Collaborative Research: An Innovative Gap Damper to Control Seismic Isolator Displacements in Extreme Earthquakes

合作研究：控制极端地震中隔震器位移的创新间隙阻尼器

• 批准号: 1100922
• 负责人: Justin Marshall
• 金额: $ 16万
• 依托单位: Auburn University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-07-01 至 2015-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1100922&HistoricalAwards=false
• 关键词: Collaborative; Research; Innovative; Gap; Damper

This research project will study the use of a special gap damper that is designed to limit the excessive deformation without causing impact and the associated high frequency motions and accelerations. In the design of a seismic base isolation system for a building, an isolator must be allowed to deform a significant amount. At the same time, this deformation must be controlled to avoid structural damage due to its reaching the displacement limit in a rare but possible strong ground motion. The project involves advanced analytical and numerical simulation studies to determine the optimal gap damper characteristics for desired performance such as the size of gap element, the ratio of pre- and post-gap isolation system stiffness, and the energy dissipation demand to reduce displacements without inducing large accelerations in the building. Experimental studies on a standalone damper will be conducted in the Structural Research Laboratory at Auburn University to characterize the energy dissipation properties of the damper. Shaking table studies at the Large Scale Structures Laboratory at the University of Nevada, Reno will validate the effectiveness of the proposed gap damper scheme. This study will provide an experimentally and analytically validated framework leading to reliable performance-based isolator design of buildings under different seismic scenarios.This research project is expected to lead to better designs of base isolation systems that are often used in critical or essential facilities such as hospitals, emergency operation centers, fire stations, and other important buildings. The research results will be broadly disseminated for practical implementation to practitioners through publication in technical journals, presentations in professional conferences and the website created for the project. The experimental data will be archived on the George E. Brown Network for Earthquake Engineering Simulation data repository for easy accessibility by other researchers in the earthquake engineering community. The project will provide advanced training to graduate and undergraduate students through their involvement in project research activities. To enhance the awareness and importance of earthquake engineering, a ?Reconnaissance Education Program" will be established with participation of several upper level undergraduate students with representation from underrepresented groups in an earthquake reconnaissance mission after the next major earthquake. This participation is expected to provide a life-changing experience for the students and to motivate them for long-term commitment to earthquake engineering.

该研究项目将研究使用特殊间隙阻尼器的使用，该阻尼器旨在限制过度变形而不会引起影响以及相关的高频运动和加速。 在设计建筑物的地震基隔离系统时，必须允许隔离器变形。 同时，必须控制这种变形，以避免由于其在罕见但可能强的地面运动中达到位移极限而导致的结构损坏。 该项目涉及高级分析和数值模拟研究，以确定所需性能的最佳间隙阻尼器特性，例如间隙元素的大小，差距前和差距后隔离系统的僵硬之比以及能量耗散需求，以减少位移而不诱导建筑物中的大加速度。关于独立阻尼器的实验研究将在奥本大学的结构研究实验室进行，以表征阻尼器的能量耗散特性。里诺内华达大学的大规模结构实验室的摇桌研究将验证拟议的间隙阻尼计划的有效性。这项研究将提供一个实验和分析验证的框架，从而在不同的地震场景下为建筑物的基于可靠的绩效隔离器设计。该研究项目有望在医院，紧急运营中心，消防局和其他重要建筑物等关键或基本设施中提供更好的基础隔离系统的设计，这些设计通常用于基础隔离系统。该研究结果将通过技术期刊上的出版，专业会议的演示以及为该项目创建的网站来广泛传播用于从业人员的实际实施。实验数据将在地震工程模拟数据存储库的乔治·布朗网络上存档，以便于地震工程社区的其他研究人员易于访问。该项目将通过参与项目研究活动为研究生和本科生提供高级培训。为了提高地震工程的意识和重要性，将建立一项侦察教育计划。