...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Mechanical systems and signal processing >Human-structure dynamic interaction between building floors and walking occupants in vertical direction
【24h】

Human-structure dynamic interaction between building floors and walking occupants in vertical direction

机译：建筑地板与行走乘客在垂直方向之间的人体结构动态相互作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

While modern building floors feature lightweight materials and slender structural elements, their dynamic interaction with walking occupants has not been quantified. This is despite the proven and significant influence of this interaction on human-induced vibration levels of other types of lightweight structures, such as footbridges. This work presents an experimental study to quantify the effect of walking pedestrians on the frequency response functions (FRFs), which are dependant on the corresponding modal properties, of two floors, a relatively light floor with low fundamental frequency and a heavier floor with higher fundamental frequency. It also proposes an improved methodology to take into account the interaction between walking pedestrians and supporting floors in the response calculation of human-induced vibrations. Instead of the conventional mass-spring-damper or inverted-pendulum models, the proposed model utilises two experimentally-driven transfer functions, related to the dynamics of walking individuals, over a range of frequencies between 1 Hz and 10 Hz, to mathematically describe the dynamics of this interaction. Hence, the proposed model is relevant to floors with fundamental frequency less than 10 Hz (i.e. low-frequency floors). The results show that walking occupants can cause significant reduction in the amplitudes of the FRFs. This reduction ranges from 44% and 62% for a floor occupied by two or six walking pedestrians, respectively, to 10% for a heavier floor with a higher fundamental frequency occupied by six walking pedestrians. This implies that ignoring this phenomenon in the design can result in an overestimation of the predicted vibration levels. This is especially the case for floors with relatively low fundamental frequency and modal mass. Furthermore, the derived transfer functions related to the dynamics of walking individuals indicated the existence of three whole-body modes of vibration with frequency less than 10 Hz. The performance of the proposed human-structure interaction model is verified with experimental measurements of vibration responses related to individual occupants walking on three floors. The simulated vibration levels are consistent with their measured counterparts indicating the applicability of the proposed model.
机译：虽然现代建筑地板具有轻质材料和细长的结构元素，但它们与行走乘客的动态互动尚未量化。尽管这种相互作用对人类诱发的振动水平的其他类型的轻质结构（例如脚底织物）而言，这是经过验证和显着的影响。这项工作提出了一种实验研究，以量化行走行人对频率响应函数（FRF）的影响，这些频率响应函数（FRF）取决于两个楼层的相应模态特性，一个相对较轻的地板，具有低基频和较重的地板，具有更高的基础频率。它还提出了一种改进的方法，以考虑人行道振动响应计算行走行人和支持地板之间的相互作用。该提出的模型代替传统的肿块脉冲阻尼器或倒立摆动模型，该模型利用了两个实验驱动的传递函数，与行走人员的动态相关，在1 Hz和10 Hz之间的一系列频率上，以数学方式描述这种互动的动态。因此，所提出的模型与具有小于10Hz的基本频率的楼层（即低频楼层）。结果表明，行走乘员会导致FRF的幅度显着降低。这一减少范围从两名或六人行走行人占用的地板占据了44％和62％，对于较重的地板，六人行走行人占据了较高的地板的10％。这意味着忽略设计中的这种现象可能导致预测振动水平的高估。楼层尤其是具有相对较低的基频和模态质量的楼层。此外，与行走人员动态相关的推导传递函数表明，存在三种全身振动模式，频率小于10Hz。验证了所提出的人结构相互作用模型的性能，用与三层行走的各个乘员有关的振动响应的实验测量。模拟振动水平与其测量的对应物一致，其指示所提出的模型的适用性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号