利用理論分析之方法求解結構物或隔震、消能元件受地震力作用下之真實反應，是一件相當複雜的工作，由於強震作用下，結構系統將可能進入非線性範圍，當其非線性行相當複雜時，則不易以理論模型模擬此真正非線性行為。利用已發展成熟的「擬動態實驗技術」來觀察非線性元件受地震力作用下的行為為一可靠之方法，由於擬動態實驗技術是以直接量測之回復力大小，來取代理論的數學模型，可避免因數學模擬不正確所引起的誤差，使得地震反應的正確性大幅提高。

本文中將說明所使用之數值計算方法及所需軟硬體介面外，並利用INSTRON 8800萬能試驗機進行慢速擬動態試驗。為了實現這樣的技術，使用NI-PCI6031E訊號擷取卡來做為溝通的媒介，且應用MATLAB之Simulnk工具箱來進行擬動態試驗軟體的相關開發。本研究中選擇試體之反力與反應速度不具明顯關係之降伏型構件(如具有消能機制之鋼片)，並利用標準加載試驗求得數值模型，且嘗試識別出構件之數值模型參數，由標準加載試驗數值模型與慢速擬動態試驗結果進行比較其結果說明慢速擬動態試驗，較能將試體受外力作用之非線性行為完整的描述，於文中也利用修正後加載試驗模，以驗証擬動態試驗方法之正確性。

The nonlinear behavior of a structure under severe earthquake is difficult to predict if the corresponding mathematical model is unknown or complicated to identify. As control hardware and software evolved, the pseudodynamic testing technique is getting more and more mature and can be implemented to observe the dynamic response of a nonlinear component. The step-by-step Newmark explicit integration method is applied together with the help of NI-6031E data acquisition card and INSTRON 8800 material testing machine to conduct the experimental task. The restoring force of the nonlinear specimen is measured and fed back to the numerical model to predict the displacement of next step.
In order to construct a pseudodynamic testing apparatus, the SIMULINK toolbox and the Real-Time Window Target package provided by the MathWorks are integrated to serve as the communication medium to the INSTRON 8800 controller. A few critical calibration procedures are also suggested in this study to ensure the precision and accuracy of experimental measurements that will consolidate the results of a typical pseudodynamic testing. Some critical parameters of a nonlinear hysteretic model of the simple buckling restrained component (SBRC) are identified based on the result of standard loading protocol suggested by AISC. The simulated responses subjected different earthquake excitations are compared with the experimental data measured from a series of pseudodynamic testing on these SBRC specimens. The results show that the identified hysteretic model requires some modifications to conform to the real dynamic behavior observed from the pseudodynamic testing.

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