由於目前業界實務上所使用的均布危害度反應譜(UHS, Uniform Hazard Spectrum)，是由不同週期之危害度曲線識別出對應於某一特定年超越機率下之譜加速度反應譜值所相連而成的反應譜，由於各週期之UHS反應譜譜值均來自不同地震規模與距離的貢獻，因此其譜型較缺乏真實性，若用於作為篩選地震歷時之目標反應譜，所篩選出之地震歷時將過於保守，進而影響後續的結構分析。
針對以上之情況，本研究利用台灣地震資料庫發展出一套適用於台灣的規模相依之譜加速度相關係數模型，用於建置台灣條件式均值反應譜(CMS, Conditional Mean Spectrum)作為目標反應譜進行地震歷時篩選，以改善UHS於目標週期外反應譜譜值過於保守之問題，也較符合台灣地震的真實情況。同時以台灣建築物耐震設計規範與美國規範ASCE 7-16對於輸入地震之不同的要求，作為篩選地震歷時組之不同條件，篩選出三個不同的地震歷時組進行單自由度系統與實際隔震案例的非線性動力歷時分析，並對分析之結果進行比較與討論。
本研究也提出了一考量地震事件之多元性的地震歷時篩選程序，該程序可確保所篩選之地震歷時組並不會被單一地震事件所主導，進而考量不同地震事件的震源特性以及場址條件。同時該篩選程序也可根據使用者建立篩選之限制條件與目標反應譜，篩選出符合使用者需求之地震歷時群組。

Nonlinear dynamic response history analysis is requested in the Taiwan seismic design code for buildings. The uniform hazard spectrum (UHS) determined by probabilistic seismic hazard analysis is commonly adopted as the target response spectrum for selecting input ground motions. However, doing so is not a quite reasonable approach, since the spectral response at the period of interest for some selected ground motions may be overestimated. Adopting the conditional mean spectrum (CMS) is an alternative way to determine the target response spectrum for selecting input ground motions, which is also recommended in ASCE/SEI 7-16. The concept is to provide an expected response spectrum with conditioned on a design spectral acceleration value at the period of interest. Therefore, this study aims to propose a complete tool for selecting input ground motions based on CMS or UHS. First, the magnitude-dependent correlation coefficient model based on the Taiwan ground motion database is developed through performing sensitivity analysis. The CMS determined using the model can effectively reflect the characteristics of ground motions recorded in Taiwan. Then, a ground motion selection program based on the greedy algorithm is developed. Note that three ground motions, at most, selected from a single earthquake event is an additional criterion for considering diversity of the selected ground motions. Lastly, the requirements for ground motion selection specified in Taiwan seismic design code for buildings and ASCE/SEI 7-16 are considered for numerically examining the nonlinear dynamic responses of single-degree-of-freedom systems with different isolation periods and a practical isolated building with different combinations of ground motion inputs. The numerical results demonstrate that adopting CMS is indeed a more reasonable approach for selecting input ground motions. In addition, the requirement for ground motion selection specified in Taiwan seismic design Code for buildings may be slightly stricter than that in ASCE7-16.

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