FRP增强胶合木梁的受弯性能研究

被引：65

作者：

杨会峰

刘伟庆

机构：

[1] 南京工业大学土木工程学院

来源：

建筑结构学报 | 2007年 / 01期

关键词：

胶合木梁; 纤维增强复合材料(FRP); 理论分析; 试验研究; 受弯极限承载力;

D O I：

10.14006/j.jzjgxb.2007.01.010

中图分类号：

TU366.2 [木结构];

学科分类号：

081304 ; 081402 ;

摘要：

对FRP（fiber reinforced plastics/polymer）增强胶合木梁的受弯性能做了详细研究。通过试验分析了构件的破坏形态与破坏机理,对比分析了FRP增强胶合木梁与未增强梁的极限荷载与抗弯刚度等受弯性能。试验结果表明FRP增强杨木胶合木梁相对于未增强梁,受弯极限承载力提高了18%63%,刚度提高了32%88%,当配筋率为1.0%左右时,FRP增强杨木胶合木梁的受弯承载力与刚度分别可达到常用松木实木构件的1.82倍和1.35倍,并且增强构件的破坏形式大多表现为塑性受压破坏。基于力学模型分析,提出了粘结界面粘结剪应力、截面中性轴位置、FRP板拉力、受拉面层破坏荷载和极限荷载等的计算公式;然后将理论分析结果与现有的大量试验结果进行了对比,结果表明,模型精度较高,能够较好地预测FRP增强胶合木梁的受弯性能,可为此类结构构件的加工设计与工程应用提供参考。

引用

页码：64 / 71

页数：8

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