玻璃纤维增强水泥复合板的力学性能

目的 研究一种新型的由玻璃纤维氯氧铗复合材料制作的大跨度箱形梁的力学性能,达到工程应用的良好效果.方法 对玻璃纤维氯氧镁复合材料以及由这种材料制作的大跨度箱形梁进行了实验研究,并用有限单元法对箱形梁的实验过程进行了模拟计算.结果 在实验加载过程中大跨度板没有出现裂纹以及大的变形情况,当均布载荷为0.75 kPa时,总的挠跨比仍保持在0.002以内,对比试验结果 与有限元分析结果 发现,这种箱型梁有很高的强度储备,满足规范要求.结论 板底面跨中节点荷载一挠度曲线接近线性关系,对比规范承载要求,所受应力在允许范围内具有较高的安全保证,对这种复合材料的应用和推广具有重要意义.

Study on Mechanical Properties of Glass Fiber Reinforced Cement Composite Plate

In order to achieve good results in the engineering application,the mechanical properties of a new kind of large-span box beam which is made by glass fiber magnesium oxychloride composites are studied in this paper.Some experiments were made for the composites and the large-span box beams made by this material.In the experimental process of loading,the large-span plate did not crack,nor did large deformation display.When the uniform load was 0.75,the total rate of deflection and span remained at less than 0.002.Comparing the results with the finite element analysis,we found this box had a high intensity and met regulatory requirements.The load-deflection curve of mid-span nodes in the bottom of plate is almost linear.Compared with standardized load requirements,it has high security assurance when subjected to the permitted stress,so this research has a great practical significance for the application and promotion of this composite material.