【摘要】 材料的阻尼是衡量材料本身减振性能的主要指标 ,采用自由振动法测试得到了一批聚丙烯纤维混凝土小变形阻尼比的基础性数据。试验结果表明 :所采用的阻尼比测试方法和试验过程是可靠的 ;混凝土的阻尼比随聚丙烯纤维掺量的增加变化不大 ;混凝土的弹性模量随聚丙烯纤维掺量的增加而降低。更多还原

【Abstract】 Damping ratio is the main index representing the property of materials in reducing vibration.Free vibration method is employed to measure the damping ratio.A batch of fundamental data for the damping ratio of polypropylene fibre concrete in small deformation is obtained.The analyses of experimental results conclude that the testing method and procedure for damping ratio are reliable;for concrete in the same class,the damping ratio changes slightly with increasing polypropylene fibre;and Young’s modulus decreases with increasing polypropylene fibre.更多还原