Investigating the vibration properties of integrated ceiling systems considering interactions with surrounding equipment
Investigating the vibration properties of integrated ceiling systems considering interactions with surrounding equipment
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研究集成吊顶系统的振动特性，考虑与周围设备的相互作用
DOI：
10.1002/eqe.3264
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发表时间：
2020
影响因子：
4.5
通讯作者：
Ikeda Yoshiki
中科院分区：
文献类型：
--
作者：
Qi Liangjie;Kunitomo Keiichiro;Kurata Masahiro;Ikeda Yoshiki
对最近地震的研究强调，结构损坏最小的建筑物仍然遭受广泛的非结构部件损坏和失效。吊顶系统通常由加速度敏感的非结构元件组成，其掉落和损坏会导致长时间的功能中断和延长的恢复时间。本文通过实验和分析研究了集成吊顶系统的振动特性，考虑了与周围电气设备的相互作用。初步推导了电气设备的理论刚度和相应频率，然后通过后续的振动试验和数值分析进行验证。根据设计谱和地板反应谱，对不同安装配置的空调（AC）抗震性能进行了评估。考虑与周围设备相互作用的吊顶集成吊顶系统的振动测试表明，加入外围约束使吊顶系统的第一水平振动频率增加了约6倍。集成吊顶系统中所有部件的固有频率几乎相同，这归因于吊顶板与周围设备之间的耦合行为，强调了动态分析时相邻部件之间相互作用的影响。基于上述实验研究，创建了集成吊顶系统的相关数值模型。最后，进行了相应的参数研究，包括与周围设备的相互作用、空调的加强支撑以及两个标高之间的上升位置的加强构件。
Studies on recent earthquakes highlighted that buildings with minimal structural damage still suffer from extensive damage and failure of nonstructural components. The dropping and damage of suspended ceiling systems, which typically consist of acceleration‐sensitive nonstructural elements, resulted in lengthy functional disruptions and extended recovery time. This article experimentally and analytically examined the vibration properties of an integrated ceiling system considering the interactions with surrounding electrical equipment. The theoretical stiffness and corresponding frequency of electrical equipment were initially derived and then verified by subsequent vibration tests and numerical analyses. The seismic performance of the air conditioner (AC) was evaluated with different installment configurations based on design spectra and floor response spectra. Vibration tests of the suspended integrated ceiling system considering the interactions with surrounding equipment showed that the inclusion of peripheral constraints increased the first horizontal vibration frequency of the ceiling system by a factor of approximately 6. The natural frequencies of all components in the integrated ceiling system were almost identical, which was attributed to the coupled behavior between the ceiling panels and surrounding equipment, emphasizing the effect of interactions between adjacent components during dynamic analysis. Based on the above experimental investigation, an associated numerical model of the integrated ceiling system was created. Finally, corresponding parametric studies that included the interactions with surrounding equipment, reinforcing braces of ACs and strengthening members at the rise‐up location between two elevations were performed.