鋼筋混凝土建築結構耐久性能診斷與維護管理策略

鋼筋混凝土建築物常因劣化與腐蝕而導致強度降低及使用年限縮減，針對耐久性或安全性不足之建築物，應做出相應對策，但國內尚無鋼筋混凝土建築物老劣化嚴重之耐久或耐震性能定量評估方法。本研究內容包括建築物概要調查、耐久性能初步和詳細診斷三大項，目的為了解劣化主因及選擇適當維護策略，並建立考慮鋼筋腐蝕影響之塑鉸容量修正模型，配合非線性側推分析方法評估鋼筋腐蝕之鋼筋混凝土建築物耐震能力。此外，本研究亦提供柱構件於不同劣化度下之強度折減係數，供耐震能力初步評估使用；換言之，考量耐久性能初步診斷結果便可快速判定結構安全性能。

關鍵字

鋼筋混凝土；耐久性能診斷；腐蝕構件；維護管理策略

並列摘要

The renovation and reconstruction of old and dangerous buildings in urban has been actively promoted by the government. However, there is so far no method for the domestic architects, civil engineers, and structure engineers to quantitatively evaluate the durability or seismic performance of the severely deteriorated buildings, and such that current seismic evaluation does not involve the durability assessment as influencing factors. For these reasons, this study proposes durability assessment for reinforced concrete buildings in Taiwan in order to help the architects, civil engineers, and structure engineers to quantitatively assess the durability performances and remedy strategies of those buildings. This study proposes a model to evaluate the mechanical properties of corroded structural members, in which the seismic resistance of RC buildings is evaluated by the reduced hinge capacities by those corroded structural members and nonlinear pushover analyses. In addition, this study also provides the strength reduction coefficients of the column members under different degrees of degradation for the preliminary evaluations of the seismic resistance; in other words, considering the results of the preliminary evaluations of durability, the safety performance of the structure can be quickly determined.

並列關鍵字

reinforced concrete ； durability performance assessment ； corroded structural members ； seismic resistance

國際替代計量

鋼筋混凝土建築結構耐久性能診斷與維護管理策略

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