Floor Vibration Serviceability Studies

地板振动适用性研究

• 批准号: 1335004
• 负责人: Mehdi Setareh
• 金额: $ 20.3万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1335004&HistoricalAwards=false
• 关键词: Floor; Vibration; Serviceability; Studies

This project will pursue research in prediction of floor vibrations due to human activities. The research plan consists of two parts: (1) a study of the effects of the human-floor system interaction, and (2) a study of floor vibration assessment for human acceptance. To conduct the research, the project will use laboratory experiments, field investigations, and analytical studies. Finite element analytical model will be used to represent the structural system of the floor. Experimental research will be conducted using an existing two-story structure in the Laboratory. The test structure will help the investigators to study the effects of human-structure interaction and assess floor vibrations under a controlled laboratory environment. In addition, parameters for the assessment of floor vibrations for human perception will be studied. A series of field tests and measurements on large floor structures are planned to validate analytical and laboratory results. The outcome of this research will be of significance to the committees dealing with building serviceability issues as related to floor vibrations. Unacceptable floor vibrations can be a serious serviceability issue for architects, engineers, and building owners. This problem is becoming prevalent due to the use of higher strength materials, use of computer-assisted design to optimize the weight of structural members, rhythmic human activities such as dancing, aerobics, indoor jogging, etc., and innovative designs by architects achieving long, column-free spans resulting in a reduction in the natural frequency and damping. The result is that many floors are susceptible to annoying vibrations requiring expensive retrofitting. In addition, housing of sensitive equipment such as magnetic resonance imaging scanners, electron microscopes, etc., on building floors require very low vibration limits for their proper operations. It is necessary to predict analytically vibration performance of floors when subjected to excitations by human activities. The most important issues in floor vibrations are the dynamic interaction between humans and floor structure and human perception of vibrations

该项目将继续研究由人类活动引起的地板振动的预测。研究计划由两部分组成：(1)人-地系统相互作用的影响研究；(2)人类可接受性的地板振动评估研究。为了进行研究，该项目将使用实验室实验、实地调查和分析研究。采用有限元分析模型来描述楼板的结构体系。实验研究将使用实验室现有的两层结构进行。该测试结构将帮助研究人员研究人-结构相互作用的影响，并在受控的实验室环境下评估地板振动。此外，还将研究用于评估地板振动以供人类感知的参数。计划对大型地板结构进行一系列现场测试和测量，以验证分析和实验室结果。这项研究的结果将对处理与地板振动有关的建筑物适用性问题的委员会具有重要意义。对于建筑师、工程师和建筑物业主来说，不可接受的地板振动可能是一个严重的适用性问题。由于使用更高强度的材料，使用计算机辅助设计来优化结构构件的重量，有节奏的人类活动，如跳舞、有氧运动、室内慢跑等，以及建筑师实现长的、无柱跨度的创新设计，从而降低了固有频率和阻尼，这个问题变得普遍起来。其结果是，许多地板很容易受到恼人的振动的影响，需要昂贵的翻新。此外，建筑物楼层上的敏感设备(如磁共振成像仪、电子显微镜等)的外壳需要非常低的振动限制才能正常运行。因此，有必要对楼板在人类活动激励下的振动性能进行解析预测。地板振动中最重要的问题是人与地板结构之间的动态相互作用以及人对振动的感知