Floor Vibration Serviceability in a Multistory Factory Building
Floor Vibration Serviceability in a Multistory Factory Building
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DOI：
10.1061/(asce)cf.1943-5509.0000688
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发表时间：
2016-02-01
影响因子：
2.5
通讯作者：
Yang, Guichang
中科院分区：
文献类型：
--
作者：
Brownjohn, James M. W.;Pan, Tso-Chien;Yang, Guichang
对总建筑面积超过0.1km2的六层多租户工业综合体的几个结构单元的大体积混凝土结构楼板进行了试验和分析模态分析及运行中的振动测试。系统研究的目的是确定振动源和影响振动适用性的因素，当改变使用模式导致不同类型的工业/商业用户对振动产生和容差的要求相互冲突时，这是一个主要问题。这是一次罕见的调查，旨在提供有关特定性能和相关技术的信息，供租户作出占用决定和类似建筑物的大厦管理。评估的楼层属于不同类型的工业单人单元，堆叠高达六层，具有跨度高达12米、第一振型频率大于8赫兹的多层楼层。这些高频楼板表现出典型的对脚步的瞬时响应行为，响应级别由模态质量控制。这些单元在典型的操作条件下进行了研究，包括仓储、仪器组装和测试、轻型电子/机械制造和机械加工。振动源包括内部和外部车辆、人类脚步和机械。研究表明，最繁重的装载形式是叉车，而同类型的较高楼层最不适用。试验模态分析表明，同一类型名义上相同的楼板具有令人惊讶的各种模态特性，并且与模态质量的性能相关。
Experimental and analytical modal analysis and in-operation vibration measurements were performed on the massive concrete structural floors of several structurally connected units' of a six-level, multitenant industrial complex with total floor usable area exceeding 0.1km2. The aim of the systematic study was to characterize vibration sources and factors that affect vibration serviceability, which is a major concern when changing usage patterns lead to conflicting requirements for vibration generation and tolerance for different types of industrial/commercial user. This was a rare investigation aiming to provide information on specific performance and relevant technologies for occupancy decisions by tenants and building management of similar structures. Floors evaluated were within different types of industrial single-occupant unit stacked up to six levels and having multibay floors with spans up to 12m with first vibration mode frequencies greater than 8Hz. These high-frequency floors display typical transient response behavior to footfalls, with response levels controlled by modal mass. Units were studied in typical operational conditions including warehousing, instrument assembly and testing, light electronic/mechanical manufacturing, and machining. Vibration sources included internal and external vehicles, human footfalls, and machinery. The study showed the most onerous form of loading to be forklift trucks and that higher level floors of the same type were least serviceable. Experimental modal analysis showed a surprising range of modal properties for nominally identical floors of the same type and the relevance to performance of modal mass.