研究生: |
李元瑞 Yuan-Ruel Li |
---|---|
論文名稱: |
考慮局部腐蝕影響下之RC填充牆力量位移曲線研究 Study on the Fore-Displacement Relationship Curve of an RC infilled Wall Considering the effect of Localized Corrosion |
指導教授: |
邱建國
Chien-Kuo Chiu |
口試委員: |
廖文義
邱聰智 鄭敏元 |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 營建工程系 Department of Civil and Construction Engineering |
論文出版年: | 2023 |
畢業學年度: | 112 |
語文別: | 中文 |
論文頁數: | 257 |
中文關鍵詞: | 鋼筋混凝土牆 、開孔牆 、鋼筋腐蝕 、老劣化 、強度折減係數 、勁度折減係數 |
外文關鍵詞: | RC Walls, Oprning-Walls, 、Reinforcement Corrosion, Strength reduction factor, Deterioration Degree |
相關次數: | 點閱:54 下載:0 |
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本研究以在老劣化中相對於震損較少被提及的鹽害腐蝕影響作為討論,腐蝕並不像震損後有明顯損害現象,然而在時間堆疊下會使其成影響構件力學能力的主因。實驗對象則參考早期臺灣常見低矮型建物中混凝土填充牆與開孔牆,因其相對於現今建築受到鹽害時間相對長所受影響也相對明顯。
實驗沿用姚亭君[1]之無腐蝕牆試體以及張意尚[2]之通電腐蝕方式,以其靜力反覆加載試體之試驗分別作為無腐蝕與腐蝕損失率為 6% 試體作為對照基準。本次實驗設計試體為四座,設計腐蝕量皆為 15%,腐蝕局部位置選擇只影響主壓桿與含有主、次壓桿範圍兩座,另兩座則在中間開孔。同為靜力反覆加載試驗,未開孔兩座將留作後續補強試驗故只施作到強度點過後一個層間位移就停止實驗,而實際腐蝕損失率則取開孔試體其內部腐蝕區域之鋼筋量測實際腐蝕率,並利用目前國震中心建立之輔助程式 TEASPA分析之 RC 側力位移模型為原型,以腐蝕影響之材料性質去修正模擬模型,再利用共九座試體之強度殘存率與勁度衰退比驗證修正後腐蝕模型之合理性。
由試體結果驗證後,腐蝕後 RC 牆構件在力學行為表現上有明顯的退化,而本研究之模擬腐蝕 RC 牆模型可以保守預估 RC 牆之剩餘強度與勁度衰退程度,開孔牆部分也能保守預估,而由於修正原理建立在材料力學上而非實驗數據回歸,故原先無腐蝕 RC側力位移模型若有更新可將本研究作為附件進行討論。
This study discusses the impact of salt damage corrosion, which is less mentioned than seismic damage in aging and deterioration. Corrosion is not as obvious as after seismic damage.
However, under time stacking, it will affect the mechanical capabilities of components. Main reason. The experimental subjects were based on the concrete infill walls and perforated walls that were common in low-rise buildings in early Taiwan. Compared with today's buildings, the impact of salt damage is relatively long and the impact is relatively obvious.
The experiment followed the corrosion-free wall specimen of Yao Tingjun [1] and the electric corrosion method of Zhang Yishang [2]. The test of repeatedly loading the specimen with static force was used as the non-corrosion specimen and the specimen with a corrosion loss rate of 6% as the control benchmark. There are four test specimens designed for this experiment, and the designed corrosion amount is 15%. The selection of local corrosion locations only affects the main pressure rod and the range containing the main and secondary pressure rods. The other two have holes in the middle. It is also a static repeated loading test.
The actual corrosion loss rate is measured by taking the steel bars in the internal corrosion area of the open-hole specimen and using the current auxiliary program TEASPA established by the National Seismological Center to analyze the RC lateral force displacement model: Prototype to modify the simulation model based on the material properties affected by corrosion.
Verified by the test specimen results, the mechanical behavior of the RC wall components after corrosion has been significantly degraded. The simulated corroded RC wall model in this study can conservatively estimate the residual strength and stiffness degradation of the RC wall.
The open-hole wall part It can also be estimated conservatively. Since the correction principle is based on material mechanics rather than experimental data regression, if the original corrosion-free RC lateral force displacement model is updated, this study can be discussed as an attachment.
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