結構體受地震力的影響，在線性行為下，可以依照結構體勁度推算出相關反應行為，當地震力上升造成結構進入非線性行為，其結構勁度已然改變。非線性動力有限元素分析根據結構體降伏後的行為，適時修正結構體勁度，做出有效且精確地分析。
本文將透過有限元素法之電腦輔助工程分析軟體 ANSYS 分析結構體材料達到降伏進入非線性動力行為的反應，諸如：應力、應變、位移、速度及加速度，相關反應在地震力持續放大的影響。另外，分析、比較加裝消能元件-液流阻尼器所提供結構體體額外的耐震能力，並且比較各種反應之控制率。

Linear dynamic analysis is usually applied to structures before yielding occurred while stiffness acts major role in the responses. The purpose of the thesis is to investigate the nonlinear dynamic properties of the structures. A cantilever with a damper installed at its free end and loaded by El Central earthquake is analyzed. Software package ANSYS is used throughout the analysis to find the responses, such as stress, strain, displacement, velocity, acceleration,…etc., of the structures when severe excitations are applied. Control effects according to various damping functions are then displaced in detail to show the aseismatic capacity of the system.

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