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通过对9根矩形截面木梁的受弯静力试验,进行了玻璃纤维布(GFRP)加固木梁抗弯性能的研究,分析了加固梁的承载力、挠度等结构性能。试验结果表明,在木梁受拉区粘贴GFRP是提高木梁抗弯性能的有效方法。针对木梁的几种破坏现象,对加固木梁的破坏方式的界限破坏形态进行了分析,推导出GFRP加固矩形木梁抗弯极限承载力的计算公式。将计算结果与试验结果进行了比较,两者吻合良好。
Through the bending static test of nine rectangular cross-section wooden beams, the flexural properties of GFRP-reinforced wooden beams were studied, and the structural performance of the reinforced beams such as bearing capacity and deflection was analyzed. The test results show that the application of GFRP in the tension zone of the wooden beam is an effective method to improve the bending performance of the wooden beam. In view of several kinds of damage phenomenon of the wooden beam, the demarcation failure mode of the reinforced wooden beam is analyzed, and the formula of flexural ultimate capacity of GFRP reinforced rectangular beam is derived. The calculated results and the experimental results were compared, both agree well.