The Force Impact Analysis of Steel Bridge Deck Pavement Layer Modulus and Pavement Thickness to Pavement System

2011 ◽  
Vol 368-373 ◽  
pp. 289-292
Author(s):  
San Qiang Yang ◽  
Pei Wen Hao ◽  
Li Qun Tang ◽  
Tao Liu
Keyword(s):  
Shear Stress ◽  
Elastic Modulus ◽  
Tensile Stress ◽  
Bridge Deck ◽  
Maximum Shear Stress ◽  
Maximum Tensile Stress ◽  
Steel Bridge ◽  
Epoxy Asphalt ◽  
Pavement Thickness ◽  
Bridge Deck Pavement

This epoxy asphalt used by the U.S., Japan Epoxy Asphalt two steel bridge deck pavement materials at different thickness analysis of pavement deformation force. Pavement derived the maximum tensile stress, shear stress and elastic modulus, pavement thickness of mathematical models. The results showed that: Pavement maximum tensile stress, shear stress, pavement elastic modulus with available four times a polynomial equation fitted, pavement surface transverse maximum stress increases as the pavement thickness decreases, horizontal maximum shear stress between layers does not increase with the pavement thickness decreases, but the thickness of the pavement at 40-50mm have a peak, then gradually increases with the thickness decreases.

Analysis of Performance Decay Behavior for Asphalt Pavement Based on Aging

2013 ◽  
Vol 723 ◽  
pp. 22-26 ◽  
Author(s):  
Pei Long Li ◽  
Zhan Ding ◽  
Zheng Qi Zhang
Keyword(s):  
Shear Stress ◽  
Service Life ◽  
Tensile Stress ◽  
Simulation Analysis ◽  
Asphalt Pavement ◽  
Maximum Shear Stress ◽  
Maximum Tensile Stress ◽  
Pavement Structure ◽  
Analysis Of Performance ◽  
Decay Behavior

Aging is a main factor affecting the durability of asphalt pavement. To study decay behavior of asphalt pavement with aging, aged asphalt was extracted from stratified pavement mixtures for different service-life. The changes of asphalt properties with service time and depth variations of the pavement were discussed. And numerical simulation analysis of pavement structure was conducted with pavement gradient modulus changes caused by aging. The results indicate that asphalt stiffness increases and low-temperature performance decays sharply with the extension of pavement service life, especially in the first several years. The vertical aging differences from top to bottom of pavement were significant, the aging extents decrease continuously from the surface, which cause the gradient changes of pavement modulus. The maximum tensile stress and maximum shear stress all increase with surface modulus increasing, so more serious aging can induce greater gradient modulus, shear stress and tensile stress are larger under the same loads, which have more serious damage to the pavement structure.

scholarly journals Material and Structural Properties of Fiber-Reinforced Resin Composites as Thin Overlay for Steel Bridge Deck Pavement

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Hui Zhang ◽  
Chengqi Zhou ◽  
Kuan Li ◽  
Peiwei Gao ◽  
Youqiang Pan ◽  
...  
Keyword(s):  
Bridge Deck ◽  
Bending Strength ◽  
Failure Strain ◽  
Fiber Reinforcement ◽  
Bending Test ◽  
Steel Bridge ◽  
Fiber Reinforced ◽  
High Toughness ◽  
Epoxy Asphalt ◽  
Bridge Deck Pavement

Fatigue cracks are main damages to steel bridge deck pavement with thermosetting epoxy asphalt. By combining a high-toughness resin material with fiber woven fabrics, this study formed an ultrathin overlay of fiber-reinforced high-toughness resin to improve cracking resistance of pavement. Through theoretical measurement and bending test, this research studied change laws of bending and tensile properties of epoxy asphalt concrete after fiber reinforcement and analyzed bending strength and the maximum failure strain of beams at different temperatures. Moreover, the reinforcing effects of different fibers were discussed. It is found that bending strength, maximum failure strain, and stiffness modulus of the beams with epoxy asphalt are improved after fiber reinforcement. With the decrease of temperature, after fiber reinforcement, the mode of bending failure of the epoxy asphalt mixture (EAM) changes from brittle fracture into shear failure, accompanied with significant yield phenomenon. Furthermore, organic carbon fiber is sensitive to influences of temperature, while glass fiber is least sensitive to temperature.

Japan TAF Epoxy Asphalt Concrete Design and Steel Bridge Deck Pavement Construction Technology

2013 ◽  
Vol 330 ◽  
pp. 905-910 ◽  
Author(s):  
Cheng Zhu
Keyword(s):  
Asphalt Concrete ◽  
Bridge Deck ◽  
Steel Bridge ◽  
Construction Technology ◽  
Pavement Materials ◽  
Construction Methods ◽  
Epoxy Asphalt ◽  
Pavement Construction ◽  
Epoxy Asphalt Concrete ◽  
Bridge Deck Pavement

The TAF epoxy asphalt concrete (EAC) is a new steel bridge deck pavement materials , the application of the TAF EAC is increasing in China. But the research for some of it's performance and construction technology is not throughly, which results in the useful life of the bridge deck paving materials greatly reducing. This paper focuses on the design and construction methods of the Japanese TAF epoxy asphalt concrete, and take the Humen bridge steel bridge deck pavement repair project in December 2011 for example.

Effect of Interlayer on the Elastic-Plastic Deformation of Coating Systems

2019 ◽  
Vol 35 (3) ◽  
pp. 373-380 ◽  
Author(s):  
Y. X. Guo ◽  
Y. W. Zhao
Keyword(s):  
Shear Stress ◽  
Elastic Modulus ◽  
Yield Strength ◽  
Tensile Stress ◽  
Maximum Shear Stress ◽  
Indentation Load ◽  
Interlayer Thickness ◽  
The Finite Element Method ◽  
Thickness Increase ◽  
Elastic Plastic

ABSTRACTThe finite element method (FEM) was used to study the elastic-plastic contact in the coating systems with interlayer. The results reveal that with the increase of interlayer thickness, the maximum shear stress of coating/interlayer and interlayer/substrate interfaces decreases. Moreover, the sharply changed shear stress between the interfaces of coating/interlayer and interlayer/substrate decreases too. There is no further decrease when interlayer thickness increase to 0.04 mm and above. With the increasing of interlayer elastic modulus, the shear stress of coating/interlayer interface decreases while the shear stress of interlayer/substrate interface increases. Meanwhile, the higher elastic modulus leads to the intensive tensile stress concentration on the interface of coating/interlayer. Hence, the interlayer with appropriate elastic modulus not only reduces the shear stress of coating/interlayer and interlayer/substrate interfaces but also decreases the tensile stress of coating/interlayer interface. The mechanical properties of coating systems were investigated with different interlayer yield strength. The effective hardness and elastic modulus increase with the increase of interlayer yield strength, which is good to protect the substrate from the deformation. In addition, higher indentation load can lead to the decrease of effective hardness and elastic modulus.

Shear Stress Analysis of Long-Span Steel Bridge Deck Asphalt Pavement Using FEM

2011 ◽  
Vol 304 ◽  
pp. 12-17 ◽  
Author(s):  
Chun Hua Hu ◽  
Jin Qian
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Bridge Deck ◽  
Maximum Shear Stress ◽  
Element Model ◽  
Outer Side ◽  
Shear Stresses ◽  
Steel Bridge ◽  
Long Span ◽  
Peak Shear Stress

Asphalt pavements have been widely used to protect the steel bridge deck against moisture and provide good riding quality. However, various types of distresses especially rutting have been observed frequently in bridge deck asphalt layers. Therefore it is necessary to understand the mechanics behavior of asphalt layer in the steel bridge deck. In this paper, finite element model for bridge deck with asphalt layers have been setup. Then shear stresses have been analyzed in the various cases using finite element method. The results show that the most disadvantage position locates above the diaphragm plate outer side. The shear stress between layers decreases with the increase of the asphalt layer thickness, the peak shear stress increases either. The thin surface layer has its advantage with the requirement of the minimum paving thickness if bonding properly. Comparison with the common pavement structure, the maximum shear stress in the bridge deck pavement could be affected by the type of loading more significant.

scholarly journals Development and Laboratory Evaluation of a Cold Mix High-Early-Strength Epoxy Asphalt Concrete for Steel Bridge Deck Pavements

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4555
Author(s):  
Yang Liu ◽  
Zhendong Qian ◽  
Yongning Wang ◽  
Yongchao Xue
Keyword(s):  
Asphalt Concrete ◽  
Bridge Deck ◽  
Laboratory Evaluation ◽  
Steel Bridge ◽  
Epoxy Asphalt ◽  
Curing Period ◽  
Early Strength ◽  
Optimum Formula ◽  
Epoxy Asphalt Concrete ◽  
Bridge Deck Pavement

Epoxy asphalt concrete (EAC) is a widely used steel bridge deck pavement (SBDP) material. Due to the curing reaction, the EAC-based material needs a long curing period before opening to traffic, which in an inconvenience in the construction of SBDP. This study developed a cold mix high-early-strength (CHES) epoxy asphalt through the design of a compatilizer and curing agent system. The optimum formula of CHES epoxy asphalt was determined through a series of laboratory tests. By comparison of the performances of CHES EAC and some conventional EACs for SBDP, it was found that the developed CHES epoxy asphalt can significantly reduce the curing period, and the pavement performance of CHES EAC is, overall, excellent for application in SBDP. In addition, the sufficient allowable construction duration shows that the CHES EAC has a good construction workability.

scholarly journals Integrated Design of Structure and Material of Epoxy Asphalt Mixture Used in Steel Bridge Deck Pavement

Buildings ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 9
Author(s):  
Wen Nie ◽  
Duanyi Wang ◽  
Yangguang Sun ◽  
Wei Xu ◽  
Xiaoquan Xiao
Keyword(s):  
Asphalt Concrete ◽  
Bridge Deck ◽  
Asphalt Mixture ◽  
Strain Level ◽  
Steel Bridge ◽  
Plate Interface ◽  
Bonding Performance ◽  
Epoxy Asphalt ◽  
Epoxy Asphalt Concrete ◽  
Bridge Deck Pavement

To comprehensively investigate the integrated structural and material design of the epoxy asphalt mixture used in steel bridge deck pavement, the following works have been conducted: 1. The strain level of steel bridge deck pavement was calculated; 2. The ultimate strain level of fatigue endurance for epoxy asphalt concrete was measured; 3. The effect of water tightness of epoxy asphalt mixture on the bonding performance of steel plate interface was tested. 4. For better performance evaluation, quantitative analysis of the anti-skid performance of epoxy asphalt mixture was carried out by testing the structure depth using a laser texture tester. Results show the following findings: 1. The fatigue endurance limit strain level of epoxy asphalt mixture (600 με) was higher than that of the steel bridge deck pavement (<300 με), indicating that the use of epoxy asphalt concrete has better flexibility and can achieve a longer service life in theory; 2. The epoxy asphalt concrete has significant water tightness to protect the steel plate interface from corrosion and ensure good bonding performance; 3. The porosity of epoxy asphalt mixture used in steel bridge deck paving should be controlled within 3%; 4. In terms of anti-skid performance of bridge deck pavement, the FAC-10 graded epoxy asphalt mixture is recommended when compared with EA-10C.

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