Numerical Simulation of Mechanical Properties of Asphalt Mixture Bridge Deck Pavement Based on Virtual Reality

2020 ◽  
Author(s):  
Wang Qiu-Yun
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Virtual Reality ◽  
Bridge Deck ◽  
Asphalt Mixture ◽  
Bridge Deck Pavement

scholarly journals Interlaminar Bonding Properties on Cement Concrete Deck and Phosphorous Slag Asphalt Pavement

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1427 ◽  
Author(s):  
Guoping Qian ◽  
Shunjun Li ◽  
Huanan Yu ◽  
Xiangbing Gong
Keyword(s):  
Bridge Deck ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Fine Aggregate ◽  
Cement Concrete ◽  
Bonding Properties ◽  
The Impact ◽  
Phosphorous Slag ◽  
Bridge Deck Pavement ◽  
Concrete Deck

The slippage damage caused by weak interlaminar bonding between cement concrete deck and asphalt surface is a serious issue for bridge pavement. In order to evaluate the interlaminar bonding of cement concrete bridge deck and phosphorous slag (PS) asphalt pavement, the shear resistance properties of the bonding layer structure were studied through direct shear tests. The impact of PS as a substitute of asphalt mixture aggregate, interface characteristics, normal pressure, waterproof and cohesive layer types, temperature and shear rate on the interlaminar bonding properties were analyzed. The test results indicated that the interlaminar bonding of bridge deck pavement is improved after asphalt mixture fine aggregate was substituted with PS and PS powder, and the result indicated that the shear strength of grooved and aggregate-exposed interfaces is significantly higher than untreated interface, the PS micro-powder or anti-stripping agent can also improve the adhesion between layers when mixed into SBS asphalt. This study provided important theoretical and practical guidance for improving the shear stability of bridge deck pavement.

Design and Study of Multi-Function Asphalt Mixture Shear Apparatus

2010 ◽  
Vol 97-101 ◽  
pp. 2397-2402
Author(s):  
Tao Zhang ◽  
Yang Liang ◽  
Nan Yao
Keyword(s):  
Asphalt Concrete ◽  
Shear Force ◽  
Bridge Deck ◽  
Asphalt Mixture ◽  
Data Acquisition System ◽  
Concrete Surface ◽  
Uniform Loading ◽  
Experimental Parameters ◽  
Asphalt Concrete Pavement ◽  
Bridge Deck Pavement

The shear force created by non-uniform loading on the asphalt and concrete surface is the main reason why bridge deck pavement is damaged extensively. Multi-function asphalt mixture shear apparatus is designed for dealing with this problem. After studying the composition of mechanical system and data acquisition system, design and develop the program of the system. During the study, the actual prototype is produced, and used in the asphalt mixture shear experiment. The experimental parameters can help the design of asphalt mixture and the prevention of the damage of asphalt concrete pavement.

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.

Research on Crack Property of Concrete Based on Fracture Mechanics

2010 ◽  
Vol 160-162 ◽  
pp. 1699-1703
Author(s):  
Wei He ◽  
Rong He ◽  
Heng Xiang Zheng
Keyword(s):  
Numerical Simulation ◽  
Stress State ◽  
Fracture Mechanics ◽  
Field Test ◽  
Bridge Deck ◽  
Equivalent Stress ◽  
Simulation Method ◽  
Critical Value ◽  
Fracture Angle ◽  
Bridge Deck Pavement

The type of I-II compound crack in bridge deck pavement is most popular. Based on the theory of fracture mechanics the least equivalent stress method is put forward and used to study the problem of concrete cracks. The method could be used to determine the fracture angle of I-II compound crack. For the cracked deck pavement, the stress state could be determined by field test or numerical simulation method and then calculate the equivalent stress near the point by Matlab. The examples show that when the equivalent stress gets to the critical value the crack will develop along fracture angle which could be calculated from the least equivalent stress method. The theory value of fracture angle is basically accurate with the test one.

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