Home > Archive>Volume 43, Issue 2, 2023 >395-404. DOI:10.13409/j.cnki.jdpme.20211103002
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Quantitative Analysis of Soil Damage in Ground Fissures Site under Seismic Action
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TU435

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    Abstract:

    To investigate the damage characteristics and change laws of ground fissures sites under earthquakes， the shaking table model test on soil was designed and completed， based on the ground fissures site of f4 in Xi'an. The damage process of the ground fissures site was analyzed by the mea-sured data in soil， based on the Hilbert margin spectrum. The results showed that：(1)The inconsis-tent deformation of the hanging-wall and footwall of the ground fissures site leads to tensile stress on both sides of the main fissure. Thus， the main fissure gradually cracked and expanded， and the crack surface was in a sawtooth shape. The number of secondary fissures was more than that on the foot-wall.(2)The development law of damage index was consistent with the experimental phenomenon， indicating that the damage quantification method was suitable for detecting the damage development of ground fissures sites under earthquakes.(3)Distribution laws of damage index and peak acceleration on the surface were highly consistent. All parameters reached the maximal value at the fissure， and the peak value gradually decreased from the main fissure to the two sides， showing “hanging-wall/foot-wall effect”. The damage state of soil was related to the input peak acceleration， soil type and other factors.

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ZHANG Chao, KANG Jiawang, XIONG Zhongming, QIU Xiaoyu, HUANG Zhengdong. Quantitative Analysis of Soil Damage in Ground Fissures Site under Seismic Action[J].,2023,43(2):395-404

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