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<p>To investigate the load-transfer mechanism and deformation behavior of the soil–corrugated steel utility tunnel interaction system under seismic excitation, shaking table tests were conducted on a scaled model of a circular corrugated steel utility tunnel. The acceleration responses of the surrounding soil and the utility tunnel, as well as the dynamic earth pressure acting on the structure, were analyzed. In addition, the Hilbert–Huang transform (HHT) was employed to further examine the characteristics of the acceleration responses. The results indicate that, with increasing seismic intensity, the motion between the utility tunnel and the soil evolves from coherent to incoherent behavior. The energy peak occurs at approximately 3&#xa0;Hz near the pipe crown, whereas it is around 7&#xa0;Hz at the pipe shoulder. The dynamic earth pressures at the pipe shoulder and springline are jointly governed by the horizontal and vertical seismic components, while that at the pipe crown is dominated by the vertical component. HHT-based analyses further show that the structural deformation is mainly induced by low-frequency components; under horizontal excitation, the amplitude at the springline repeatedly reaches high levels, implying a high risk of localized damage. Under horizontal or vertical excitation, the region between the pipe shoulder and springline requires particular attention, whereas under bidirectional excitation, the critical region shifts to the pipe crown and shoulder. These findings provide useful references for the seismic design of corrugated steel utility tunnels.</p>

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Seismic Response Analysis and Energy Identification of Corrugated Steel Utility Tunnel Based on Shaking Table Test

  • 期刊论文

  • 发表日期：

    2026年7月28日

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  • Xihao Ye,
  • Mingzhou Su,
  • Zi Zhu,
  • Kun Lang,
  • Tengfei Li

摘要

To investigate the load-transfer mechanism and deformation behavior of the soil–corrugated steel utility tunnel interaction system under seismic excitation, shaking table tests were conducted on a scaled model of a circular corrugated steel utility tunnel. The acceleration responses of the surrounding soil and the utility tunnel, as well as the dynamic earth pressure acting on the structure, were analyzed. In addition, the Hilbert–Huang transform (HHT) was employed to further examine the characteristics of the acceleration responses. The results indicate that, with increasing seismic intensity, the motion between the utility tunnel and the soil evolves from coherent to incoherent behavior. The energy peak occurs at approximately 3 Hz near the pipe crown, whereas it is around 7 Hz at the pipe shoulder. The dynamic earth pressures at the pipe shoulder and springline are jointly governed by the horizontal and vertical seismic components, while that at the pipe crown is dominated by the vertical component. HHT-based analyses further show that the structural deformation is mainly induced by low-frequency components; under horizontal excitation, the amplitude at the springline repeatedly reaches high levels, implying a high risk of localized damage. Under horizontal or vertical excitation, the region between the pipe shoulder and springline requires particular attention, whereas under bidirectional excitation, the critical region shifts to the pipe crown and shoulder. These findings provide useful references for the seismic design of corrugated steel utility tunnels.