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CONSTRUCTION AND MONITORING OF POST-TENSIONED MASONRY SOUND WALLS.
| 题名： | CONSTRUCTION AND MONITORING OF POST-TENSIONED MASONRY SOUND WALLS. |
| 作者： | Woodham-DB |
| 关键词： | Creep-; Masonry-construction; Monitoring-; Noise-barriers; Posttensioning-; Prestress-loss; Relaxation-Mechanics; Shrinkage-; Tendons-Materials |
| 摘要： | Prestressed masonry offers a competitive alternative to conventionally reinforced masonry and reinforced concrete in certain applications. While prestressed masonry is a commonly accepted form of construction in Europe, it has seen very little use in the U.S. This is mostly due to the lack of building code provisions for building officials, design guidance for design professionals, commercially available hardware, and construction experience for contractors. The purpose of this project was to document the installation of a post-tensioned concrete masonry sound wall constructed as part of a widening and sound wall project along US 36 near Denver, Colorado. In addition, the wall was instrumented at the time of construction to monitor the loss in prestress in the steel tendons over time due to concrete masonry creep and shrinkage and steel relaxation. Tendon tension was monitored for one year to obtain values for the accumulated losses. Accurate losses in post-tensioned concrete masonry are important for economical design. Currently, there are limited data to support an accurate prediction of prestress loss in concrete masonry. Because of the limited experience from this project, study panel members did not deem a full implementation of this construction method was justifiable. However, further experimentation with prestressed masonry sound walls will be explored on projects in the future to confirm findings from this research work. |
| 总页数： | 2001/12. pp22 (Phots., Figs., 4 Tab., Refs.) |
| 报告类型： | 科技报告 |
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