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| 摘要: |
| 应用液压伺服试验机及自制落锤冲击设备进行了三点弯曲试验,在8个数量级的加载速率下,测定了高强混凝土的断裂能.结果表明：高强混凝土断裂能随着加载速率的提高而增大,且在低加载速率范围该趋势温和,在高加载速率范围该趋势显著. |
| 关键词: 高强混凝土 加载速率 落锤试验机 断裂能 |
| DOI： |
| 分类号:TU528.01 |
| 基金项目: |
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| Effect of Loading Rate on Fracture Energy of High-Strength Concrete |
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CAO Yong-zhi ZHANG Sheng-tan MENG Qing-xin
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| Abstract: |
| Three-point bending tests on notched beams of a high-strength concrete have been conducted using both a servo-hydraulic machine and a self-designed drop-weight impact device.The fracture energy(G_F) was measured over a wide range of loading rates,spanning eight orders of magnitude.Under low displacement rates,from 10~(-4) mm/s to 10 mm/s,the tests were performed with the servo-hydraulic machine;from 10~2 mm/s to 10~3 mm/s the drop-weight impact machine was used instead.The results show that the fracture ene... |
| Key words: high-strength concrete loading rate drop-weight impact machine fracture energy |
