BRIGE: Validating an Intrinsic Damping Model for the Dynamic Response of Soil-Structure Systems

该bridge项目的两个目标是：(1)启动首席研究员？(2)不同类型的学生成为工程实践者、研究人员和教育工作者的动机。固有阻尼是衡量材料耗散能量能力的一种方法，对预测土壤-结构系统至关重要。S动态响应。然而，目前尚不清楚如何对典型基础设施系统的天然土和人造构件的固有阻尼特性进行数学建模。这是一个重大的缺点，因为许多土木工程结构受到动力载荷必须考虑与他们的土壤基础，以适当地预测动力响应。bridge的研究将：(1)利用从共振柱试验和仪器离心机模型中收集的实验数据，验证土-结构系统中非均匀固有阻尼的等效线性建模程序；(2)为合理模拟土-结构动力学提供一个可访问的、可靠的有限元框架。通过提高预测基础设施系统的知识水平？对典型（例如，交通和风）以及极端动态载荷（例如，地震和爆炸）的响应以及传播结合这些进步的可访问的有限元算法，土木工程系统可以更有效地设计以安全保护其人类居住者和用户。bridge项目所涉及的多样化努力将包括通过研究参与、外展服务、招聘和教育为各种各样的学生创造积极的工程经验，以培养一个包容性的工程社区。具体而言，PI将：(1)创造本科生和研究生工程研究机会，支持不同群体的工程专业学生；(2)参加旨在鼓励当地以少数民族为主的中学和高中女生对工程感兴趣的宣传活动；(3)积极招收女性和少数民族本科生和研究生；(4)作为一名有指导工科学生经验的女教师，作为一个积极的榜样，运用教学技巧来保持对工程学的兴趣，特别是那些来自传统上代表性不足的群体的学生。

The two objectives to this BRIGE project are: (1) The initiation of the Principal Investigator?s long-term research in dynamic soil-structure interaction and (2) The motivation of a diverse spectrum of students to become engineering practitioners, researchers, and educators. Modeling intrinsic damping, a measure of a material´s ability to dissipate energy, is critical in predicting a soil-structure system?s dynamic response. However, it is unclear how to mathematically model the intrinsic damping characteristics of both the natural earth and manmade components of a typical infrastructure system. This is a significant shortcoming, as many civil engineering structures subjected to dynamic loading must be considered in conjunction with their soil foundations to appropriately predict dynamic response. The BRIGE research will: (1) Validate an equivalent linear modeling procedure for nonuniform intrinsic damping in soil-structure systems using experimental data gathered from resonant column tests and instrumented centrifuge models and (2) Result in an accessible, robust finite element framework for rationally modeling soil-structure dynamics. By advancing the state of knowledge in predicting infrastructure systems? responses to typical (e.g., traffic and wind) as well as extreme dynamic loads (e.g., earthquakes and blasts) and disseminating an accessible finite element algorithm incorporating these advances, civil engineering systems may be more effectively designed to safely protect their human occupants and users. The diversification efforts involved in this BRIGE project will consist of creating positive engineering experiences for a wide variety of students through research participation, outreach service, recruitment, and education geared toward fostering an inclusive engineering community. Specifically, the PI will: (1) Create undergraduate and graduate engineering research opportunities that support a diverse group of engineering students; (2) Participate in outreach activities aimed at encouraging interest in engineering for females at local, predominantly minority middle and high schools; (3) Actively recruit female and minority undergraduate and graduate students; and (4) As a female faculty member with experience in mentoring engineering students, act as a positive role model who implements teaching techniques to retain interest in engineering, particularly in those students from traditionally underrepresented groups.