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    题名: 新澆置鋼筋混凝土梁受反覆荷重之影響;The Influence of Reversed Cyclic Loading on Newly Poured Reinforced Concrete Beams
    作者: 郭恆維;Heng-Wei Kuo
    贡献者: 土木工程研究所
    关键词: 握裹應力;地震;反覆荷重;新澆置混凝土;experiment;seismic effect;maturing concrete;bond behavior
    日期: 2002-06-14
    上传时间: 2009-09-18 17:11:11 (UTC+8)
    出版者: 國立中央大學圖書館
    摘要: 本研究主要是利用實驗方式來瞭解新澆置混凝土結構震後工程性質影響。實驗主要是利用混凝土早期齡期一至七天之鋼筋混凝土梁試體受模擬地震力擾動方式,其混凝土表面受震有明顯裂縫,來探討結構之混凝土強度與鋼筋握裹力減損情形。由於本研究之實驗方法承屬初始階段,其結果僅供工程界作參考,或者提供往後進一步相關研究之參考。 主要結果顯示,結構之混凝土強度受地震擾動而減損情況比鋼筋握裹行為受損還來得嚴重。本研究亦利用傳統RC斷面之彎矩與曲率分析,來評估受損結構韌性狀況,其分析結果大致與實驗吻合。因此,建議新澆置混凝土結構物受地震擾動後,除了觀察混凝土表面裂縫型式及寬度之外,應利用現場混凝土試體鑽心資料配合彎矩與曲率的分析來檢核結構物強度與耐震行為。 The main purpose of this research was to investigate the effect of seismic vibration on maturing reinforced concrete structures by means of experimental study. The laboratory program was performed to observe concrete strength reduction and bond degradation of reinforcing bars in tested concrete beams subjected to simulated seismic loading when concrete was maturing at the age of one to seven days. As an outgrowth of the initial test experience, the experimental information can be somehow referred to find a solution in engineering problems related to the study or to expand the further test study. General results indicated the condition in concrete strength reduction caused by seismic disturbance was more severe than that in bond strength degradation of beams bars. It was recommended that crack patterns and core concrete strength could be provided to examine the structural damage due to seismic effect on early-age concrete. Meanwhile, the ductile variation of beams can be briefly evaluated by means of moment-curvature analysis.
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