Influences on the Axle Load Stress of the Cement-Concrete Pavement Structure Caused by the Crack or Cutting Crack of the Semi-Rigid Base

2013 ◽  
Vol 857 ◽  
pp. 200-203
Author(s):  
Bin Yang ◽  
Hua Tan ◽  
Jia Xi Deng ◽  
Chan Pang
Keyword(s):  
Working Conditions ◽  
Crack Width ◽  
Concrete Pavement ◽  
Rigid Base ◽  
Cement Concrete ◽  
3D Fem ◽  
Cement Concrete Pavement ◽  
Dry Shrinkage ◽  
Pavement Structure ◽  
The One

Some horizontal cracks will appear during the strength formation of the semi-rigid base, for the influences of dry shrinkage and temperature shrinkage exist, so the engineers often adopt the manual method of equidistant cutting crack to avoid the irregular cracks. In order to analyse the influences on the axle load stress of the cement-concrete pavement slab which caused by the width and position of the base cracks or cutting cracks, the 3D FEM was used to study them under the different working conditions considering the crack, width and position. By the above research, the results show the existing cracks affect the integrity and continuity of the pavement structure; The crack width has no large influence on the stress of the pavement slab, while the base stress decreases apparently with the increasing width, and it becomes stable finally; The stress of the pavement slab is maximum when the crack or cutting crack is located in the middle, while it's small when the crack or cutting crack is located in the one fourth of the pavement slab.

Effects of Flexible Functional Layer Incorporated with Rubber Powder on the Vibration Reduction of Cement Concrete Pavement

2013 ◽  
Vol 368-370 ◽  
pp. 929-932
Author(s):  
Bin Yang ◽  
Jiang Wang ◽  
He Yuan Yang ◽  
Ling Nian Zeng ◽  
Chao Feng ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Vibration Reduction ◽  
Impact Resistance ◽  
Concrete Pavement ◽  
Test Method ◽  
Cement Concrete ◽  
Functional Layer ◽  
Rubber Powder ◽  
Cement Concrete Pavement ◽  
Pavement Structure

Small sized specimen of cement concrete pavement structure was prepared indoors. By utilizing the dynamic signal tester and obtaining the vibration frequency domain signals through the falling-ball vibration impact test method, the attenuation rules of the vibration response of the pavement structure were analyzed and the effects of the flexible functional layer on the vibration-reduction and energy-absorption were studied. The results showed that, after compared with the normal flexible functional layer, the flexible functional layer incorporated with rubber powder resulted in the pavement structure having the better capacities of vibration-reduction energy-absorption and impact resistance. Accordingly, the rupture failure of the cement concrete pavement induced by vehicle load can be reduced.

Study on Properties of Plate Performance of Black Substratum Cement Concrete Pavement

2013 ◽  
Vol 834-836 ◽  
pp. 745-748
Author(s):  
Wei Yu ◽  
Xuan Cang Wang ◽  
Jian Jiao Zhou ◽  
Zhi An Feng
Keyword(s):  
Element Model ◽  
Vertical Displacement ◽  
Deformation Energy ◽  
Concrete Pavement ◽  
Base Layer ◽  
Cement Concrete ◽  
Rigid Pavement ◽  
Cement Concrete Pavement ◽  
Pavement Structure ◽  
Structure Layer

In order to improve aderverse state of connection between cement concrete pavement and base layer, the black substratum of asphalt concrete was set between pavement and base layer. According to the elastic mechanics theory, 3d finite element model of pavement structure was established, the vertical displacement of each structure layer was analyzed by using ANSYS. The results show that black substratum can absorb part of deformation energy by using its good deformation ability, so as to improve the stress condition of the entire pavement structure. It can increase the ability of structure layer deformation coordination to set the black substratum, which can make rigid pavement combine the characteristics of rigid pavement and flexible pavement.

Stress Characteristic Analysis of Repaving Asphalt Pavement Structure on Old Cement Road

2012 ◽  
Vol 594-597 ◽  
pp. 1377-1381 ◽  
Author(s):  
Hong Lu Mao ◽  
Pei Zhi Zhuang ◽  
Ya Nan Zang ◽  
Xiao Ming Yi
Keyword(s):  
Shear Stress ◽  
Compressive Stress ◽  
Asphalt Pavement ◽  
Rigid Base ◽  
Cement Concrete ◽  
Characteristic Analysis ◽  
Finite Element Software ◽  
Splitting Failure ◽  
Cement Concrete Pavement ◽  
Pavement Structure

To solve the early destruction problems occurred when overlaying asphalt pavement structure containing semi-rigid base on broken cement concrete pavement, finite element software is used to compare the stress characters between the repaving pavement and ordinary pavement, and analyze the repaving structures under different loads and different road transverse grade. It shows that the value of compressive stress at the top of base of repaving pavement is significantly higher than that of ordinary pavement, meanwhile, its value of tensile stress of base bottom is lower; the asphalt surface and new base top of repaving pavement need to bare a high value of shear stress and compressive stress under overload, so it’s prone to splitting failure in the base. With the increase of transverse grade, both the shear stress difference of road surface and maximum vertical compressive at top of the base increase in a lower position, but the situation is opposite in the higher position.

Analysis on Void Beneath Curling Slab in Rigid Base Cement Concrete Pavement and Fatigue Life Prediction

2012 ◽  
Vol 204-208 ◽  
pp. 1782-1788 ◽  
Author(s):  
Qing Zhang ◽  
Yun Chen Sun ◽  
Jing Jing Li
Keyword(s):  
Fatigue Life ◽  
Temperature Gradient ◽  
Service Life ◽  
Life Prediction ◽  
Concrete Pavement ◽  
Fatigue Life Prediction ◽  
Rigid Base ◽  
Cement Concrete ◽  
Cement Concrete Pavement ◽  
Fatigue Life Analysis

The damages in two rigid base cement concrete pavement were investigated. The data analysis suggests that the void beneath curling slab resulting from the temperature gradient changing leads to pavement damages. With the benefit of the pavement curling structure numerical model established in this article, the void changing law beneath curling slab and loading stress were analyzed. The loading stress level increases dramatically due to void occurring beneath curling slab. The calculation method of loading stress in the curling slab was given. The fatigue life analysis further reveals that the void beneath curling slab caused by temperature gradient changes is the fundamental reason for the decreasing of the service life of cement concrete pavement. The service life of investigating section were predicted and analyzed according to the fatigue life prediction model established in this article and the survey data.

Expansive reactions in cement concrete pavement structure and the way how to analyse the risk of their occurrence

2016 ◽  
pp. 1431-1439
Author(s):  
Josef Stryk ◽  
Zdenek Nevosad ◽  
Miroslava Gregerova ◽  
Ales Frybort ◽  
Vladimir Chupik
Keyword(s):  
Concrete Pavement ◽  
Cement Concrete ◽  
Cement Concrete Pavement ◽  
Pavement Structure ◽  
The Way

Load Stress Analysis of the Impact of Parameters Variation on Super-Thick Cement Concrete Pavement

2011 ◽  
Vol 255-260 ◽  
pp. 3254-3257 ◽  
Author(s):  
Bin Yang ◽  
Li Jun Suo ◽  
Chun Ren Zhou ◽  
Kai Liang Dong
Keyword(s):  
Concrete Slab ◽  
Element Model ◽  
Concrete Pavement ◽  
Slab Thickness ◽  
Structure Parameters ◽  
Cement Concrete ◽  
Obvious Effect ◽  
Cement Concrete Pavement ◽  
Pavement Structure ◽  
The Impact

With the goal of exploring the impact of pavement structure parameters on load stress of super-thick cement concrete pavement, this paper, based on the Quanxing freeway in Guangxi, analyzes the load stress in the situation of the separated type and combined type contact between the cement concrete slab and the lean concrete base by using three-dimensional finite element model. Computational results show that the variation of different pavement structure parameters have various impacts on the load stress of super-thick cement concrete pavement. The load stress σc1 of super-thick cement concrete pavement slab declines with the increase of slab thickness h1 and base thickness h2 and decreases with the reduction of slab length L and the increases of base modulus E2 and subbase modulus Et. Among them, the variation of slab thickness h1 has the greatest impact on the pavement load stress. Thus, there is a quite obvious effect in reducing the pavement load stress by increasing the slab thickness.

Effects of Flexible Functional Layer on the Load Stress of Cement Concrete Pavement Structure

2013 ◽  
Vol 368-370 ◽  
pp. 1652-1656
Author(s):  
Bin Yang ◽  
Wei Liang ◽  
Xiang Xin Zeng ◽  
Jin Hua Huang
Keyword(s):  
Numerical Simulation ◽  
Concrete Pavement ◽  
Ansys Software ◽  
Cement Concrete ◽  
Functional Layer ◽  
Force Condition ◽  
Vehicle Load ◽  
Cement Concrete Pavement ◽  
Pavement Structure

The vehicle load stresses of the cement concrete pavement structure with/without flexible functional layer were contrastively analyzed by numerical simulation with using ANSYS software. The results showed that the load stress of the cement concrete pavement structure with flexible functional layer was much lower than that without flexible functional layer under the vehicle load. Consequently, the force condition of the pavement structure was effectively improved by the flexible functional layer.

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