PRESTRESSED FRP SHEETS FOR POSTSTRENGTHENING REINFORCED CONCRETE BEAMS
PRESTRESSED FRP SHEETS FOR POSTSTRENGTHENING REINFORCED CONCRETE BEAMS
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DOI：
10.1061/(asce)1090-0268(2001)5:4(214
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发表时间：
2001-11
影响因子：
4.6
通讯作者：
R. Wight;M. Green;M. Erki
中科院分区：
文献类型：
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作者：
R. Wight;M. Green;M. Erki
为研究预应力纤维布体外后加固的效果，进行了4根大型钢筋混凝土梁的试验研究。其中一根梁作为控制试件，另一根用非预应力碳纤维布加固，其余两根用预应力碳纤维布加固。本文介绍了碳纤维布多层预张拉的施工方法，以及碳纤维布多层预张拉梁在准静态荷载作用下的试验和分析结果。对控制梁、非预应力碳纤维布加固梁和预应力碳纤维布加固梁进行了对比分析。在理论预测梁的性能时考虑了正常使用和极限状态，包括多层预应力和外部荷载的影响。在混凝土梁受拉面粘贴预应力FRP片材，既提高了梁的使用性能，又改善了梁的受力性能。
Four large-scale reinforced concrete beams were constructed and tested to investigate the effectiveness of external poststrengthening with prestressed fiber reinforced polymer (FRP) sheets. One of the beams served as a control specimen, another was strengthened with nonprestressed carbon FRP sheets, and the remaining two were strengthened with prestressed carbon FRP sheets. Presented is a method of prestressing multiple layers of the carbon fiber sheets during the application process and the experimental and analytical behavior of the beams under quasi-static loading. Comparisons are made between the control beam, the beam reinforced with nonprestressed carbon FRP sheets, and the beams strengthened with prestressed sheets. Serviceability and ultimate conditions are considered in the theoretical prediction of beam behavior, including the effects of multiple layer prestressing and external loading. The bonding of prestressed FRP sheets to the tensile face of concrete beams improved both the serviceability a...