移動載重引致鋼承樓版振動之評估

Evaluation of composite floor vibrations induced by moving loads

10.6849/SE.201709_32(3).0004

翁健煌(Jian-Huang Weng)；李其航(Chi-Hang Li)

樓版振動 ； 鋼承版 ； 移動載重 ； 通用振動標準 ； 1/3 倍頻程譜 ； SCI P354 ； floor vibration ； composite floor deck ； moving load ； generic vibration criteria ； one-third octave spectrum ； SCI P354

結構工程

32卷3期（2017 / 09 / 01）

69 - 87

繁體中文

一般實驗研究中心的振動敏感設備多規劃於地下室，一方面可減緩建築物外部環境振動之影響；另一方面，當須增加樓版厚度時，因樓版的水平地震力可直接由地下室外牆承擔，故對整體結構設計之影響較小。然而，地下室用途經常包含停車或裝卸貨物，在空間規劃上雖可設置全高RC 牆以區隔車道，或使振動敏感設備盡量遠離車道，但其效果仍須經由樓版振動分析才可確認。本文應用SAP2000 之移動載重分析功能，評估建築物內部車行載重引致的樓版振動，其中，考慮樓版型式為鋼結構常見之鋼承樓版，故結構模擬部分特別參考英國鋼結構學會出版的樓版振動設計指引SCIP354。本文內容包含移動載重模擬、鋼承樓版模擬以及振動標準計算等，其中，振動標準採用高科技廠房常見的通用振動標準，最後，以一動物實驗中心之樓版振動設計為例，詳述各項操作細節和常見問題的解決方法。

In the laboratories or research centers, the vibration-sensitive equipments are often placed on the basement floors. The reason is the impact of environmental vibrations outside the building can be reduced. Another reason is the influence on the structural design will be smaller if the slab thickness needs to be increased because the lateral seismic force of the slab is directly borne by the basement exterior wall. However, basements are often used as parking or loading/unloading spaces so that the vibration induced by vehicle pass-bys may affect the equipments. Although the full height RC partition wall can be used to reduce the vibration and it is also effective to keep the equipments far away from the lane, the result should be confirmed with floor vibration analysis. In this paper, the moving load analysis in SAP2000 is applied to evaluate the floor vibration induced by vehicle traveling inside the building. The publication of Steel Construction Institute: Design of Floor Vibration － A New Approach (SCI P354) is referred as a guideline for structural simulation of the composite floor deck which is commonly used in steel structures. This paper contains simulation of moving load, modeling of composite floor deck and calculation of the generic vibration criteria which is commonly used for high-tech facilities. Finally, an example, design of floor vibration in an animal research facility, is provided to illustrate the design details.

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