高强钢筋加强混凝土板抗爆性能试验研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (10) : 135-141.

论文

高强钢筋加强混凝土板抗爆性能试验研究

陈万祥 ,2，卢红标1，候小伟1，周布奎3

作者信息 +

Experimental studies on concrete slabs with high-strength reinforcements under blast loading

CHEN Wan-xiang1,2，LU Hong-biao1，HOU Xiao-wei1，ZHOU Bu-kui3

Author information +

文章历史 +

摘要

对4组8块钢筋混凝土板进行抗爆性能试验，研究钢筋类型、配筋率、爆炸荷载峰值等因素对破坏形态、跨中位移、加速度及钢筋应变影响。结果表明，用导爆索代替炸药可获得典型的爆炸冲击波荷载，并能施加预定的均布荷载作用。与普通钢筋混凝土板相比，高强钢筋混凝土板裂缝宽度减小、分布均匀，具有良好的抗爆性能。提高配筋率可明显减小高强钢筋混凝土板位移，配筋率为0.78%时较0.62%时位移减小64.02%；配筋率大于0.62%时加速度时程曲线较一致，高强钢筋混凝土板整体刚度较好；随配筋率增大，钢筋应变峰值、残余应变均明显减小。爆炸荷载峰值对高强钢筋混凝土板的动态响应有显著影响，当荷载峰值由0.0318 MPa增大到0.0945 MPa时，位移峰值、残余位移分别增大3.63倍、4.80倍，加速度峰值增大近3倍。

Abstract

The blast-resistant capacities of 8 concrete slabs with high-strength reinforcements of 4 groups under blast loading are experimental studied. The main factors such as the reinforcement types, reinforcement ratios, peak values of blast loading etc that influencing on the failure models, span displacements, accelerations of RC slabs and the strains of reinforcements are investigated. The experimental results show that the typical blast loading could be derived by substituting detonating cords for explosive charges, and the predetermined uniform blast loading could be applied on the specimens. Compared with common reinforced concrete slabs, the crack widths are decreased and also became uniform, it is indicated that concrete slabs with high-strength reinforcements have good blast-resistant capacities. The displacements of concrete slabs with high-strength reinforcements could be reduced greatly by increasing reinforcement ratios. The displacements with reinforcement ratio of 0.78% are decreased by 64.02% compared with that of reinforcement ratio of 0.62%. The time-history curves of accelerations are consistent each other when reinforcement ratios are greater than 0.62%, it is indicated that there are good global rigidities for concrete slabs with high-strength reinforcements. Both peak values of strains and residual values of strains of high-strength reinforcements are significantly reduced with reinforcement ratios increased. The peak values of blast loading have obvious influences on the dynamic responses of concrete slabs with high-strength reinforcements. The peak values of displacements and the residual values of displacements are increased by 3.63 times and 4.80 times respectively when the peak values of blast loading increased from 0.0318MPa to 0.0945MPa, and the peak values of accelerations are also increased by nearly 3 times.

导出引用

陈万祥,2，卢红标1，候小伟1，周布奎3. 高强钢筋加强混凝土板抗爆性能试验研究[J]. 振动与冲击, 2015, 34(10): 135-141

CHEN Wan-xiang1,2，LU Hong-biao1，HOU Xiao-wei1，ZHOU Bu-kui3 . Experimental studies on concrete slabs with high-strength reinforcements under blast loading[J]. Journal of Vibration and Shock, 2015, 34(10): 135-141

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