| 摘要: |
| 以能量耗散系数为材料阻尼性能的评价指标,运用循环加载试验研究CA砂浆的能量耗散系数随加载应力、加载频率和试验温度的变化规律,结合CA砂浆的阻尼特性,提出CA砂浆阻尼的评价方法。结果表明:CA砂浆的能量耗散系数不随应力的变化出现明显变化,大致保持在13％～15％;随着加载频率的增加,CA砂浆能量耗散系数先快速降低、后变化趋缓;随着温度的增大,能量耗散系数在低频加载下增加较大,在高频加载下增加较小。 |
| 关键词: CA砂浆 阻尼性能 能量耗散系数 评价方法 |
| DOI：10.3969/j.issn.1673-5005.2013.04.028 |
| 分类号::U 214.01 |
| 基金项目:国家自然科学基金项目(51078114) |
|
| Damping capacity of type CRTS-Ⅱ cement asphalt(CA) mortar |
|
WANG Jin-feng1, OUYANG Jian2, ZHAO Jiu-ye2, TAN Yi-qiu2, LI Yun-liang2
|
|
(1.China Offshore Oil ﹠ Gas Development ﹠ Utilization Company, Beijing 100029, China;2.School of Transportation Science and Engineering in Harbin Institute of Technology, Harbin 150090, China)
|
| Abstract: |
| In order to study damping characteristics of cement asphalt mortar (CA mortar), by taking energy dissipation coefficient as the evaluation index of material 's damping capacity, the variation laws of energy dissipation coefficient of CA mortar with loading stress, loading frequency, and test temperature were studied through cycle loading test. An evaluation method for the damping capacity of CA mortar was proposed considering the damping characteristics of CA motor. The results show that the energy dissipation coefficient of CA mortar is relatively stable with the change of loading stress, varying from 13% to 15%. With the increase of loading frequency, the energy dissipation coefficient of CA mortar declines sharply before achieving steady state. With the increase of test temperature, the energy dissipation coefficient of CA mortar increases a lot at low loading frequency but increases a little at high loading frequency. |
| Key words: CA mortar damping capacity energy dissipation coefficient evaluation method |
