拆卸式輕隔間牆之受震行為研究

Seismic Performance of Demountable Architectural Partitions without Top Restraints

In this study, the partition wall systems of interest are demountable: comprised of rigid panels clipped on steel light gage framing, glazed panels and doors to create an office space. Their bottom railings are attached to carpeted floors with adhesive carpet fastening strips. Shake table tests were conducted to study the overall performance of these demountable architectural partitions (DAPs) and verify their seismic capacities. Two specimens, with the basic plan geometry of a C-shape 3m x 4m x 3m and a height of 2.6 m, were tested at the Structures Laboratory of the École Polytechnique de Montréal, Canada. The inputs are unidirectional and representing the simulated top floor responses of two office building models that match the seismic hazard in Montréal and Vancouver. For comparison, two top floor responses to the Taiwan Chi-Chi Earthquake were also selected as the input. The testing results indicate that with the installation of good workmanship and proper joint detailing, the DAPs can perform with no or only minor damage in over 1.0g Canadian design earthquake inputs. However, they would not likely resist the near fault seismic events such as Chi-Chi, with large peak floor acceleration up to 3.0g and displacement up to 115mm. 本研究主要以足尺之振動台試驗來探討可拆卸式輕隔間牆（DAP）之受震行為。DAP在北美地區被廣泛地應用於辦公室空間，因其具有可拆卸式特性，故能在不破壞室內裝修之前提下，滿足辦公室因功能變更而變動隔間的需求，並且可以重複被使用。DAP之結構系統類似常見之輕隔間牆，主要由C型冷軋鋼構成，藉由調整面板裝修材、玻璃以及門板之幾何配置，可圍封成各種用途之辦公室空間。特別的是，其底部僅藉由地毯粘黏貼條（魔鬼粘）與地毯固定，而頂部則無束制，故具有容易拆卸且重複使用之特性。研究過程利用位於École Polytechnique de Montréal結構實驗室之振動台，並參考一般辦公室空間尺寸，規劃兩組3m x 4m x 3m ㄇ型平面、高2.6 m之DAP試體，探討其耐震能力及地震力傳遞路徑。輸入地震波為：參考2005年加拿大耐震建築規範（NBCC2005），選取數筆模擬加國東、西兩岸震區之地震資料以及兩筆取自台灣921集集地震之震波，並將其輸入兩棟建築物之SAP2000模型中（分別為14層樓及27層樓），得到樓板加速度反應後，單向輸入振動台，進行測試。試驗結果顯示，藉由適當之接頭細部補強以及確實施工，DAP試體可承受超過1.0g之加拿大設計樓板震波，而不發生破壞。然而，由於取自921集集地震之近域樓板震波同時具有大加速度（3.0g）且大位移（115mm）之特性，造成DAP試體在此類具有高破壞力震波之作用下，於試驗中發生嚴重破壞並傾倒毀損。因此，在近斷層強震區，並不建議採用類似DAP系統之輕隔間牆。