以簡化反應譜法分析設備物之動力反應

Abstract

設備物受地震作用產生反應的研究在過去二十多年中已被廣泛研究，重要的設備物如：醫療院所的醫療搶救設備、半導體產業晶圓廠及核能電廠之核子反應爐等建築廠房，與一般樓房建築相比，除了結構型態上之差異，最大的特色在於其生產設備在整體成本中佔了相當大的比例，一旦這些設備系統受震損毀，將會帶給國家相當大的經濟衝擊，並且危害到人民的性命安全。 合成系統最重要也亟需被考慮的為非比例阻尼系統與主結構與設備物的共振與否，故本文首先便對合成系統提出在考慮非比例阻尼與有否共振下計算設備物最大反應的方法。 以往的計算合成系統最大反應，耗時極大，因此本文提出了在線性系統下可簡單地以主結構與設備物基本參數，如：兩者第一振態週期、阻尼比、聯接點位置與作用地震之加速度反應譜，即可估算設備物受地震作用之最大反應。 最後本文在將此法應用於台灣地區視其使用價值。雖然在使用上極其簡單，但其理論嚴謹地卻包含了非比例阻尼與有否共振之情形，因此在最後經過與動力歷時分析的比較，發現誤差尚能接受，且不會出現低估的現象，對於工程師的設計上有著極大的幫助。

The methods for estimate the seismic response of components attached to buildings have been proposed during the last three decades. The important components such as the reverberatory in nuclear power plants and the medical instruments in hospitals maybe more expensive than the primary structure. The important components will make a great economical impact if it is broken by earthquake. The resonance and non-classical damping between sub-systems must be taken into account in the structural analysis of composite system. The approximate formula of this paper was proposed to compute the maximum response of equipments under the resonant and non-classical damped situation. Its application to any given nonstructural component only requires knowing the geometric characteristics, and weights of the nonstructural component and the structure to which it is connected, in addition to the fundamental natural period of the structure and the elastic response spectrum specified for the design of the structure. So it is a simplify method to estimate the seismic response of nonstructural components in buildings.

Finally, presented also are a numerical example in Taiwan that illustrates the application of the method and the results of a comparative numerical study that is carried out to assess the method’s adequacy.