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研究生:康士龍
研究生(外文):Slong Kang
論文名稱:新澆置混凝土受地震力影響之握裹行為
論文名稱(外文):The Bond Behavior of Newly Placed Reinforced Concrete under Earthquake Effect
指導教授:張明添
指導教授(外文):Ming-Tien Chang
學位類別:碩士
校院名稱:國立中興大學
系所名稱:土木工程學系
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2001
畢業學年度:89
語文別:中文
論文頁數:85
中文關鍵詞:新澆置握裹力地震影響
外文關鍵詞:Newly PlacedBonding ForceEarthquake Effect
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921百年大地震的發生,造成中部地區前所未有的損失,對於一些地震發生前不久才澆注的鋼筋混凝土結構物而言,其混凝土的強度還沒發展完全,造成握裹力的折損。所以為了考量地震後結構物的安全性及其鋼筋混凝土間鍵結的衰退情形,而進行握裹力折損的評估研究。
試驗參考”DS-2082”的試體設計,變化三種試體參數,也就是研究試體在不同的齡期下、受不同的地震強度、其不同鋼筋尺寸握裹力折損的情況。
從試驗的結果發現,澆注8小時後的鋼筋混凝土構件受不同震動強度的擾動,其握裹力並沒有明顯規則的折損。但或許是因為這只是試驗室小試體的試驗,無法模擬整個結構的真實現況,無法考慮到其真正的尺寸效應,建議再做進一步模擬現地真實尺寸的試驗來相比較。
The earthquake of “921’ maked a all-time damage on the center section of Taiwan.For the newly placed reinforced concrete structure under earthquake,the strength of concrete did not develop completely,so the cementation between concrete and reinforcing bars would have some loss and make the bonding force decreased.This study is to evaluate earthquake effects on bonding force in order to consider the safety of structure and the cementation reduction between concrete and reinforcing bars.
The experiment referred to the design of Danishstandard-DS2082.
We changed three parameters to investigate the reduction of bonding force .They are the different artificial earthquakes、various ages and reinforcing bar’s dimension respectely.
Based on the results of this investigation,we find that,the bonding force on reinforced concrete elements after 8 hour’s placed-age havn’t obvious and regular loss.
Probaly this experience is just the case of small dimensions,It cann’t simulation the real situation of whole structures.We suggest to do futher experiences about real dimension simulated in-situ for comparion purpose.
第 一 章 緒 論
1-1前言...................................................1
1-2研究動機...............................................2
1-3 研究目的和範圍........................................2
第 二 章 文 獻 探 討.......................................4
2-1握裹力試驗規劃.........................................4
2-1-1 ASTM C234-91a[5]..................................4
2-1-2 Modified Beam Test (O.J.B.模式)試體規劃[3][9].....4
2-1-3 Danish Standard DS 2082 的試驗規劃-文獻[1][4].....5
2-2握裹的力學機制[9][11][12]..............................6
2-3 握裹破壞模式與傳遞機理[1][3][4].......................8
2-4 握裹強度的影響因素....................................9
2-5 握裹發展長度規範的演變...............................10
第 三 章 試 驗 規 劃......................................13
3-1 圓柱試體試驗.........................................13
3-2方形試體試驗..........................................13
3-2-1 試體參數.........................................13
3-2-2 試體規劃與設計...................................15
3-2-3 試體製作.........................................16
3-2-4 試驗設備.........................................18
3-2-5 試驗方法與步驟...................................18
第 四 章 試驗結果與討論...................................21
4-1圓柱試體試驗..........................................21
4-2 方形拉拔試體試驗.....................................22
4-2-1 拉拔試驗之混凝土破壞模式.........................22
4-2-2 拉拔試驗的結果與誤差主因.........................23
4-2-3 依震動強度排序比較...............................24
4-2-4 依鋼筋尺寸排序比較...............................25
4-2-5 依震動齡期排序比較...............................26
4-2-6 震動對握裹力折損之探討...........................26
第 五 章 結論與建議.......................................28
5-1結 論.................................................28
5-2建 議.................................................29
參考文獻...................................................30
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