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Monitoring and Modeling of Pavement Response and Performance. Task B: New York. Volume 2: I86 PCC.
| 题名： | Monitoring and Modeling of Pavement Response and Performance. Task B: New York. Volume 2: I86 PCC. |
| 关键词： | monitor；modeling；forman；perform；oring；volume；resp；task；section；environmental |
| 摘要： | In Cattaraugus County, New York State, Interstate 86 exhibited major distresses, and the jointed reinforced portland cement concrete pavement (JRCP) and was in need of rehabilitation by 2004. Three experimental sections were constructed in June 2006 using an unbonded overlay of jointed plain concrete pavement (JPCP). In one section the existing JRCP was untreated, in another it was rubblized, and in the third section it was broken and seated (B&S). Embedded sensors monitored strain, temperature, and displacement responses. The research effort included periodic monitoring of stress and strains due to environmental loads and measurement of responses induced by a falling weight deflectometer (FWD) to account for dynamic loads. Results of this study suggest that thermal gradients in the concrete slabs induce highest vertical displacements (curling), strains, and stresses in the untreated section. From dynamic loads, the largest deflections and strains are induced in the rubblized and B&S sections, while the untreated section exhibits the least severe dynamic response. Environmental strain responses were typically more critical near the top surface of the concrete, often in tension, suggesting probable top-down cracking mechanisms. This research improves the understanding of the physical effects of these fracturing techniques on unbonded overlays through a fully monitored investigation using in-situ instrumentation. |
| 报告类型： | 科技报告 |
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