Monitoring System for Vibration Control in Wood Structures

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著增长。木材是一种有吸引力的绿色建筑材料，因为它比传统建筑材料消耗更少的能源，吸收碳，排放更少的温室气体。木制品的研究和进展表明，木结构能够很好地超越传统的限制。加拿大国家建筑规范正在修订中，以承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，地板重量轻，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的脚步声引起的振动的影响。较高的木质建筑也容易受到风振的影响。过度的地板振动会给居住者带来不适，或干扰对振动敏感的设备的性能。行人往往是建筑物振动的主要来源。在振动敏感设备的情况下，可能导致性能下降的振动水平往往远远低于人类所能感知的水平。因此，振动问题可能正在发生，即使它们没有被察觉。考虑足部振动是结构设计过程中重要的一步。设计师依靠指导方针来确保这些振动根据预期用途保持在可接受的水平。目前，对钢结构和混凝土结构有全面的指导方针，但对木结构的类似指导方针，特别是认识到木结构的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发展趋势，迫切需要制定木结构的振动指南，以经济的方式防止木结构的振动问题。***需要一个由13个无线三轴加速度计组成的振动监测系统来测量木结构的振动。通过对木结构进行振动测量，将制定木结构中人为载荷的振动指南。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效用。通过减少潜在的设计障碍，它将鼓励使用木材，一种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致振动、车辆致振动、桥梁斜拉索、地震工程、结构健康监测等研究**

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. **