粘贴竹板抗弯加固木梁的试验研究

Experimental study on timber beams flexural strengthened with bamboo plates

对采用竹板加固的7根木梁进行了对比试验研究,其中3根为对比试件,4根为粘贴竹板加固木梁试件。研究结果表明:在梁底粘贴竹板加固后,木梁受弯承载力可提高71%～93%,平均提高83%;初始弯曲刚度平均提高58%;破坏位移平均增加62%;加固木梁跨中截面仍基本符合平截面假定。可见,粘贴竹板加固木梁可大范围推广。

The comparative experimental study on 7 timber beams were tested,including 3 reference timber beams and 4 timber beams strengthened with bamboo plates.The test results show that the flexural capacity of timber beams increases by 71%~93%（with an average value of 83%） after strengthened by bamboo plates.The initial stiffness and the ultimate displacement of the strengthened beams also significantly increase by 58% and 62% on average,respectively.The middle-span section of the strengthened timber beams is also in accord with the plane cross-section assumption.This study has shown that strengthening timber beams with bamboo plates is a very promising low-carbon and convenient technique.