Joint Load-Transfer Prediction Model Considering Dowel-Bar Position Deviation in Rigid Pavements

2015 ◽  
Vol 9 (3) ◽  
pp. 20-26
Author(s):  
Yan-cong Zhang ◽  
Ling-ling Gao
Keyword(s):  
Prediction Model ◽  
Load Transfer ◽  
Rigid Pavements ◽  
Joint Load ◽  
Dowel Bar

Development of Prediction Model for Doweled Joint Concrete Pavement Using Three-Dimensional Finite Element Analysis

2014 ◽  
Vol 587-589 ◽  
pp. 1047-1057 ◽  
Author(s):  
How Bing Sii ◽  
Gary W. Chai ◽  
Rudi Van Staden ◽  
Hong Guan
Keyword(s):  
Prediction Model ◽  
Group Action ◽  
Shear Force ◽  
Load Transfer ◽  
Nodal Point ◽  
Three Dimensional ◽  
Load Testing ◽  
Element Analysis ◽  
Three Dimensional Finite Element ◽  
Dowel Bar

The load transfer mechanism between the dowel and the concrete is a complex phenomenon. This mechanism depends mainly on a parameter known as the modulus of dowel support (K), the value of which can be determined by load testing. A high modulus of dowel support value indicates a good contact between the concrete and the steel dowel. There is a lack of sound approach to identify with any degree of accuracy the modulus of dowel support (k), which makes it difficult to rely on the analytically developed formulas that are sensitive to its value. The obtained numerical results were validated with classical analytical solutions of shear and moment along the dowel. The group action of the dowel bar system was examined and useful relationships have been developed for estimation of the relative load shared by individual dowel bars. These useful relationships have been used to developed prediction Model to predict the shear force in dowel group action of dowel bar system and deflection at the loading nodal point. The prediction Model results for shear force in dowel group action of dowel bar system and deflection at the loading nodal point were relatively close to the F.E. Model results, with the different range between 2.2% to 7%.

Research on the Working Performance of Dowel Bar during Horizontal Installation Errors

2012 ◽  
Vol 166-169 ◽  
pp. 441-449
Author(s):  
Peng Peng ◽  
Bo Tian ◽  
Kai Min Niu
Keyword(s):  
Surface Treatment ◽  
Load Transfer ◽  
Control Measures ◽  
Angular Deviation ◽  
Bending Fatigue ◽  
Cement Concrete Pavement ◽  
Medium Level ◽  
Working Performance ◽  
Joint Load ◽  
Dowel Bar

Through the pullout test on dowel bar of different surface treatment modes and position deviation, the paper draws the conclusion that the plastic spraying treatment in different surface treatment modes can maximum meet the setting requirements of dowel bar, and the angular deviation of the dowel bar is the main reason for the cracking within the 50 centimeters of both sides of cement concrete pavement joint; Through the bending fatigue test, the paper evaluates the attenuation law of joint load transfer capacity under different horizontal installation error conditions(0°, 5°, 10° and 15°), and find that with the increase of dowel bar deviation angle, the initial joint load transfer capacity presents a rapid downward trend, and the performance of whole working period become worse and worse, when the angular deviation of dowel bar in the horizontal plane is not more than 5°, juncture load transfer capacity can still remain the medium level, which will not have too much influence on the working performance of dowel bar. Finally, the paper presents the looseness of dowel bar after 800,000 times of bending fatigue, and puts forward the control measures to avoid position deviation of dowel bar.

Component Dowel-Bar Model for Load-Transfer Systems in PCC Pavements

1995 ◽  
Vol 121 (3) ◽  
pp. 289-298 ◽  
Author(s):  
Hua Guo ◽  
James A. Sherwood ◽  
Mark B. Snyder
Keyword(s):  
Load Transfer ◽  
Dowel Bar

Development of Dowel Looseness Prediction Model for Jointed Concrete Pavements

1996 ◽  
Vol 1525 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Neeraj Buch ◽  
Dan G. Zollinger
Keyword(s):  
Prediction Model ◽  
Load Transfer ◽  
Laboratory Data ◽  
Fault Prediction ◽  
Transfer Efficiency ◽  
Oxide Content ◽  
Concrete Pavements ◽  
Bearing Stress ◽  
Load Transfer Efficiency ◽  
Jointed Concrete Pavements

The results of an in-depth study of factors that affect dowel looseness in jointed concrete pavements are presented. The laboratory investigation revealed the influence of aggregate type (in relation to oxide content), aggregate texture and shape, bearing stress (dowel diameter and crack width), load magnitude, and number of load cycles on the magnitude of dowel looseness and the subsequent loss in load transfer efficiency across saw-cut joints. A discussion is included on the development of an empirical-mechanistic dowel looseness prediction model based on the experimental results. Results of the sensitivity analysis of the dowel looseness prediction model (using laboratory data) are also presented. An associated scope of this research was to develop a relationship between dowel looseness and loss of load transfer efficiency. The sequential use of the dowel looseness prediction model and its relationship to load transfer efficiency allows the design engineer to predict load transfer characteristics of a joint, based on calculated (or measured) dowel looseness. The framework suggested to predict dowel looseness can then be incorporated into a fault prediction model for doweled joints.

scholarly journals A Rapid Detection Method for Bridges Based on Impact Coefficient of Standard Bumping

2018 ◽  
Vol 2018 ◽  
pp. 1-14
Author(s):  
Xiaolan Liu ◽  
Xianmin Zhang ◽  
Yadong Wang
Keyword(s):  
Finite Element ◽  
Elastic Modulus ◽  
Evaluation Method ◽  
Load Transfer ◽  
Amplitude Ratio ◽  
Load Test ◽  
Transfer Efficiency ◽  
Mountain Areas ◽  
Load Transfer Efficiency ◽  
Dowel Bar

The evaluation method of load transfer efficiency using falling weight deflectometer is unworkable in remote mountain areas and transportation difficult region. Therefore, a novation method of load transfer efficiency evaluation is proposed using the index of amplitude ratio. Finite element method is applied to study the influence of dowel bar parameters (diameter, length, spacing, and elastic modulus) and pavement structures parameters (thickness and modulus) on load transfer efficiency, frequency, and the ratio of amplitude. Results of finite element model show that the effects of dowel bar and pavement structure parameters on load transfer efficiency and the ratio of amplitude are similar. The load transfer efficiency, frequency, and the ratio of amplitude enhance with the increase of dowel bar diameter, length, and elastic modulus and the decrease of dowel bar spacing. The subgrade modulus has more significant influence on the load transfer efficiency, frequency, and the ratio of amplitude than other pavement parameters. Polynomial function method is utilized to established load transfer mode between deflection-based load transfer efficiency and the ratio of amplitude. The feasibility and reliability of new method is verified by static and dynamic load test. All results are helpful for the development of highway engineering and airport engineering.

Performance of Dowel Bar Retrofitted Concrete Pavement Under Heavy Vehicle Simulator Loading

2003 ◽  
Vol 1823 (1) ◽  
pp. 141-152 ◽  
Author(s):  
John T. Harvey ◽  
Lorina Popescu ◽  
Abdikarim Ali ◽  
David Bush
Keyword(s):  
Load Transfer ◽  
Heavy Vehicle ◽  
California Department ◽  
Accelerated Pavement Testing ◽  
Control Section ◽  
Vehicle Simulator ◽  
Pavement Testing ◽  
Load Transfer Efficiency ◽  
Dowel Bar ◽  
Heavy Vehicle Simulator

The California Department of Transportation uses dowel bar retrofit (DBR) as a rehabilitation strategy for concrete pavements. Two test sections were retrofitted with dowel bars and a third section was designated as a control on US-101 near Ukiah, California. All three sections were subjected to accelerated pavement testing by using the Heavy Vehicle Simulator (HVS). The results obtained with the HVS demonstrated a large improvement in load transfer efficiency (LTE) and decreases in maximum vertical deflections and vertical deflection differences from DBR. LTE was not damaged by trafficking on the sections with DBR and was less sensitive to temperature changes than the control section. Falling weight deflectometer testing showed damage to the interlock at the joint on the control section and no damage on the sections with DBR. Joint and crack deflections and deflection differences increased with trafficking. A total equivalent loading of approximately 11,000,000 equivalent single-axle loads was applied to each of the sections with DBR without failure occurring.

Foundation Modeling for Jointed Concrete Pavements

2000 ◽  
Vol 1730 (1) ◽  
pp. 34-42 ◽  
Author(s):  
William G. Davids
Keyword(s):  
Finite Element ◽  
Temperature Gradient ◽  
Load Transfer ◽  
Plain Concrete ◽  
Positive Temperature ◽  
Concrete Pavements ◽  
Finite Element Program ◽  
Joint Load ◽  
Foundation Type ◽  
Dense Liquid

Issues related to the finite element modeling of base and subgrade materials under jointed plain concrete pavements are examined. The threedimensional finite element program EverFE, developed in conjunction with the Washington State Department of Transportation, was employed for the analyses. The relevant modeling capabilities of EverFE are detailed, including the ability to model multiple foundation layers, the incorporation of loss of contact between slab and base, and the efficient iterative solution strategies that make large three-dimensional finite element analyses possible on desktop computers. The results of parametric studies examining the effects of foundation type (layered elastic and dense liquid) and properties on the response of jointed plain concrete pavements subjected to axle and thermal loads are presented. Special attention is paid to the interactions between joint load transfer effectiveness and foundation type, and joint load transfer is shown to change significantly with different foundation models and properties. A consideration of simultaneous thermal and axle loadings indicates that the effect of foundation type and properties on critical slab stresses caused by edge loading and a positive temperature gradient is relatively small. However, the slab response is quite sensitive to foundation type for a combined negative temperature gradient and corner loading. On the basis of these results, use of an equivalent dense liquid foundation modulus in mechanistic rigid pavement analysis or design is not recommended when stiff base layers are present.

Relative Costs of Various Concrete Pavement Features

1997 ◽  
Vol 1574 (1) ◽  
pp. 99-102 ◽  
Author(s):  
Lawrence W. Cole ◽  
Michael J. Hall
Keyword(s):  
Load Transfer ◽  
Relative Effect ◽  
Careful Consideration ◽  
Concrete Pavement ◽  
Thickness Variation ◽  
Portland Cement Concrete ◽  
Joint Spacing ◽  
Transverse Joint ◽  
Pavement Construction ◽  
Joint Load

The design and construction of portland cement concrete pavement involves the selection, specification, and construction of a number of concrete pavement features. Concrete pavement features can significantly affect pavement construction costs. In this study, the relative effect on pavement construction cost of several concrete pavement features was investigated, including concrete pavement thickness, foundation, shoulders, cross-section thickness variation (trapezoidal section), joint spacing, transverse joint load transfer, and transverse joint sealant. Careful consideration and study should be given the cost effects of various features when designing and specifying concrete pavement. The ideal pavement design is one that selects the least costly pavement section that will perform to the expected level over the life of the facility. The least costly pavement section is that with the least life-cycle costs.

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