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Reliability Based Rating Procedure for Concrete Slab Bridges Using Field Testing; Final rept
| 题名： | Reliability Based Rating Procedure for Concrete Slab Bridges Using Field Testing; Final rept |
| 作者： | Aziznamini, A.; Keeler, B.; Choobineh, F.; Mans, P.; Luedke, J. |
| 关键词： | Highway bridges; Trucks; Weight; Ratings; Reinforced concrete; Field tests; Concrete slabs; Tests; Numerical analysis; Reliability |
| 摘要： | Concrete slab bridges are short span bridges that are found in the thousands in both state and county inventories. A majority of these bridges are three-span continuous and were constructed during the years when H15 AASHTO truck loads were used as the designed vehicle load. The problem occurs when these bridges are required to carry higher traffic loads, such as AASHTO HS20 design truck loads, which are 72,000 pounds. An extensive investigation to comprehend the behavior of concrete slab bridges and develop a state of the art method of rating them was conducted at the University of Nebraska-Lincoln between 1991 and 1997. This report summarizes the entire investigation, which was carried out in two phases. The experimental work included testing 12 concrete slab bridges in the field and constructing and testing of a 1/4 scale three span bridge in the laboratory. One slab bridge was tested to collapse in the field. Experimental data were used to develop a reliable procedure to carry out three dimensional analysis of concrete slab bridges. Information gained from conducting experimental and numerical analysis were used to develop a state of the art method to rate concrete slab bridges using probabilistic approach. Results of this investigation indicate that concrete slab bridges have large reserve capacities, including those originally designed for H15 loads, and most of these bridges could carry modern traffic loads. |
| 总页数： | 700p |
| 报告类型： | 科技报告 |
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