FRP增强胶合木梁弯曲变形的解析分析

在胶合木梁的受拉区设置纤维增强复合材料(FRP)是提高胶合木(glulam)梁结构性能的有效方法。通过力学模型分析,给出了FRP glulam简支梁变形的解析解。根据相关的力学机理并结合试验数据,对解析解进行了修正;修正系数是通过对某些参数进行回归分析得到的,将其与已有的试验结果进行对比,证实了模型具有较高精度,可以很好地模拟梁的全过程变形与刚度变化。此外,模型还广泛适用于多种常见简支梁的变形分析或刚度分析。

Analysis study on flexural deflection of FRP reinforced glulam beams

To set fiber reinforced polymer/plastic(FRP) composite in tensile region of glued laminated timber(glulam) beams is effective measure to improve structural behaviors.By the analysis of mechanic model,the analytical solutions on the deflection of simply supported FRP-glulam beams are presented in this paper.According to corresponding flexural mechanism and experiment results,a modification was made upon the analytical solutions.The modified coefficient is based on regression analysis of some parameters.Comparing with experiment data,the high accuracy of the presented model is confirmed,and this model can simulate the whole process deformation and stiffness variation.In addition,the model has its extensive use to analyse deformation or stiffness of many kinds of normal simply supported beams.