Seismic response analysis considering interaction between subway tunnel and civil air defense basement
MAO Kunming1, ZHAO Kai2, ZHU Liming2, ZUO Xi1, CHEN Lei3
1. Architectural Engineering Institute, Jinling Institute of Technology, Nanjing 211169, China;
2. Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing 210009, China;
3. China United Engineering Corporation Limited, Hangzhou 310052, China
Abstract：Based on the software ABAQUS 64 CPU explicit parallel computing cluster platform, taking underground structures near Nanjing metro line 4 drum tower station as the background, a 3D refined finite element model was built for a deep soft soil-subway tunnel-civil air defense basement coupled system to numerically simulate its seismic responses underexcitations of near-field Wenchuang earthquake Qingping wave, far-field Mexico one and Nanjing artificial seismic one with the exceedance probability of 3% within 100 years, respectively. The results showed that the damage value of the place near “penta-centric circle” tunnel’s spandrel and haunch arc joint is the maximum, plastic deformation produced causes sudden changes to appear on the structural relative displacement curve; the damage level is the most serious at roof and floor of basement, top and bottom of side wall, especially, basement turning place, the rest places are safer; the relative displacement curve of civil air defense basement is smooth and it monotonically rises along the height; compared with the tunnel, though damage values of civil air defense basement’s local areas are slightly larger, their relative displacements are smaller; civil air defense basement causes damage values of tunnel’s local areas to slightly increase while the range of large relative displacement obviously decreases; the influence of tunnel on civil air defense basement has no obvious law.
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