Three-Dimensional Isolation System for Building Resilience to Earthquake Hazard

用于增强地震灾害抵御能力的三维隔离系统

基本信息

批准号：
1437003
负责人：
Keri Ryan
金额：
$ 35.91万
依托单位：
Board of Regents, NSHE, obo University of Nevada, Reno
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2014
资助国家：
美国
起止时间：
2014-08-01 至 2018-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1437003&HistoricalAwards=false
关键词：
Three Dimensional Isolation System Building

项目摘要

Building isolation systems placed between foundation and the structure are able to reduce shaking of the buildings and mitigate serious damage in earthquakes. However, recent earthquakes and large scale tests have shown that there is a large amount of damage to the interior of buildings (mechanical system, ceiling tiles etc.) and to the critical equipment in buildings (hospital and electrical equipment, telecommunication items etc.) leading to inoperability of buildings and high economic losses. These damages to the interior are primarily caused by vertical shaking of the ground in earthquakes. This project will pursue research in identification of the level of vertical shaking in buildings in earthquake and development of isolator that reduces the shaking to acceptable level. The proposed system will stack traditional isolation bearings for protection from horizontal shaking and new devices for protection from vertical shaking. The new device combines a weight bearing liquid spring and controllable damper into a single package. These isolators will have potential of use in other engineered systems where vibrations are critical. The researchers will recruit participation of underrepresented groups in the research and education efforts.In this project, basic science will be advanced through an analytical study to understand the fundamental dynamics of three-dimensional isolation of rigid bodies and flexible structures, subjected to earthquakes. Optimal properties of an effective three-dimensional isolation system will be determined. The proposed vertical isolation system uses liquid spring technology that is robust, ideal for supporting large loads and operating in harsh conditions. The novelty of the proposed system is combining the liquid spring stiffness and the controllable damping characteristics into a single, sustainable device for civil infrastructure application. The proposed system is fail-safe, such that even under power or control system failures optimal damping is retained in the passive mode since the spring action is passive. A one quarter scale device will be designed, built, and characterized in this project.

放置在基础和结构之间的建筑隔离系统能够减少建筑物的震动，并减轻地震中的严重破坏。但是，最近的地震和大规模测试表明，建筑物内部（机械系统，天花板等）以及建筑物（医院和电气设备，电信项目等）的关键设备造成了大量损害，从而导致建筑物的不可行和高经济损失。这些内部的破坏主要是由于地震中的地面垂直震动引起的。该项目将在地震中识别建筑物中垂直震动水平的研究和隔离器的发展，从而将摇动降低到可接受的水平。拟议的系统将堆叠传统的隔离轴承，以防止水平摇动和新设备，以防止垂直摇动。新设备将重量轴承的液体弹簧和可控制的阻尼器结合在一起，成为一个包装。这些隔离器将在振动至关重要的其他工程系统中使用。研究人员将招募代表性不足的群体参与研究和教育工作。在该项目中，基础科学将通过一项分析研究来提进，以了解刚性身体和柔性结构的三维隔离的基本动态，受到地震的影响。将确定有效的三维隔离系统的最佳特性。拟议的垂直隔离系统使用液体弹簧技术，非常适合支撑大量负载和在恶劣条件下运行。所提出的系统的新颖性是将液体弹簧刚度和可控的阻尼特性结合在一起，成为一种可持续的，用于民用基础设施应用的可持续设备。所提出的系统是故障安全的，因此即使在电源或控制系统下，由于弹簧动作是被动的，因此最佳阻尼仍处于被动模式下。该项目将设计，构建和表征一个四分之一比例的设备。