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首页> 外文期刊>Composite Structures >Response of ultra-high-performance fiber-reinforced concrete beams with continuous steel reinforcement subjected to low-velocity impact loading
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Response of ultra-high-performance fiber-reinforced concrete beams with continuous steel reinforcement subjected to low-velocity impact loading

机译：超高性能纤维混凝土连续梁在低速冲击荷载作用下的响应

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摘要

To investigate the effect of the reinforcement ratio on the flexural behavior of ultra-high-performance fiber-reinforced concrete (UHPFRC) beams under impact loading, a total of four large-sized (200 x 270 x 2900 mm) beams were fabricated and tested using a drop-weight impact test machine. The incident kinetic energy and impact velocity were 4.2 kJ and 5.6 m/s, respectively. A higher reinforcement ratio exhibited lower maximum and residual deflections and better deflection recovery. The test results also indicate that the maximum crack width at a certain drop stage decreased with the reinforcement ratio. A nonlinear analytical model for predicting the impact behavior of a UHPFRC beam was developed using multi-layer sectional analysis and single-degree-of-freedom analysis, and the model was verified through comparison with the experimental results. (C) 2015 Elsevier Ltd. All rights reserved.
机译：为了研究增强比对冲击荷载下超高性能纤维混凝土（UHPFRC）梁的抗弯性能的影响，总共制造并测试了四个大尺寸（200 x 270 x 2900 mm）梁使用跌落冲击试验机。入射动能和冲击速度分别为4.2 kJ和5.6 m / s。较高的增强比显示较低的最大挠度和残余挠度，以及较好的挠度恢复率。试验结果还表明，在一定下降阶段的最大裂缝宽度随增强比的增加而减小。利用多层截面分析和单自由度分析方法，建立了用于预测UHPFRC梁冲击性能的非线性分析模型，并与实验结果进行了比较验证。 （C）2015 Elsevier Ltd.保留所有权利。

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