-710.
[6] JOHNSTON C D. Concrete and its constituent materials in uniaxial tension and compression[D]. Belfast:Queen's University of Belfast, 1967.
[7] WARD M A. The mechanism of tensile creep in concrete[J]. Magazine of Concrete Research, 1969, 21: 151-158.
[8] YAMAN I O, AKTAN H M, HEARN N. Active and non-active porosity in concrete Part II: evaluation of existing models[J]. Materials and Structures, 2002, 35(2): 110-116.
[9] YAMAN I O, HEARN N, AKTAN H M. Active and non-active porosity in concrete Part I: experimental evidence[J]. Materials and Structures, 2002, 35(2): 102-109.
[10] WANG Hai-long, LI Qing-bin. Prediction of elastic modulus and Poisson's ratio for unsaturated concrete[J]. International Journal of Solids and Structures, 2007, 44(5): 1370-1379.
[11] SHOUKRY S N, WILLIAM G W, DOWNIE B, et al. Effect of moisture and temperature on the mechanical properties of concrete[J]. Construction and Building Materials, 2011, 25(2): 688-696.
[12] LIU Bao-dong, LU Wen-juan, LI Lin, et al. Effect of moisture content on static compressive elasticity modulus of concrete[J]. Construction and Building Materials, 2014, 69: 133-142.
[13] MOHAMED A R, HANSEN W. Effect of nonlinear temperature gradient on curling stress in concrete pavements[J]. Transportation Research Record, 1997(1568): 65-71.
[14] WEI Y, HANSEN W. Characterization of moisture transport and its effect on deformations in jointed plain concrete pavement[J]. Transportation Research Record, 2011(2240): 9-15.
[15] IOANNIDES A M, KHAZANOVICH L. Nonlinear temperature effects on multilayered concrete pavements[J]. Journal of Transportation Engineering, 1998, 124(2): 128-136.
[16] BRADBURY R D. Reinforced Concrete Pavements[M]. Washington DC: National Academy of Sciences, 1938.
[17] WESTERGAARD H M. Analysis of stresses in concrete pavements due to variations of temperature[C]∥UPHAM C M, STEINBERG S S. Proceedings of the Sixth Annual Meeting of the Highway Research Board. Washington DC: Highway Research Board, 1927: 201-215.
[18] PICKETT G. Effect of aggregate on shrinkage of concrete and a hypothesis concerning shrinkage[J]. Journal of the American Concrete Institute, 1956, 56: 581-590.
[19] KIM S M, WON M C. Horizontal cracking in continuously reinforced concrete pavements[J]. ACI Structural Journal, 2004, 101(6): 784-791.
[20] KIM S M, WON M C, MCCULLOUGH B F. Mechanistic modeling of continuously reinforced concrete pavement[J]. ACI Structural Journal, 2003, 100(5): 674-682.
[21] KIM S M, WON M, MCCULLOUGH B F. Numerical modeling of continuously reinforced concrete pavement subjected to environmental loads[J]. Transportation Research Record, 1998(1629): 76-89.
[22] ZHANG J, LI V C. Influence of supporting base characteristics on shrinkage-induced stresses in concrete pavements[J]. Journal of Transportation Engineering, 2001, 127(6): 455-462.

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Last Update: 2016-02-20