Monitoring System for Vibration Control in Wood Structures

木结构振动控制监测系统

• 批准号: RTI-2020-00034
• 负责人: VanEngelen, Niel
• 金额: $ 3.3万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=689180
• 关键词: Monitoring; System; Vibration; Control; Wood

Recent trends indicate that the Canadian construction industry is experiencing significant growth in green construction projects. Wood is an attractive green building material since it uses less energy, sequesters carbon and emits fewer green house gases than traditional building materials. Research and advances in wood products have demonstrated that wood structures are able to perform well beyond traditional limitations. The National Building Code of Canada is being revised to recognize the suitability of wood construction for a wider range of structures. Modern structures are often taller and highly efficient, with lightweight floors that can span large unsupported distances. The combination of the lightweight and large spans renders floors more susceptible to vibrations caused by human footfalls. Taller wood buildings are also susceptible to wind-induced vibrations. Excessive floor vibrations can cause discomfort for occupants or interfere with the performance of vibration-sensitive equipment. Pedestrians are often the governing source of vibrations in structures. In the case of vibration-sensitive equipment, the level of vibration that can cause reduced performance is often far below what can be perceived by humans. Therefore, vibration issues may be occurring even if they are not perceived. *** Consideration of vibrations due to footfalls is an important step in the structural design process. Designers rely on guidelines to ensure that these vibrations remain at an acceptable level depending on the intended use. Currently, comprehensive guidelines are available for steel and concrete structures, but a similar guideline for wood structures, especially one which recognizes the recent advances in wood construction, is not available. Considering the current trends in wood construction in Canada, a vibration guideline for wood structures is urgently needed to prevent vibration issues through economical means. *** A vibration monitoring system composed of thirteen wireless triaxial accelerometers is requested to measure vibrations in wood structures. Vibration guidelines for human-induced loads in wood structures will be developed by conducting vibration measurements in wood structures. The results will be used to evaluate and develop advanced prediction and modelling techniques. This research will improve the utility of wood structures by preventing annoying or disruptive vibrations from occurring. It will encourage the use of wood, an important green building material, by mitigating a potential design barrier. The requested equipment is highly versatile and appropriate for many applications in structural dynamics beyond what is described here. Other potential uses include conducting research on wind-induced vibrations, vehicle-induced vibrations, bridge stay cables, earthquake engineering, structural health monitoring, etc. **

最近的趋势表明，加拿大建筑业正在经历绿色建筑项目的显着增长。木材是一种有吸引力的绿色建筑材料，因为它使用更少的能源，固碳和排放更少的绿色气体比传统的建筑材料。木制品的研究和进步表明，木结构能够超越传统的限制。《加拿大国家建筑规范》正在修订，以确认木结构适用于更广泛的结构。现代建筑通常更高，效率更高，轻质地板可以跨越很大的无支撑距离。轻质和大跨度的结合使地板更容易受到人类脚步引起的振动。较高的木结构建筑也容易受到风引起的振动。过度的地板振动会导致居住者不适或干扰振动敏感设备的性能。行人通常是结构振动的主要来源。在振动敏感设备的情况下，可能导致性能降低的振动水平通常远低于人类可以感知的水平。因此，振动问题可能会发生，即使它们没有被察觉。 *** 考虑由于脚步引起的振动是结构设计过程中的重要步骤。设计人员依靠指南来确保这些振动保持在可接受的水平，具体取决于预期用途。目前，钢结构和混凝土结构有全面的指导方针，但木结构的类似指导方针，特别是认识到木结构最新进展的指导方针，还没有。考虑到目前加拿大木结构建筑的趋势，迫切需要一个木结构振动指南，以通过经济手段防止振动问题。*** 为了测量木结构的振动，需要一个由13个无线三轴加速度计组成的振动监测系统。将通过对木结构进行振动测量，制定木结构中人为荷载的振动准则。研究结果将用于评估和开发先进的预测和建模技术。这项研究将通过防止恼人或破坏性振动的发生来提高木结构的实用性。它将通过减少潜在的设计障碍，鼓励使用木材这一重要的绿色建筑材料。所要求的设备是高度通用的，适用于结构动力学中的许多应用，超出了这里所描述的。其他潜在用途包括进行风激振动、车辆振动、桥梁斜拉索、地震工程、结构健康监测等研究。**