连续侧向冲击作用下钢筋混凝土管动力响应试验研究

杨金辉1,2,胡少伟1,3,叶宇霄2,娄本星2,明攀2,王思瑶1,2

振动与冲击 ›› 2022, Vol. 41 ›› Issue (2) : 281-289.

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (2) : 281-289.
论文

连续侧向冲击作用下钢筋混凝土管动力响应试验研究

  • 杨金辉1,2,胡少伟1,3,叶宇霄2,娄本星2,明攀2,王思瑶1,2
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Experimental study on the dynamic responses of reinforced concrete pipes under continuous lateral impact

  • YANG Jinhui1,2, HU Shaowei1,3, YE Yuxiao2, LOU Benxing2, MING Pan2, WANG Siyao1,2
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摘要

为了揭示钢筋混凝土管在连续侧向冲击荷载作用下的破坏机理,完成了6个钢筋混凝土管的横向冲击测试,考虑了不同落锤高度、冲击次数以及简支、固支两种约束形式对钢筋混凝土管侧向冲击动力响应的影响。提出了冲击力和跨中变形的预测公式并采用试验数据进行了拟合,得到了不同冲击速度、冲击次数对管道冲击力峰值和跨中位移的变化规律。采用吸能系数来量化评价管道承受侧向撞击时的吸能能力。结果表明:固支约束管道变形破坏显著好于简支约束试件,承受多次侧向撞击后,吸能系数增大,抗冲击变形能力明显下降。

Abstract

To reveal the failure mechanism of reinforced concrete pipes under continuous lateral impact load, the transverse impact test of 6 reinforced concrete pipes was completed, taking into account different drop hammer heights, impact times, and two restraint forms of simply supported and fixed supports. Influence of the dynamic response of concrete pipe lateral impact. The prediction formulas of impact force and mid-span deformation were put forward and fitted with test data. The variation law of the peak impact force and mid-span displacement of the pipeline with different impact speeds and impact times was obtained. The energy absorption coefficient is used to quantify and evaluate the energy absorption capacity of the pipeline when subjected to lateral impact. The results show that the deformation and damage of the fixed-supported constrained pipeline is significantly better than that of the simply-supported constrained specimens. After being subjected to multiple lateral impacts, the energy absorption coefficient increases, and the impact deformation resistance decreases significantly.

关键词

钢筋混凝土管 / 连续侧向冲击 / 动力响应

Key words

Reinforced concrete pipe / continuous lateral impact / dynamic response

引用本文

导出引用
杨金辉1,2,胡少伟1,3,叶宇霄2,娄本星2,明攀2,王思瑶1,2. 连续侧向冲击作用下钢筋混凝土管动力响应试验研究[J]. 振动与冲击, 2022, 41(2): 281-289
YANG Jinhui1,2, HU Shaowei1,3, YE Yuxiao2, LOU Benxing2, MING Pan2, WANG Siyao1,2. Experimental study on the dynamic responses of reinforced concrete pipes under continuous lateral impact[J]. Journal of Vibration and Shock, 2022, 41(2): 281-289

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