中央氣象局公布的地震震度新制中，為了使震度與建物災損程度之間的相關性增加，當震度達五級以上(含)，分級原則將由原本的最大地動加速度(PGA)改為以最大地動速度(PGV)分級；而結構耐震設計仍是以加速度作為設計依據；要確認結構物是否能滿足PGV震度，目前普遍的做法為採用非線性動力歷時分析。惟非線性動力歷時分析目前常遇到的問題為分析時間太長，需耗費許多時間等待程式進行分析，且分析檔案容量太大等等問題。
本研究選用兩筆新建鋼筋混凝土建築案例，利用Etabs2019軟體建置完整與脊骨簡化模型，藉由與完整模型的分析結果比較(包含模態比較與層間變形比較)，觀察脊骨簡化模型於非線性動力歷時分析之可行性與可靠度，另外利用等效線性法(MELM)判斷屋頂最大位移的準確性。
透過證實脊骨模型可一定程度的反應出完整模型於非線性歷時分析的層間變形曲線，加上簡化模型快速分析的優勢，希望可以讓工程師將脊骨模型作為非線性歷時分析快速初評的工具。
另外在475年回歸期設計地震力對應的震度範圍中，不論是採用PGA震度或者PGV震度進行分析，本研究的兩組新建案例最大層間變形皆小於規定要求的2.5%，故推斷對於符合目前設計規範之新建鋼筋混凝土結構物，可同時滿足新制PGV震度下的性能強度。

In the seismic intensity scale introduced by the Central Weather Bureau, to enhance the correlation between seismic intensity and the level of disaster, the classification principle for seismic intensities of magnitude 5 and above has shifted from the previous use of Peak Ground Acceleration (PGA) to Maximum Ground Velocity (PGV). However, seismic design for structural resilience still relies on acceleration as the basis for design criteria. Presently, the widely accepted conversion method between PGA and PGV involves employing non-linear dynamic time-history analysis. Nevertheless, a prevalent issue with non-linear dynamic time-history analysis is the extensive time required for analysis, as well as the large file sizes associated with the analysis process.
This study selected two newly constructed reinforced concrete building cases and utilized the Etabs2019 software to establish both a complete and a simplified spine model. By comparing the analysis results with the complete model (including modal comparison and inter-story drift comparison), the feasibility and reliability of the simplified spine model in nonlinear dynamic time-history analysis were observed. Additionally, the accuracy of determining the maximum roof displacement using the Modal Equivalent Linearization Method (MELM) was examined.
Through validating that the spine model can to some extent reflect the inter-story drift curves of the complete model in nonlinear time-history analysis, combined with the advantages of rapid analysis in the simplified model, it is hoped that engineers can consider the spine model as one of the tools for a quick preliminary assessment in nonlinear time-history analysis.
Furthermore, within the seismic intensity range corresponding to the 475-year return period design earthquake forces, whether using PGA intensity or PGV intensity for analysis, the maximum inter-story deformation in both sets of new construction cases in this study is less than the specified requirement of 2.5%. Therefore, it is inferred that for newly designed reinforced concrete structures complying with current design codes, they can simultaneously meet the performance requirements under the new PGV intensity.

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