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首页> 外文期刊>International journal of steel structures >Using locally pre-stressed reinforcing bars to restore the capacity of severely damaged steel beams
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Using locally pre-stressed reinforcing bars to restore the capacity of severely damaged steel beams

机译：使用局部预应力钢筋恢复严重受损的钢梁的能力

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摘要

This paper investigates the behaviour of damaged steel beams repaired using locally pre-stressed reinforcing steel bars. Regular reinforcing bars are welded to the beam's web at both ends and then pretensioned using a manual screw jack to increase the effectiveness of the repair. Six beams with different bar diameters and levels of pre-stress were repaired and tested under three-points bending. Results showed that the level of pre-stress controlled the beams' stiffness, while restoration of their ultimate load-carrying capacity was governed by the bar size. Significantly higher repaired capacities were achieved by this method than by other published methods used for the strengthening of steel beams.
机译：本文研究了使用局部预应力钢筋修复的受损钢梁的行为。将规则的钢筋两端焊接到梁的腹板上，然后使用手动螺旋千斤顶预紧，以提高修复效果。修复了具有不同钢筋直径和预应力水平的六根梁，并在三点弯曲下对其进行了测试。结果表明，预应力水平控制梁的刚度，而梁的最终承载能力的恢复则受钢筋尺寸的控制。通过这种方法获得的修复能力明显高于通过其他已发布的用于加固钢梁的方法。

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