基于压电陶瓷的沥青混凝土亚微米级损伤识别研究

项目名称： 基于压电陶瓷的沥青混凝土亚微米级损伤识别研究

项目编号： No.51508344

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 建筑环境与结构工程学科

项目作者： 唐宁

作者单位： 沈阳建筑大学

项目金额： 21万元

中文摘要： 沥青路面的早期损伤若未及时发现，会造成路面性能恶化，增加路面的养护维修成本。因此，客观精确地识别沥青路面早期损伤是一个国内外学者关注的热点科学问题。本项目拟在总结国内外研究成果和申请人前期研究工作的基础上，基于压电陶瓷产生的振动波，结合亚微米CT扫描技术，于微观尺度识别沥青混凝土的早期损伤。.通过制备嵌入或粘贴压电元件的沥青混凝土试件并测试其静态、动态工作特性，一方面建立压电-沥青混凝土结构的基本力电耦合模型，精确分析材料因素和外界条件对压电元件敏感特性的影响；一方面建立压电振动波在沥青混凝土中的激励产生理论，揭示压电振动波在沥青混凝土中的扩散、吸收、散射的传播规律。从而阐明压电振动波在沥青混凝土中损伤识别的方法，建立以传感信号为基础的亚微米级沥青混凝土损伤识别图谱。通过本项目的理论和实验研究，将为沥青路面疲劳损伤识别及预养护时机的判断提供科学依据，并建立一种新颖、高效、灵敏的评价方法。

中文关键词： 损伤识别；沥青混凝土；压电陶瓷；CT扫描；振动波

英文摘要： If an earlier damage of pavement is not found in time, it leads to deteriorated performance and increased the cost of the pavement maintenance. Hence, the damage detection of pavement is a very hot research topic on the pavement preventive maintenance. Based on the literature reviews and the previous studies of the project applicant, this project start with the waves from piezo ceramics, analyze the damage detection of asphalt concrete at micro scale, by submicron Computed Tomography Scan technologies. .Asphalt concrete specimens based on embedded or pasted piezo ceramics will be specially designed and prepared. The static and dynamic performance of piezo ceramics in asphalt concrete will be tested. On the one hand, the coupling model of piezo-asphalt concrete can be set up. The sensitive of piezo ceramics will be investigated to understand the influence criteria of material characteristics and environmental issues. On the other hand, the excitation theory and propagation law of piezoelectric vibration wave in the asphalt concrete can be established by diffusion, absorption and scattering. Furthermore, the damage detection methods of asphalt concrete based on piezoelectric vibration wave can be illuminated. The submicron image of damage detection in asphalt concrete will be established through the piezoelectric sensing signal. This research will give technical reference for damage detection and pavement preventive maintenance and finalize a new, efficient and sensitive evaluation method.

英文关键词： Damage detection ;Asphalt concrete ;Piezoceramics;Computed Tomography Scan;Vibration wave