台灣位處環太平洋地震帶，地震引致之災害時有所聞，由於舊有建築物是以當時設計時所採行之規範，已不符合現今規範需求，且台灣老舊房舍甚多，加上多數民眾缺乏耐震的觀念，遂政府於89年6月16日推動「建築物實施耐震能力評估及補強方案」，期盼先以公有建築物之執行，而後再逐步擴及私有建築物。
本研究係以台北市某大樓作為研究案例，由於本大樓屬「建築物耐震設計規範及解說」第一類建築物，故有其執行之必要。研究方向原則採行美國既有建築物耐震評估與補強規範ASCE 41-13「Seismic Evaluation and Retrofit of Existing Buildings」之耐震評估及補強流程，並輔以我國「建築物耐震設計規範及解說」之條文規定，檢視本大樓結構之耐震評估及已完成結構補強之適切。本大樓曾於民國97年完成耐震詳細評估，並於民國99年完成耐震補強，由於當時評估之際所採行之規範與現行規範不同，本研究亦提出其差異後之比較，可提供工程師引用不同年代規範之參考。經比較前後規範，二者最大差異為本建築物工址位於台北盆地微分區之台北三區，經規範修改為台北二區，此一結果導致加速度值的改變，進而直接造成設計水平地震力及垂直地震力之增加，後再深入檢討計算，所幸仍可滿足現行規範需求。
本大樓經詳細評估後，發現Y向崩塌地表加速度稍嫌不足，且少部分構件變形能力亦不足，故採用液態黏滯阻尼器(Fluid Viscous Damper, FVD)作為其能量消善裝置，並針對少部分變形能力不足之構件以局部焊接鋼板方式補強，以達結構耐震補強之目的。

Taiwan is located in the Pacific seismic belt (the Pacific ring of fire). Severe and disaster-causing earthquakes have been frequently occurred. Many existing buildings in Taiwan were designed upon the older specifications and standards and no longer sufficient to the current standards. The general public still lacks for the concept of seismic structures and structural safety. In consequence, Taiwanese government has tried to carry out the project of "The promotion of the seismic evaluation and retrofit of existing buildings" since June 16, 2000. The goal of the project was to promote and popularize the seismic evaluation and retrofit of the existing buildings, and the public buildings were strategically implemented first followed by the private buildings later.
The research performs a case study of seismic assessment and seismic retrofit on an existing public high-rise steel building located in Taipei, which belongs to the first type of buildings per "Seismic design specifications and commentaries for building structures". The main objective of research is to proceed and examine the seismic assessment and retrofit of the considered building through the procedures and methodology specified in ASCE 41-13, "Seismic evaluation and retrofit of existing buildings", to fulfill the specifications of the Taiwanese seismic code, "Seismic design specifications and commentaries for building structures". It should be noted that a detailed seismic evaluation of the considered building in the study has been performed back in 2008, and the seismic retrofit of the building has been completed in 2010. Considering the specification at the time of the seismic evaluation and retrofit are different from the latest or current specifications, the study compares the influences of the differences of the specifications between two specified times for providing engineers good references for the future applications. Upon the comparison, the biggest difference between the older and latest codes is that the building originally belongs to the level-3 zone of Taipei in Taipei basin per the older codes, and it was changed to level-2 zone of Taipei per the latest codes. As a result, both of the horizontal and vertical seismic loads were significantly enlarged. After examining and perform the seismic assessment of the study, the considered building could, fortunately, still meet the requirements of the current codes.
Based on a detailed examination, it was found that the ground accelerations of lateral collapse in Y-direction of the building was slightly insufficient, and a small number of structural members was insufficient in strengths. In consequences, fluid viscous damper (FVD) devices were determined to be used for increasing damping and reducing the seismic loads, and a few of members with insufficient strengths were reinforced by widening or thickening the flanges of the members so as to achieve the seismic retrofitting purpose.

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