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題名 | 高強度鋼纖維混凝土接觸爆炸實驗=Experiment of High-Strength Steel Fiber-Reinforced Concrete Subjected to Contact Explosion |
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作者 | 徐盛基; 洪正偉; 董帥谷; 王耀德; | 書刊名 | 黃埔學報 |
卷期 | 63 2012.10[民101.10] |
頁次 | 頁289-298 |
分類號 | 440.327 |
關鍵詞 | 高強度混凝土; 鋼纖維; 接觸爆炸; High-strength concrete; Steel fiber; Contact explosion; |
語文 | 中文(Chinese) |
中文摘要 | 本高強度混凝土比起一般強度的傳統混凝土可以提供更好的抗爆能力,但是鋼纖維 體積率含量為多少對提升抗爆能力所產生的效能並不明確。在這項研究中,高強度的混 凝土版試體尺寸為50 ×50 ×15cm,添加鋼纖維體積率為0.0、0.5、1.0、1.5%,抗壓強度 控制在75~100MPa 之間,承受了不同重量之球型C4 炸藥,在30、50、65、100、135、 170g 進行接觸爆炸試驗,並對版的正面成坑和背面疤落的破壞範圍進行了研究。對於採 用不同炸藥重量的爆炸試驗,結果顯示,與無添加鋼纖維的版試體相比,鋼纖維體積率 從0.5%增加至1.5%可降低正面成坑直徑35%及深度80%。對於C4(100g)的爆炸試驗, 鋼纖維體積率含量可以控制背面成坑的破壞範圍,試體在體積率超過1.0%以上背面便 無產生成坑的破壞。對於同樣配比的高強度混凝土,添加鋼纖維在材料實驗中可以使抗 壓強度提升16%,劈裂強度提升48%,而在韌性方面顯示添加鋼纖維可使抗彎強度提升 至8%,在爆炸試驗中可減少正面成坑直徑35%及深度80%,而鋼纖維體積率含量可控 制背面成坑的破壞範圍。 |
英文摘要 | High Strength Concrete can provide better blast-resistant capacity than normal strength concrete, but effect of volume fraction of steel fiber is not clear. In this study, volume fractions 0.0, 0.5, 1.0 and 1.5% of steel fiber were considered for high strength concrete slabs with a dimension of 50×50×15 cm. Compressive strength of high strength concrete was controlled within 75〜100 MPa. Slabs were subjected to contact explosion of explosive C4 with a weight of 30, 50, 65, 100, 135 and 170 g. The shape of explosive was spherical. After explosion, crater sizes at front and back sides of slabs were investigated. For explosions of different weights of explosive, the results showed that steel fiber with volume fraction of 0.5% to 1.5% can reduce crater diameter 35% and depth 80% at front side of slabs, compared with slabs without steel fiber. The crater at back side was controlled by volume fraction of steel fiber for 100g C-4 explosive and no crater occurred beyond 1% volume fraction. The compressive strength and splitting tensile strength can be improved respectively 16% and 48% for tests with steel fiber. Besides, the flexural strength can be improved 8% for toughness. For explosion test of high strength concrete with steel fiber, the diameter and depth of front crater decreased 35% and 80%. However, the destructive range of crater at the back side can be controlled by volume fraction. |
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