纤维加筋珊瑚砂特性及非共轴角计算模型 English Version
Characteristics and non-coaxial Angles Calculation Model of Fibre Reinforced Coral Sand
-
摘要: 为研究纤维加筋珊瑚砂的强度和变形性质，开展不同密实度和聚丙烯纤维掺量的珊瑚砂常规三轴试验和空心扭剪试验及非共轴角计算模型研究。结果如下：（1）相比素珊瑚砂，聚丙烯纤维珊瑚砂强度有显著提升，且最佳纤维掺量在0.3%左右，密实度为65%时纤维加筋珊瑚砂强度提升效果较好；（2）主应力轴旋转下，加筋珊瑚砂剪应变随密实度的增大而减小，旋转90°后珊瑚砂体积略微膨胀，非共轴角总体表现为先减小后增大的趋势，密实度越高，珊瑚砂共轴性越强；（3）建立了一种考虑共轴和非共轴耦合变形的纤维加筋珊瑚砂非共轴角计算模型，试验数据验证了纤维加筋珊瑚砂非共轴角计算模型的准确性。Abstract: To study the strength and deformation properties of fibre-reinforced coral sand, conventional triaxial and hollow torsional shear tests and non-coaxial computational modelling of coral sand with different densities and polypropylene fibre dosage were carried out. The results show that: (1) Compared with the coral sand, the strength of polypropylene fibre coral sand is significantly improved, and the best fibre doping is around 0.3%, and the strength of fibre-reinforced coral sand is better when the densification is 65%. (2) Under the rotation of the main stress axis, the shear strain of the reinforced coral sand decreases with the increase of compactness, and the volume of the coral sand slightly expands after the rotation of 90°, and the non-coaxial angle generally shows a tendency of decreasing and then increasing, and the higher the compactness is, the stronger the coral sand coaxiality is. (3) A non-coaxial angle calculation model of fibre-reinforced coral sand was established by considering the co-axial and non-coaxial coupling deformation, and the test data verified the accuracy of the non-coaxial angle calculation model of fibre-reinforced coral sand.
-
Keywords:
- Polypropylene Fiber /
- Coral sand /
- Non-coaxial Angles Calculation /
- Fibre content /
- Compactness
计量
- 文章访问数: 0
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
