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論文中文名稱:應用壓電感測器於混凝土結構早強評估及健康診斷 [以論文名稱查詢館藏系統]
論文英文名稱:Application of Piezoelectric Transducer to Early-age Strength Monitoring and Health Monitoring of Concrete Structures [以論文名稱查詢館藏系統]
院校名稱:臺北科技大學
學院名稱:工程學院
系所名稱:土木與防災研究所
畢業學年度:102
出版年度:103
中文姓名:蕭珮如
英文姓名:PEI-JU HSIAO
研究生學號:101428024
學位類別:碩士
語文別:中文
口試日期:2014-07-29
論文頁數:107
指導教授中文名:廖文義
口試委員中文名:柴駿甫;邱建國
中文關鍵詞:健康診斷智能骨材早期強度評估混凝土壓電陶瓷電荷放大器
英文關鍵詞:Structural Health MonitoringSmart AggregateCharge Amplifier
論文中文摘要:本論文之主要研究方向為運用智能骨材感測器進行混凝土早期強度評估、混凝土梁及構架試體之健康診斷試驗,研究所使用之智能骨材為以水泥砂漿包裹壓電陶瓷材料所製,利用基本波動力學及壓電材料可激發亦或接收應力波的特性,進行混凝土結構之健康診斷研究。於早期強度評估試驗上探討混凝土強度與壓電振幅訊號的關聯性;混凝土梁試驗與構架試驗皆進行結構健康診斷,前者探討梁試體損壞裂縫之寬度、長度與損壞指標關係;後者試驗針對三座不同材料組成的混凝土構架進行振動台試驗,探討於不同階段地震強度下之壓電振幅訊號與構架試體損壞位置及裂縫之關係,並將激發端之智能骨材分為預埋與後埋兩種方式,在每一次試驗後,量測試體內骨材互相傳遞之訊號,經數值分析得到損壞指標即可判讀各階段試驗損壞程度。本研究驗證了壓電材料應用於混凝土結構物檢測的可行性,結果顯示電壓振幅會隨著早期強度又或者試體的損壞程度越來越小,此為一種創新的檢測方法應用於土木結構領域。
論文英文摘要:In this paper,a water-proof piezoelectric patch with lead wires into a small concrete block,named the smart aggregates,are used for the concrete early-age strength monitoring and and health monitoring of reinforced concrete structures.Base on the wave propagration theory and piezoelectric transducer can be used as actuators to generate high frequency vibrating waves by concrete structures;meanwhile, they can also be used as receivers to detect the waves.During the concrete early-age strength monitoring, we study the relationship between the strength development of concrete structures and the development of harmonic response amplitude from the embedded piezoelectric sensor. Health monitoring are including RC columns subjected to reversed cyclic loading test and shake table test of RC frames. We study the relationship between the cracks of RC beam and the damage index in the former test.The other one, we study the relationship between the development of harmonic response amplitude from different PGA and the cracks of three different kinds of RC frames.By the way, the actuators divided into pre-embedded and post-embedded.By analyzing the wave response,the existence of crack can be detected and the severity can be estimated.The proposed smart aggreegate based approach successfully evaluated the status of concrete
iii
structures. With the increasing number and severity of cracks,the magnitude of the sensor output decrease .An innovative piezoceramic-based approach is developed in concrete civil structures.
論文目次:中文摘要 i
英文摘要 ii
誌謝 iii
目錄 iv
表目錄 vii
圖目錄 ix
第一章 緒論 1
1.1 前言 1
1.2 研究動機與目標 1
1.3 文獻回顧 2
1.4 研究內容 4
第二章 壓電材料基本理論 5
2.1 智能骨材簡介 5
2.2 智能骨材 6
2.3 實驗儀器簡介 6
第三章 混凝土早期強度評估 13
3.1 前言 13
3.2 基本原理 13
3.3 試體製作與試驗過程 14
3.3.1 實驗步驟 14
3.4 試驗結果 15
3.4.1 訊號處理 15
3.4.2 訊號衰減特性與混凝土強度 16
3.5 小結 17
第四章 RC梁之健康診斷 40
4.1 前言 40
4.2 基本原理 40
4.3 試驗試體與儀器 40
4.3.1 試體製作 40
4.3.2 試驗儀器 41
4.4 試驗過程與結果 41
4.4.1 加載方式 41
4.4.2 發射訊號種類 41
4.4.3 訊號量測步驟 42
4.4.4 裂縫發展量測 42
4.4.5 訊號處理 42
4.4.6 訊號分析與損壞指標 43
4.5 小結 44
第五章 RC構架之健康診斷 63
5.1 前言 63
5.2 RC構架試體描述 63
5.2.1 試體製作 63
5.3 RC構架試體之試驗過程與結果分析 64
5.3.1 試驗步驟與過程 64
5.3.2訊號處理 65
5.3.3 訊號分析與損壞指標 66
5.4 RC構架試體之SAP 2000模擬分析 68
5.4.1 結構基本參數 69
5.4.2 非線性參數計算 69
5.4.3 構架EI值調整設定 70
5.4.4 RCF-B試體之歷時分析 70
5.5 小結 71
第六章 結論 103
6.1 實驗結果 103
6.2 實務應用 104
6.3 未來研究方法 105
參考文獻 106
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4. Gu H, Song G, Dhonde H, Mo Y-L and Yan S, “Concrete Early-Age Strength Monitoring Using Embedded Piezoelectric Transducers”, Smart Materials and Structures, vol.15, pp.1837–1845, 2006
5. Gu H, Moslehy Y, Sanders D, Song G, Mo Y-L, “Multi-Functional Smart Aggregate-based Structural Health Monitoring of Circular Reinforced Concrete Columns Subjected to Seismic”, Smart Mater. Struct. ,vol 19 , 065026, 2010
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10. Soh C H, Tseng K K, Bhalla S and Gupta A, “Performance of Smart Piezoceramic Patches in Health Monitoring of a RC Bridge”, Smart Materials and structures, vol.9, pp553-542, 2000
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13. Laskar A, Gu H, Mo Y-L and Song G, “Progressive Collapse of a Two-Story Reinforced Concrete Frame with Embedded Smart Aggregates”, Smart Materials and structures, vol.18, 075001, 2009
14. Saafi M, Sayyah T, “Health Monitoring of Concrete Structure Strengthened with Advanced Composite Materials Using Piezoelectric Transducers”, Composites,
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論文全文使用權限:同意授權於2014-08-27起公開