基于压电智能骨料的沥青混凝土路面车辆动态荷载监测
发布时间：2018-12-25 14:31
【摘要】：提出了一种基于压电智能骨料(Smart Aggregate,SA)的沥青混凝土(Asphalt Concrete,AC)路面车辆荷载监测方法。首先,考虑不同车速进行了埋入SA的AC块体动态加载试验研究,采用电液伺服试验机进行动态荷载加载,给出了SA在给定边界条件下的灵敏度,并分析了加载速率对其影响;其次,建立了嵌入SA的AC块体的有限元模型,模拟了试验中实际加载边界条件,分析了AC中的应力分布,进而得出了SA的灵敏度,并与试验结果进行了对比。最后,通过有限元模拟,研究了AC弹模变化对SA灵敏度的影响。研究表明,对于埋入SA的AC路面,车辆动态荷载下SA灵敏度为线性,常温下AC弹模变化对SA灵敏度影响可忽略不计。提出的基于SA的AC路面车辆荷载监测方法是可行的。
[Abstract]:A vehicle load monitoring method for asphalt concrete (Asphalt Concrete,AC) pavement based on piezoelectric intelligent aggregate (Smart Aggregate,SA) is proposed. Firstly, the dynamic loading test of AC block embedded in SA is carried out at different speeds. The sensitivity of SA under given boundary conditions is given, and the effect of loading rate on it is analyzed. Secondly, the finite element model of AC block embedded in SA is established, the actual loading boundary conditions are simulated, the stress distribution in AC is analyzed, and the sensitivity of SA is obtained, and the results are compared with the experimental results. Finally, the influence of AC elastic modulus on the sensitivity of SA is studied by finite element simulation. The results show that the sensitivity of SA is linear for the AC pavement embedded in SA, and the influence of AC elastic modulus variation on SA sensitivity is negligible at room temperature. The method of vehicle load monitoring based on SA for AC pavement is feasible.
【作者单位】： 大连理工大学土木工程学院;
【基金】：国家自然科学基金(50908031) 国家科技支撑项目(2011BAK02B01)
【分类号】：U411
[Abstract]:A vehicle load monitoring method for asphalt concrete (Asphalt Concrete,AC) pavement based on piezoelectric intelligent aggregate (Smart Aggregate,SA) is proposed. Firstly, the dynamic loading test of AC block embedded in SA is carried out at different speeds. The sensitivity of SA under given boundary conditions is given, and the effect of loading rate on it is analyzed. Secondly, the finite element model of AC block embedded in SA is established, the actual loading boundary conditions are simulated, the stress distribution in AC is analyzed, and the sensitivity of SA is obtained, and the results are compared with the experimental results. Finally, the influence of AC elastic modulus on the sensitivity of SA is studied by finite element simulation. The results show that the sensitivity of SA is linear for the AC pavement embedded in SA, and the influence of AC elastic modulus variation on SA sensitivity is negligible at room temperature. The method of vehicle load monitoring based on SA for AC pavement is feasible.
【作者单位】： 大连理工大学土木工程学院;
【基金】：国家自然科学基金(50908031) 国家科技支撑项目(2011BAK02B01)
【分类号】：U411
【参考文献】
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