【作者】 韩嵘；

【导师】 石志飞；

【作者基本信息】 北京交通大学 ， 结构工程， 2010， 博士

【摘要】 近年来,随着智能材料和结构在土木工程中应用的迅速增长,水泥基智能复合材料已成为智能材料研究的前沿领域之一。水泥基压电智能复合材料是水泥基智能复合材料之一,它是近年发展起来的一种新型的功能复合材料。在土木工程领域,应用最多的结构材料是混凝土,研发与混凝土相容性好的智能材料具有重要意义。以水泥作为智能材料的基体,掺入压电陶瓷材料作为功能体,可以形成与混凝土具有良好相容性的水泥基压电智能复合材料。利用水泥基压电智能复合材料制作的压电元件,可以克服传统压电元件在土木工程结构应用中存在的相容性差等诸多问题。水泥基压电智能复合材料或器件在理论分析方面还有许多问题需要解决,如分析模型的建立及精确解的获得等。本文针对上述问题,进行了较系统的研究,主要内容包括：1)建立0-3型、2-2型和夹芯型水泥基压电智能器件的分析模型,给出理论分析方法,获得相关器件的解析解；2)讨论压电相、材料参数、压电陶瓷粉末体积含量、压电片极化方向、荷载类型、荷载频率等因素对器件性能的影响；3)进行数值分析,并将理论结果与数值结果和实验结果进行比较。本文建立了0-3型、2-2型和夹芯型水泥基压电智能器件的理论分析模型,给出了解析解。本文工作可为上述水泥基压电智能器件的合理设计提供理论指导,对水泥基压电智能器件在土木工程中的应用具有重要的意义。更多还原

【Abstract】 In recent years, with the rapid growth of smart materials and structures in civil engineering applications, cement-based smart composites have become one of the frontiers in smart materials research. Cement-based piezoelectric composite is one of cement-based smart composites.It is a new functional composite materials developed in recent.In the civil engineering field, concrete is the most widely used structural materials. Research and development of the smart materials that have good compatibility with concrete is important. Cement as smart materials matrix, piezoelectric ceramic materials as mixed function body, can form cement-based piezoelectric smart composites with good compatibility in concrete. The piezoelectric elements using cement-based piezoelectric smart composite materials can overcome many problems of traditional piezoelectric elements in civil engineering applications.There are many problems to be solved in the theoretical analysis of cement-based piezoelectric smart composites or devices, such as the establishment of analysis models and analytical solutions obtained. To address the above problems, a systematic study has been carried out in this work the main contents include:1)the models of 0-3,2-2 and sandwich cement-based pezoelectric smart devices are established. Analysis methods are given to find the analytical solutions for the smart devices; 2) The effects of the piezoelectric phase, material parameters, piezoelectric ceramic powder volume ratio, the polarization direction of piezoelectric patches, load type, load frequency on the characters of devices are discussed.3)The numerical results and experimental results are compared.This work gives the analysis models and exact analysis of 0-3,2-2 and sandwich cement-based piezoelectric smart devices, and provides theoretical guidance for the rational design of 0-3,2-2 and sandwich cement-based piezoelectric smart devices. It has great significance to cement-based piezoelectric smart devices in civil engineering applications.更多还原