Open AccessJournal Article
Dynamic finite-element analysis of jointed concrete pavements
TL;DR: In this article, a new dynamic finite-element computer program, DYNA-SLAB, for the analysis of jointed concrete pavements subjected to moving transient loads is presented.
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Abstract: A new dynamic finite-element computer program, DYNA-SLAB, for the analysis of jointed concrete pavements subjected to moving transient loads is presented. The dynamic solution is formulated in both the time and the frequency domains. The structural model for the slab system is the one used in the static computer program ILLI-SLAB. The foundation support is represented by either a damped Winkler model with uniformly distributed frequency-dependent springs and dashpots or a system of semi-infinite horizontal layers resting on a rigid base or a semi-infinite half-space. An important contribution from the study is a new analytical method for determining the stiffness and damping coefficients to be used in the Winkler foundation model. The accuracy of DYNA-SLAB has been verified by comparing the results produced by the program with those from theoretical closed-form solutions and from a powerful dynamic soil-structure interaction computer program called SASSI as well as with field data. The analytical results indicate that dynamic analysis is generally not needed for the design of rigid pavements and that it usually leads to decreased pavement response. Thus, it appears that a quasistatic analysis is sufficient and that the results from this type of analysis will generally be conservative, provided that the wheel loads used in the analysis have been adjusted for the effects of vehicle velocity, truck suspension characteristics, and pavement roughness.
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Citations
Dynamic Response of Concrete Pavements under Vehicular Loads
Mostafa Yousefi Darestani,David Thambiratnam,Daksh Baweja,Andreas Nataatmadja +3 more
- 01 Jan 2006
TL;DR: In this paper, a 3D finite element analysis using diverse axle groups with different speeds from 2 km/h to 110km/h has been performed on two pavement types namely, jointed plain concrete pavement and jointed reinforced concrete pavement.
Development of Embedded Bending Member to Model Dowel Action
TL;DR: In this article, the stiffness matrix of the embedded dowel element is expressed as a transformation of the unembedded dowel elements stiffness matrix, eliminating the need for special integration techniques, and the results of these studies demonstrate the applicability of the element as well as indicating the potential for significant detrimental effects on doweled joint performance when gaps exist between the dowels and the pavement slabs.
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Patent
Method of computing energy loss generated in viscoelastic material and method for evaluating energy loss of golf ball by using method of computing energy loss
Kazuyoshi Miyamoto,Masaki Shiraishi +1 more
- 09 Oct 2003
TL;DR: In this article, a method of computing an energy loss generated in a viscoelastic material, comprising the steps of analyzing a dynamic behavior of a to-be-analyzed object composed of the viscous material by a numerical analysis method, is presented.
22
Significance of subgrade damping on structural evaluation of pavements
Chen Ming Kuo,Ting Yi Tsai +1 more
TL;DR: In this article, the authors presented the pavement responses of finite element analysis of FWD tests on various types of subgrade soils and found that subgrade damping significantly influences pavement deflections.
20
Structural Response of Concrete Pavements under Moving Truck Loads
TL;DR: In this paper, a test section consisting of two jointed reinforced concrete pavement and two plain (unreinforced) concrete pavement was constructed and tested under both quasistatic and dynamic truck loads.
References
Basis for derivation of matrices for the direct stiffness method
TL;DR: In this article, the authors reviewed previous developments in the direct stiffness method and the advantages of extending the definitions to make the method a variational approach are cited, and explicit requirements of potential energy displacements are presented, and a criterion insuring monotonic convergence is developed.
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