Shaking Table Tests on the Seismic Response of Symmetrically Integrated Underground Stations

Abstract

This paper focuses on the seismic response of symmetrical underground subway stations to seismic waves with varying frequencies and peak ground accelerations (PGAs), essential in light of growing urban underground transit systems. A 1/40 scale station model was subjected to seismic simulations using waves from the Wenchuan and Tangshan earthquakes and an artificial wave spanning 0.1 g to 0.5 g PGAs. Shaking table tests revealed that seismic impacts divide at PGA = 0.3 g; high-frequency waves affect structures more below this threshold, while low-frequency waves have more impact above it. The columns on the third basement level responded more to seismic activity, particularly at their base. The study recommends prioritizing the seismic design of these columns during station construction, especially in earthquake-prone zones. Understanding the dynamic effects of different frequencies and amplitudes is crucial for selecting and reinforcing materials and structural designs to enhance seismic resistance.

Correlation Analysis of Tunnel Deformation and Internal Force in the Earthquake Based on Tunnel Inclination

“…Kobe's major subway stations were also badly damaged, and the subway tunnels suffered minor damage. The Chi-Chi earthquake [7][8][9] in Taiwan in September 1999 and the Wenchuan earthquake [10,11] in May 2008 also caused some damage to underground structures [12][13][14].…”

Correlation Analysis of Tunnel Deformation and Internal Force in the Earthquake Based on Tunnel Inclination

“…Kobe's major subway stations were also badly damaged, and the subway tunnels suffered minor damage. The Chi-Chi earthquake [7][8][9] in Taiwan in September 1999 and the Wenchuan earthquake [10,11] in May 2008 also caused some damage to underground structures [12][13][14].…”