以測試法作結構系統動力特性參數之識別與驗證

Abstract

本論文旨在以一縮尺五層樓鋼架為例，探討測試解與理論分析解的異同之處。 以模態測試法及振動平台進行正弦掃瞄、合成地震波、實際地震波來測試分別求得此結構系統動力特性參數及各樓層之反應後，再以模態分析法預估結構物之反應並與振動平台測試結果來相互比對及驗證。最後與以SAP90、SAP2000、ETABS軟體做二維及三維理論分析解做比較及討論。

The main purpose of this research is to study the difference between the measurement response and theoretical answer using a 5 story scale-down steel structure as model. The dynamic parameters of the structure and response of each floor can be identified either by modal test or by experiment using shaking table. Using all the dynamic parameters obtained, A dynamic model can be set up to predict the response of the structure under certain earthquake. The prediction is compared with the measurement by shaking table to verify the dynamic parameters. Using code 'SAP90' and 'ETABS', the difference of dynamic parameters are also calculated either by two-dimensional model or three-dimensional model. The comparison result between the theoretical calculation and modal testing is discussed in this study.