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標題: 層間損壞指標敏感度分析及改善策略
Sensitivity Analysis and Improvement Strategy of A Story Damage Index
作者: 李柏翰
Lee, Bo-Han
關鍵字: damage
出版社: 土木工程學系所
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摘要: 本文主要進行以模態參數為基礎之建築結構層間損壞指標(ASDI)於結構參數變異時之敏感度分析,建立敏感度係數,期能了解對ASDI精確度最具影響之結構參數,與其影響範圍,進而訂定結構損壞評估誤差不超過10%時,各模態參數之誤差限制。 此外,本文亦針對系統識別最佳化準則進行探討,主要目的在於分析一般最佳化準則所得結構識別參數之可能誤差範圍,藉此瞭解此誤差對損壞指標評估之影響,最後提出最佳化準則改善策略,提升模態參數識別之穩定性,以增進損壞評估結果之可靠度。
This paper investigates the sensitivity of the modal parameters of the structures and Approximation of Structural Damage Index (ASDI) is used for the performance study. The effective error-ranges are controlled within 10 percent between different modal parameters. On the other hand, this paper also determines the possible error-ranges of the structural parameters between different modes. The effectiveness and performance of ASDI technique is enhanced based on the optimized and improved system identification process. Such optimization procedures improve performance of the system identification techniques and stabilities of ASDI.
其他識別: U0005-2407200711325900
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