以等效完美彈塑性容量曲線檢核結構耐震詳細評估結果

CONFIRMATION OF DETAILED EVALUATION RESULTS BY EQUIVALENT ELASTIC PERFECTLY PLASTIC CAPACITY CURVE

鍾立來(Lap-Loi Chung) ； 賴昱志(Yu-Chih Lai) ； 邱聰智(Tsung-Chih Chiou) ； 王佳憲(Jia-Xian Wang) ； 李梓綸(Tzu-Lun Lee) ； 鄧凱文(Kai-Wen Teng)

《中國土木水利工程學刊》 34卷2期 (2022/04) Pp. 137-150

https://doi.org/10.6652/JoCICHE.202204_34(2).0004

摘要

欲對建物之耐震能力進行評估，或採初步評估，或採詳細評估（即側推分析）。工程師通常透過輔助程式及結構分析軟體進行詳細評估，評估方法及結構分析軟體日新月異，對於建築物之耐震詳細評估幫助極大，但除分析軟體之輔助外，專業人員亦需對分析結果進行檢核，避免於模型或計算有誤，導致分析結果與實際情形不相符等現象。本文將容量曲線進行雙線性化，並以等效雙線性曲線之降伏點對容量曲線進行正規化，依序可求得正規化基底剪力強度、等效週期、阻尼比、阻尼修正係數、正規化需求譜加速度、正規化容量譜加速度等對應其韌性比之關係。本文先以完美彈塑性之容量曲線計算出前述關係之理想解，並分別以一短週期結構及一中長週期結構實際案例進行分析，將理想解與實際值進行比較，其差異不大，理想解之數據可供專業人士於詳細評估後進行檢核使用。

關鍵字

完美彈塑性 ； 容量曲線 ； 詳細評估 ； 耐震評估

並列摘要

To conduct seismic evaluation of buildings, engineers may use preliminary assessment method or detailed evaluation method. Engineers usually use auxiliary program and structural analysis software to carry out detailed evaluation. Methods and software become more and more accurate and user friendly. However, engineers still need to make sure whether the result is correct to avoid any mistakes while building structure model or setting model information. The article is to transform the capacity curve into bilinear one, and normalizes each step of pushover analysis by the yielding point of bilinear curve. Relation of equivalent base shear, equivalent period, damping ratio, correction factor of damping ratio, demand of spectrum acceleration, and capacity of spectrum acceleration to ductility can also be normalized for the idealized bilinear curve. The article first uses linear-elastic-perfect-plastic curve to evaluate ideal solutions, and uses two building cases to compare the results of detailed evaluation with ideal solutions. The comparison of building cases and ideal solutions shows that the values of ideal solution can be used to compare with real structural buildings to confirm the results of detailed evaluation.

並列關鍵字

elastic perfect plastic ； capacity curve ； detailed evaluation ； seismic evaluation

參考文獻

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