Floor Vibration Serviceability Studies

该项目将继续研究人类活动引起的地板振动的预测。研究计划包括两个部分：（1）研究人-地板系统相互作用的影响，（2）研究人类接受的地板振动评估。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。将使用有限元分析模型来表示楼层的结构体系。实验研究将利用实验室现有的两层结构进行。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，将研究用于评估人类感知的地板振动的参数。计划对大型楼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。这项研究的结果将是有意义的委员会处理与地板振动有关的建筑物的可用性问题。对于建筑师、工程师和建筑业主来说，不可接受的地板振动可能是一个严重的可用性问题。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，例如跳舞、有氧运动、室内慢跑等，建筑师的创新设计实现了长的无柱跨度，从而降低了固有频率和阻尼。其结果是，许多地板容易受到恼人的振动，需要昂贵的改造。此外，磁共振成像扫描仪、电子显微镜等敏感设备的外壳，在建筑物地板上，要求非常低的振动极限以用于它们的适当操作。有必要分析预测楼层在人类活动激励下的振动性能。人与楼板结构之间的动力相互作用以及人对楼板振动的感知是楼板振动研究中的重要问题

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