基于HHT研究房屋结构对爆炸地震的振动响应

曾一鑫;白春华;王仲琦

振动与冲击 ›› 2014, Vol. 33 ›› Issue (15) : 71-75.

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PDF(2350 KB)
振动与冲击 ›› 2014, Vol. 33 ›› Issue (15) : 71-75.
论文

基于HHT研究房屋结构对爆炸地震的振动响应

  • 曾一鑫, 白春华,王仲琦
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Vibrating Response of the Residential Structure to Blast Based on HHT

  • ZENG Yi-xin BAI Chun-hua WANG Zhong-qi
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摘要

为了测试房屋结构对爆炸地面振动的响应特征,对房屋结构进行爆炸振动试验。利用希尔伯特-黄变换(Hilbert-Huang Transform)对比分析房屋结构上测到的振动信号与贴近地基的地面振动信号的频谱特征。结果表明:在接近房屋结构固有频率域内,房屋的振动幅度较地面振动有不同程度的放大;放大倍率受到炸药与房屋结构的距离和测试点的高度的影响;在相同高度处,碳纤维加固对水泥砖墙结构的减振效果明显,具有碳纤维加固的墙振动幅度小于相同高度普通墙振动幅度的1/2。

Abstract

To test the characteristics of structural response to the blast vibration of the ground, detonative experiments were carried out on a newly constructed residential structure. By using Hilbert-Huang Transform (HHT), the spectral characteristics of vibrations on the structure are analyzed comparing to that on the ground surface adjacent to the foundation. It turns out that: vibrating amplitude could be amplified on the structure to the ground motion in the frequency bond close to the natural frequency of the structure; Amplification ratio relates to the distance between the blast hole and the structure as well as the monitoring height; while in a same height, vibration in the brick-cement wall decayed obviously when it is reinforced by carbon fiber board, vibrating amplitude in a wall covered with carbon fiber plate is lower than 1/2 times of that in a common wall.


关键词

房屋结构 / 振动响应 / 放大效应 / 减振

Key words

Residential Structure / Vibration Response / Amplified Effect / Vibrating Attenuation

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导出引用
曾一鑫;白春华;王仲琦. 基于HHT研究房屋结构对爆炸地震的振动响应[J]. 振动与冲击, 2014, 33(15): 71-75
ZENG Yi-xin BAI Chun-hua WANG Zhong-qi. Vibrating Response of the Residential Structure to Blast Based on HHT[J]. Journal of Vibration and Shock, 2014, 33(15): 71-75

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