Internally Cured Concrete for Use in Concrete Pavement Using Accelerated Pavement Testing and Finite-Element Analysis

2016 ◽  
Vol 28 (6) ◽  
pp. 04016011 ◽  
Author(s):  
Kukjoo Kim ◽  
Thanachart Subgranon ◽  
Mang Tia ◽  
Michael Bergin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Concrete Pavement ◽  
Element Analysis ◽  
Accelerated Pavement Testing ◽  
Pavement Testing

Analysis of Factors Influence on Void Underneath at Concrete Pavement Joints

2014 ◽  
Vol 488-489 ◽  
pp. 483-486
Author(s):  
Fang Ran Zhao ◽  
Jia Lin Cao ◽  
Ning Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Load Transfer ◽  
Three Dimensional ◽  
Transfer Effect ◽  
Concrete Pavement ◽  
Element Analysis ◽  
Joint Stress ◽  
Transverse Joint ◽  
Dowel Bar

Three-dimensional finite element analysis was made on the transverse joint stress state of the concrete pavement slab with void underneath using ANSYS. The transfer effect of dowel bar was discussed with aircraft loaded in the joints. The influence rule of load transfer effect under different dowel bar spacing and dowel bar cross section dimension was compared. Based on the results of finite element analysis, this paper had carried on the experimental study on stress-transferring effect on concrete pavement joints with different location of the dowel bar. The influencing factors of pavement slab transverse joint with void underneath and the resistance of pavement damage on the joint was analyzed. Theoretical analysis showed that in order to reinforce the resistance capacity of local cavity on concrete pavement joint, the largest spacing of transverse dowel bar set shall not be more than 45cm, and the main factors influencing the resistance void ability on the joint are top reaction modulus, coefficient of cavity, the concrete elastic modulus and coefficient of transverse reinforcement.

scholarly journals Identification and detection of a void under highway cement concrete pavement slabs based on finite element analysis

2019 ◽  
Vol 34 (3) ◽  
pp. 41-47
Author(s):  
Tao Zhang ◽  
Yongming Ren
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Characteristic Curve ◽  
Acoustic Vibration ◽  
Concrete Pavement ◽  
Road Maintenance ◽  
Cement Concrete ◽  
Element Analysis ◽  
Vibration Method ◽  
Cement Concrete Pavement

For a city, the construction of a road is related to the development of economy, and the construction of a road includes maintenance of the road. Cement roads have been popularized in road construction due to their low construction cost and high strength, but at the same time, road problems have arisen. In order to solve and prevent the problem of voids under highway cement concrete pavement slabs, the acoustic vibration method was used for the detection of voids under highway cement concrete pavement slabs. This method was briefly introduced and analysed with finite element analysis. Then, excitation equipment and ABAQUS software were used to perform instance analysis on the section from K08-000 to K09-000 of G325 National Road. The results showed that there were three situations, including a mild void, normal void and serious void. The degree of abrupt change of the peak amplitude of the acoustic vibration characteristic curve increased with an increase in the severity of the void under the highway cement concrete pavement slabs. The void area was obtained through calculation of the sound pressure characteristic curve data based on the finite element model, with an error between 17.0 and 21.9%. However, in road maintenance projects, this error is acceptable. In summary, the acoustic vibration method based on finite element analysis can effectively detect the position of a void under highway cement concrete pavement slabs and estimate the area.

Performance Evaluation of Concrete Pavement Slab Considering Creep Effect by Finite Element Analysis

2018 ◽  
Vol 2672 (27) ◽  
pp. 65-77
Author(s):  
Siming Liang ◽  
Ya Wei ◽  
Zehong Wu ◽  
Will Hansen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Performance Evaluation ◽  
Concrete Pavement ◽  
Concrete Slabs ◽  
Total Stress ◽  
Element Analysis ◽  
Creep Effect ◽  
Flexural Creep ◽  
Warping Stress

Creep, as an intrinsic property of concrete material, will inevitably affect the performance of concrete pavement slabs in the field. However, the creep effect on the performances of concrete pavement slabs is far from being fully investigated. In this study, a test set-up is designed to measure the flexural creep of concrete beams exposed to both sealed and drying conditions. The measured flexural creep results are then modeled by the microprestress–solidification theory-based creep model which is incorporated into finite element analysis to evaluate numerically the creep effect on the moisture warping deformation, warping stress, and the total stress under traffic load in concrete slabs. Parameters including slab size, slab thickness, and subgrade modulus are considered. It is found that concrete creep has a significant effect on slab performance. Based on the measured creep properties in this study, the warping deformation of slabs can be reduced by 8–62%, and the warping stress and the total stress can be relaxed by at least 50%. Therefore, it is of importance to incorporate creep effect in analyzing warping deformation and stress generated in concrete pavement slabs. This study also provides a numerical methodology to the current performance evaluation of concrete slabs in the field.

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