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Load Testing of Wood-Concrete Beams Incorporating Recycled Utility Poles.
| 题名： | Load Testing of Wood-Concrete Beams Incorporating Recycled Utility Poles. |
| 作者： | leborgne, m. r. gutkowski, r. m. |
| 关键词： | recycling, bridges, rural areas, design, mechanical tests, deflection, testing, research project |
| 摘要： | A wood-concrete composite bridge constructed of recycled utility poles is a potentially cost effective solution to repair a portion of the 108,647 rural bridges that have been deemed functionally obsolete or structurally deficient and have a span under thirty feet in length. This research project focuses on developing a design method for predicting the capacity of a composite longitudinal bridge deck section consisting of two utility poles topped with an interconnected concrete layer. The wood-concrete section is analyzed as a layered beam by using load and resistance factor design assuming the beam is fully composite. Adjustment factors are calculated to consider the additional mid-span stresses due to partially composite action. Full scale testing of the cast-in-place beams with a 29.52 ft. span was performed with service and ultimate loads as high as 12.22 kips and 37.98 kips, respectively. The highest composite efficiency of the wood-concrete beams was determined to be 96.4 percent. An empirical relationship for modeling the time-dependent deflection during the critical 28-day curing period of the wood-concrete beams was developed. / Supplementary Notes: Sponsored by Department of Transportation, Washington, DC. University Transportation Centers Program. / Availability Note: Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 总页数： | u0818；74p |
| 报告类型： | 科技报告 |
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