| 研究生: |
陳世宏 Chen, Shih-hung |
|---|---|
| 論文名稱: |
高強度混凝土三軸壓縮試驗技術與靜動態力學行為 Static and Dynamic Behavior of High Strength Concrete under Triaxial Compression Test |
| 指導教授: |
戴毓修
Tai, Yuh-Shiou 胡宣德 Hu, Hsuan-Teh |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年: | 2009 |
| 畢業學年度: | 97 |
| 語文別: | 中文 |
| 論文頁數: | 127 |
| 中文關鍵詞: | 圍束效應 、分離式霍普金森桿法 、活性粉混凝土 、三軸壓縮 |
| 外文關鍵詞: | confinement effect, SHPB, triaxial compression, RPC |
| 相關次數: | 點閱:134 下載:2 |
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活性粉混凝土是一新型具有高強度與高性能之混凝土材料,因其具有優異的性能,常應用於許多軍事結構體和特殊用途結構物上,故了解混凝土材料的力學行為將有助於結構物之分析。此外,混凝土材料在不同應變率和圍束效應作用下,皆會表現出不同的力學行為。有鑒於此,本研究利用三軸壓縮試驗對活性粉混凝土分別進行靜態與動態之試驗。
研究結果顯示,利用側向包覆材料對混凝土試體提供圍束效應,再藉由外部應變片訊號量測與理論推導,可以了解混凝土試體在多軸應力狀態下之靜態與動態力學行為。在靜態試驗部份,針對不同加載速率、不同鋼纖維含量與不同包覆材料之厚度進行試驗,並提出三軸試驗下之強度預測公式;在動態試驗部份,利用分離式霍普金森桿法對活性粉混凝土在不同衝擊速度和不同包覆材料之厚度進行試驗,並探討材料之力學性能。
最後,將活性粉混凝土受圍束效應下靜態與動態試驗結果做完整地歸納整理,以供未來相關的學術研究以及工程應用上之參考。
Reactive powder concrete (RPC) is a new type with high strength and high performance concrete material. It’s used to many military structures and special purpose construction, because it has excellent performance. There are many helps for structure analysis to understand the mechanical behavior of RPC. In addition, the concrete material under the different strain rates and confinement effects, the behavior of mechanics is obviously different. Accordingly, this study examines the static and dynamic characteristics of reactive powder concrete under triaxial compression test.
Experimental results, it will understand the static and dynamic mechanical behavior under multiaxial stress by using the lateral confined materials to provide the confinement effect and measuring the external strain gage signal. In static part, there are three tests for RPC in different strain rates, different steel fiber volume fractions and different lateral confined material thickness, and find the predict formula of strength for under triaxial compression. In dynamic part, it understands the mechanical performances by using spilt-Hopkinson pressure bar (SHPB) to test RPC that is under different impact velocities and different lateral confined material thickness.
Finally, the mechanical behavior of the reactive powder concrete in confinement effect under the static and dynamic loading is summed up completely and the results of this study can be utilized as a reference in research.
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