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机构地区:[1]大连民族学院土木建筑工程学院,辽宁大连116600 [2]河南省交通规划勘察设计院有限责任公司第五分院,河南郑州450000 [3]中船重工第七一七研究所武汉光电国家实验室,湖北武汉430040
出 处:《辽宁工程技术大学学报(自然科学版)》2014年第6期801-804,共4页Journal of Liaoning Technical University (Natural Science)
基 金:中央高校基本科研业务费专项资金资助项目(DC12010110)
摘 要:为考察依据经验规范理论设计的沥青路面在高频重载交通作用下易发生车辙、裂缝、坑槽等损伤从而引起结构大面积失效的损毁规律,需要通过实时和长期的健康监测方式获取其真实力学性能的演化及衰减历程.在众多智能感知元件中,考虑光纤所具备的成本低、几何形状多方适应性、分布式测试等优点,本文提出了一种柔性细集料封装光纤传感器,以素沥青为光纤外包层,以小粒径沥青混合料为封装层,通过有限元及基础试验确定封装尺寸,以分级加载试验校核其感知性能,并运用力学理论建立光纤感知应变和载荷之间的定量关系.研究结果表明:在改进压实工艺后,该种柔性封装光纤传感器可用于沥青路面结构的准确、有效监测.To check the destroy law of asphalt pavements designed by empirical normative theory usually suffering from rutting, cracks and potholes and blossoming out into large-scale cross section failure under the high-frequency and heavy-weight loads, real-time and long-term monitoring technology is employed to obtain the evolution and decay process of real mechanical state. Among these sensing elements, optical fiber was selected for the advantages of low cost, good geometrical shape versatility and distributed monitoring, and a kind of flexible small-size particles packaging optical fiber sensor was put forward, with pure asphalt as cladding and fine aggregate mixtures as protective layer. Finite element analysis and batch tests have been explored to determine geometry of packaging block, and grading loading tests were used to check the sensing performance. Moreover, theory deduction was accomplished to establish the quantitative relation of strain and load. Results prove that it is feasible of putting this flexible packaging optical fiber sensor into precisely and efficiently monitoring the deformation of asphalt pavement structure, after improving the compaction process of packaging block.
关 键 词:沥青路面 结构健康监测 柔性封装工艺 光纤传感器 力学分析
分 类 号:U416.217[交通运输工程—道路与铁道工程]
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