鋼造建築結構耐震能力之詳細評估及其檢核

隨著時代的演進與規範的與時俱進，既有之鋼構造建築結構亦可能耐震能力不足，需要耐震能力評估與補強。鋼構造詳細評估法為延續鋼筋混凝土建築物耐震能力詳細評估方法之原理，以容量震譜法與非線性靜力側推分析為基礎，並使用國內工程師普遍使用之ETABS程式進行非線性靜力側推分析。本文參考ASCE 41-13，檢核其非線性鉸之合理性及適用性，進而修訂為本土化之非線性鉸參數。側推分析得容量曲線（結構基底剪力與屋頂位移之關係）後，本文進而提出其檢核之方法，包括結構之勁度（容量曲線之斜率）及最大基底剪力，以確認側推分析結果之合理性，避免工程師與分析程式溝通不良，繼而出現系統性之錯誤，而工程師又未能即時察覺分析結果有誤，則可能嚴重誤判評估結果，傷及結構所有權人及使用者之權益。最後，以一案例進行耐震能力之詳細評估，接著檢核評估結果，確屬合理。

關鍵字

鋼構造；非線性鉸；側推分析；耐震能力詳細評估方法

並列摘要

With the evolution of the times and the development of the code, the existing steel structures may also be insufficient in earthquake resistance, which need to be evaluated and reinforced. The detailed evaluation method of steel structure is a continuation of the principle of the detailed evaluation method of seismic capacity of reinforced concrete buildings. It is based on the capacity spectrum method and nonlinear static pushover analysis by using ETABS program. In this paper, the rationality and applicability of the nonlinear hinge are checked by referring to ASCE 41-13. After the capacity curve (the relationship between the structural base shear and the roof displacement) is obtained from the pushover analysis, this paper further proposes the checking method, including the structural stiffness (the slope of the capacity curve) and the maximum base shear, so as to confirm the rationality of the pushover analysis results, and avoid the poor communication between the engineer and the analysis program, which leads to systematic errors. If the engineer fails to detect the error of the analysis result immediately, he may misjudge the evaluation result seriously. Finally, a case is used to evaluate the seismic capability in detail, and then the evaluation results are verified to be reasonable.

並列關鍵字

steel structure ； nonlinear hinge ； pushover analysis ； detailed evaluation method of seismic capacity

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鋼造建築結構耐震能力之詳細評估及其檢核

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