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

BRIGE：验证土壤结构系统动态响应的固有阻尼模型

• 批准号: 0819106
• 负责人: Judith Wang
• 金额: $ 17.5万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-15 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0819106&HistoricalAwards=false
• 关键词: BRIGE; Validating; Intrinsic; Damping; Model

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.

BRIGE项目的两个目标是：（1）启动首席研究员？对动力土与结构相互作用的长期研究;（2）不同类型的学生成为工程从业者、研究人员和教育工作者的动机。模拟固有阻尼，一种衡量材料耗散能量能力的方法，在预测土壤-结构系统中至关重要？的动态响应。然而，目前还不清楚如何数学模型的固有阻尼特性的自然地球和一个典型的基础设施系统的人造组件。这是一个明显的缺点，因为许多承受动态载荷的土木工程结构必须与它们的土壤基础一起考虑，以适当地预测动态响应。 桥梁研究将：（1）利用共振柱试验和仪器离心模型的试验数据，建立了土-结构系统非均匀固有阻尼的等效线性模型;（2）建立了合理模拟土-结构动力学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？对典型的（例如，交通和风）以及极端动态负载（例如，地震和爆炸），并传播一个可访问的有限元算法，结合这些进步，土木工程系统可以更有效地设计，以安全地保护其人类居住者和用户。 参与这个桥梁项目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，旨在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的工程研究机会，支持不同的工科学生群体;（2）参加旨在鼓励当地主要是少数民族初中和高中女生对工程的兴趣的外联活动;（3）积极招收女生和少数民族本科生和研究生;以及（4）作为一名有指导工程专业学生经验的女教师，作为一个积极的榜样，实施教学技巧，以保持对工程的兴趣，特别是那些来自传统上代表性不足的群体的学生。