在全球數位化浪潮席捲之下，數位分身技術已逐漸擴展到各個產業應用，數位分身為實體產品之虛擬分身，藉由感測器所量測之實體資料，提供給軟體世界中的虛擬分身，可即時監控實體產品狀態，以便精準快速反應各種變動情況，而本文將數位分身之概念延伸至隔震建築中，透過地震儀量測資料識別花蓮慈濟醫院急診大樓之簡化等值參數，而此簡化等值參數又可分為隔震元件參數以及上部結構系統參數，隔震元件參數透過等值慣性力遲滯迴圈並根據理論雙線性模型之特性迴歸預估而得，並於雙線性模型中加入液流黏性阻尼器，模擬對隔震元件阻尼效應之影響，上部結構系統參數則是透過 OKID/ERA 系統識別技術識別而得，為配合結構分析常用之分析軟體設定，於文中提出建議之 ETABS 模型等值樓層勁度，綜合以上兩類等值模型參數，利用 ETABS 建立花蓮慈濟醫院急診大樓之簡化數位分身模型模擬真實結構物之行為，並將模型預估反應與真實量測資料相互比較，探討其適用性與正確性。

Under the wave of global digitization, digital twin (DT) technology has been gradually extended to various industries. DT is a virtual model of a physical entity. The data measured by the sensors are provided to the virtual model in the software world. The states of the physical entity can be monitored in real-time so that the various changes can be accurately and quickly grasped. In this paper, the concept of DT is extended to the baseisolated building and the simplified equivalent parameters of the emergency building of Hualien Tzu Chi hospital are identified through the measurement data. The simplified equivalent parameters can be divided into the parameters of the isolation and the parameters of the superstructure. The parameters of the isolation are estimated through the equivalent inertial force hysteresis loop with the characteristics of the theoretical bilinear model. In addition, the damping effect of the isolation is simulated by adding the fluid damper (FD) to the bilinear model. The parameters of the superstructure are identified by OKID/ERA system identification technology. To meet the customary setting of ETABS software, the suggested equivalent floor stiffness of the ETABS model is proposed in the paper. Based on the two types of equivalent model parameters mentioned above, a simplified DT model of the emergency building of Hualien Tzu Chi Hospital was established by ETABS. Then it can simulate the behavior of the real structure and compare the predicted response of the model with the real measurement data to discuss its applicability and correctness.

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