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碩士論文公告區 |
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| 年度： | 94 | |
| 姓名： | 柯小迪(Xiao –Di) | |
| 論文題目(中)： | 新澆置鋼筋混凝土基礎版受振動擾動後之強度研究 | |
| 論文題目(英)： | The Effects of Vibration on Compressive Strength of Newly Poured Foundation Concrete Pad | |
| 摘要(中)： | ||
| 本實驗製作一系列的試驗項目來驗證地震力對新澆置混凝土基礎版的影響。研究結果顯示新澆置混凝土凝結時間10小時時，受到振動力擾動為震度3級時其折減率小於28%；震度4級時其折減率為28%〜36%；震度5級時其折減率為36%〜46%；震度6級時其折減率為46%〜50%；震度7級時其折減率大於50%。本研究發現新澆置混凝土版在"臨界時間"內受到振動擾動後會導致其抗壓強度嚴重折減，本研究亦發現振動力擾動為震度3級、4級、5級、6級及7級時，其"臨界時間"分別為小於10小時、10小時〜17小時、17小時〜24小時、24小時〜27小時及27〜34小時。此外當振動發生在"微折減時間點"後，則振動對混凝土版強度影響應極為輕微。研究結果顯示當地震強度為3級、4級、5級、6級及7級時此"微折減時間點"分別為小於40小時、40小時〜41小時、41小時〜46小時、46小時〜52小時及52〜60小時。 | ||
| 摘要(英)： | ||
| A series of tests were conducted in order to study the effects of earthquake vibrations at various setting times on compression strength of newly poured concrete foundation pads. The results of the study revealed that when vibrations were imposed at a setting time of 10 hrs. after the concrete was poured, the strength reduction for vibration, which is equivalent to an Intensity 3 earthquake, was less than 28% when compared to no vibration. The reduction is 28-36%, 36-46%, 46-50%, and greater than 50% for Intensity 4, 5, 6, and 7 earthquakes, respectively. The results also indicated that the compression strength of the newly poured concrete pad was severely reduced by vibration at setting times before the "critical time." The "critical time" found from the test results is less than 10 hrs., 10-17 hrs., 17-24 hrs., 24-27 hrs., and 27-34 hrs., for Intensity 3, 4, 5, 6, and 7 earthquakes, respectively. The vibration effects become less significant when they occur after the "critical time." In addition, the vibration effects on the concrete strength become minimal after the "minimal reduction time," which is found to be less than 40 hrs., 40-41 hrs., 41-46 hrs., 46-52 hrs., and 52-60 hrs. for Intensity 3,4,5,6, and 7 earthquakes, respectively. These study results provide preliminary information for future reference and application for earthquake engineering and related topics. |
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| 檔案： | 沒有相關檔案 | |
| 相關連結： | http://ethesys.lib.cyut.edu.tw/ETD-db/ETD-search-c/view_etd?URN=etd-0724106-023101 | |