CAREER: A Rational Framework for In-situ Geotechnical and Pavement Characterization by Wave Methods

9875495博扬B。明尼苏达州古齐纳大学CAREER：一个合理的框架，为现场土工和路面表征波方法 该项目的目的是提供一个先进的分析和实验基础，现场表征波的方法，并整合到土木工程课程的弹性波传播和无损检测的基本原理。 利用目前的计算能力，将进行研究，以开发一种混合技术，用于实际的场地表征，该技术将以系统和严格的方式说明诱导波传播的三维性质、土壤刚度、密度和阻尼。 它包括发展的正向和反向波传播分析和他们的实施成为一个有效的领域技术地震探测的岩土工程场地和路面。 除了揭示现场波速和衰减剖面外，新方法还能够提供通常无法从地震测量中获得的独立刚度和质量密度信息。 一个全面的动态土壤，岩石和沥青性能的描绘，通过所提出的技术可以发现使用在广泛的应用，如规划的岩土取样程序，设计的基础上动态负载，土壤液化潜力的评估，路面监测和修复。 为了促进该项目的实施阶段，与明尼苏达州交通部建立了合作关系，将提供适当的实地测试设备和独特的实验场地。 上述研究计划将与课程开发工作一起进行，以促进在土木工程中越来越多地使用无损检测。 为此，将努力设计一门新的土木工程波浪法课程，并开发一套数字教学模块，向学生介绍弹性波传播的基本原理及其在波浪法现场和实验室测试中的应用。

9875495 Bojan B. Guzina University of Minnesota CAREER: A Rational Framework for In-situ Geotechnical and Pavement Characterization by Wave Methods ABSTRACT The aim of this project is to provide an advanced analytical and experimental basis for site characterization by wave methods and to integrate the fundamentals of elastic wave propagation and non-destructive testing into the civil engineering curriculum. Making use of current computational power, research will be conducted to develop a hybrid technique for realistic site characterization that would account for the three-dimensional nature of the induced wave propagation, soil stiffness, density and damping in a systematic and rigorous manner. It includes the developments in forward and inverse wave propagation analyses and their implementation into an effective field technique for seismic sounding of geotechnical sites and pavements. In addition to revealing the in-situ wave velocity and attenuation profiles, the new method will be capable of furnishing the independent stiffness and mass density information that is typically not available from seismic measurements. A comprehensive delineation of dynamic soil, rock and asphalt properties by means of the proposed technique may find use in a wide range of applications such as planning of geotechnical sampling programs, design of foundations to dynamic loads, evaluation of the soil liquefaction potential, and pavement monitoring and repair. To facilitate the implementation phase of the project, a collaboration with the Minnesota Department of Transportation has been established which will provide access to an appropriate field testing equipment and a unique experimentation site. The foregoing research program will be conducted in conjunction with a curriculum development effort to foster the growing use of non-destructive testing in civil engineering. To this end, efforts will be directed to design a new course on wave methods in civil engineering, and to develop a set of digital instructional modules that would introduce students to the fundamentals of elastic wave propagation and their applications to field and laboratory testing by wave methods.