考慮鋼筋腐蝕影響之RC建築物耐震能力初步評估法

Preliminary Seismic Performance Evaluation Method of RC Buildings Considering the Corrosion Effect of Reinforcement

邱建國(Chien-Kuo Chiu) ； 詹宗翰(Zong-Han Jhan) ； 蔡宜靜(Y-Jing Cai)

《結構工程》 35卷2期 (2020/06) Pp. 21-41

https://doi.org/10.6849/SE.202006_35(2).0002

摘要

本研究參考過去計劃成果以建立鋼筋腐蝕構件之力學評估模型，對腐蝕構件之塑鉸容量進行折減，除進行相關試驗資料之比對與驗證外，根據文獻所收集一般典型校舍及街屋的常用構件尺寸及斷面配筋，計算柱構件於不同劣化程度下之強度折減係數，提供評估人員搭配既有之初步耐震能力評估法使用。換言之，評估人員可參考RC建築物耐久性能診斷技術手冊之建議，依目視調查構件外觀之劣損以判定其劣化程度，並參考本文建議之折減係數修正其強度。本文最後以一既有校舍為範例，考量構件於不同劣化程度下之耐震能力，以國震中心所建立之TEASPA搭配結構分析軟體ETABS進行詳細評估，並與本研究所提供之初步耐震能力評估進行比對，以了解其合適性。

關鍵字

初步耐震能力評估 ； 目視調查 ； 劣化度 ； 鋼筋腐蝕

並列摘要

This research establishes a mechanical evaluation model of a corroded RC member and reduces its plastic hinge capacity on the basis of the past research project. In addition to do the comparison and verification with the relevant experiment data, this research collects the general information of the size of column members and reinforcement arrangement in a typical reinforced concrete building and street house for investigation on the reduction factor of strength. Restated, the reduction factor of strength can be used to consider effect of the deterioration or corrosion in the strength or seismic capacity for a corroded RC column member. Therefore, this work can provide a preliminary seismic performance evaluation method for a corroded RC building structure. Additionally, for a corroded column member, its reduction factor of strength is determined based on the deterioration degree, which can be judged based on the visual inspection of deterioration following the technical textbook of the durability assessment of deteriorating RC building structures. Finally, taking an existing school building for an example, TEASPA which is established by NCREE is used to evaluate the seismic performance considering the corrosion and verify the application of the proposed preliminary seismic performance evaluation method for a corroded RC building structure.

並列關鍵字

Preliminary seismic performance evaluation ； Visual inspevtion ； Deterioration de gree ； Corroded reinforcement