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DYNAMIC PERFORMANCE OF COMPOSITE PAVEMENTS UNDER IMPACT.
| 题名： | DYNAMIC PERFORMANCE OF COMPOSITE PAVEMENTS UNDER IMPACT. |
| 作者： | Shoukry-SN; Martinelli-DR; Selezneva-OI |
| 关键词： | COMPOSITE-PAVEMENTS; DYNAMIC-ANALYSIS; VERTICAL-DISPLACEMENT; THREE-DIMENSIONAL; COMPUTER-GRAPHICS; ANIMATION-; BITUMINOUS-OVERLAYS; CONCRETE-PAVEMENTS; TIME-HISTORIES |
| 摘要： | The importance of developing a deep understanding of the behavior of pavement layers under the action of dynamic loads, and the availability of cutting-edge computational and visualization technologies, led to the study presented in this paper. Explicit finite-element analysis was used to investigate the propagation of dynamic displacements induced in pavement layers under the action of an impact load similar to the one applied in a falling weight deflectometer test. The time-dependent dynamic response of a rigid pavement with straight asphalt concrete overlay was studied for two cases of unbonded and fully bonded interfaces between different layers. Significant differences in behavior were observed. Three-dimensional computer graphics and animation of the deformed model were used to display the propagation of vertical dynamic displacements through pavement layers. It was found that in the absence of a perfect bond between all pavement layers, the displacements measured on the top surface correlated little with the deformation measured in subsequent layers. In this case, a complicated pattern of behavior took place between the asphalt overlay and the concrete. The time histories of vertical displacements at selected surface locations and on the top and bottom of every layer were plotted. The plots revealed the existence of time shifts between the maximum displacements experienced by each layer, irrespective of the type of bond assumed between the interfaces. |
| 总页数： | Transportation Research Record. 1997. (1570) pp163-171 (10 Fig., 2 Tab., 20 Ref.) |
| 报告类型： | 科技报告 |
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