| 郭超,陆征然,侯世伟,于红梅.重载交通下CTCP-CRCP复合路面振动试验研究[J].,2018,58(5):500-504 |
| 重载交通下CTCP-CRCP复合路面振动试验研究 |
| Experimental study of vibration of CTCP-CRCP composite pavement under heavy traffic |
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| DOI：10.7511/dllgxb201805009 |
| 中文关键词: 道路工程 路面振动 加速度测试 复合路面 |
| 英文关键词: road engineering pavement vibration acceleration test composite pavement |
| 基金项目:辽宁省自然科学基金资助项目(20170540741). |
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| 中文摘要: |
| 对由斜向交叉缓黏结预应力混凝土上面板(CTCP)、沥青砂应力吸收层、连续配筋混凝土下面板(CRCP)组成的“三明治”式复合路面结构在不同重载车辆冲击下的加速度反应进行试验研究．首先，利用埋设的加速度计，分别测试了在轴载为100、200、300 kN的重载车辆冲击下CTCP和CRCP的加速度反应谱，并采用CTCP和CRCP加速度比值的统计均值作为沥青砂应力吸收层的应力吸收因数．然后，对上述3组加速度反应谱进行傅里叶变换，获得频率谱．试验结果表明：在上述3组重载车辆冲击作用下，CTCP加速度最大峰值分别为0.022、0.039、0.059 m·s-2，CRCP加速度最大峰值分别为0.010、0.015、0.025 m·s-2，沥青砂应力吸收层应力吸收因数分别为3.15、3.38、3.46．该结果表明“三明治”式复合路面结构中沥青砂应力吸收层能有效缓解重载车辆对路面的冲击，适合在重载交通中应用． |
| 英文摘要: |
| The acceleration response of the sandwich type composite pavement which consists of three components, namely, the cross tensioned concrete pavement (CTCP), the asphalt sand (AS) stress-absorbing layer, and the continuously reinforced concrete pavement (CRCP), from top to down, is experimentally studied under different heavy vehicle impacts. First, the acceleration response spectra of CTCP and CRCP are measured by the embedded accelerometer under the axle loads of 100, 200 and 300 kN, respectively. The statistical mean of the ratio of CTCP and CRCP accelerations is defined as the stress-absorbing factor of the AS stress-absorbing layer. After that, the frequency spectra of the pavements are received from the Fourier transformation of 3 groups of acceleration response spectra. The test results show that under the 3 groups of axle loads the acceleration max peak values of CTCP are 0.022, 0.039 and 0.059 m·s-2, those values of CRCP are 0.010, 0.015 and 0.025 m·s-2, and the stress-absorbing factors of the AS stress-absorbing layer are 3.15, 3.38 and 3.46. It can be known that the sandwich type composite pavement is suitable for the application in the heavy traffic, because the AS stress-absorbing layer can effectively decrease the pounding of the heavy vehicle on the pavements. |
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