Seismic response characteristics of subway stations with induced joints in loess area
Induced joints have been widely used in subway stations in China,but their seismic re-sponse law remains unclear.Based on the previous research,a three-dimensional numerical model of subway stations with induced joints in the loess site was established to study the acceleration response and damage evolution process of the structure under different spectral characteristics and different seismic waves.The results show that the acceleration responses of the structure on the same side of the induced joint are the same.However,those on both sides of the induced joint are notably different,and the peak acceleration on the side with a larger mass is also larger.With the increase in earthquake intensity,the soil-structure dynamic interaction is highly intense.There-fore,the damage degree of subway station structures is deepening,and the damage range is grad-ually expanding.Moreover,the structural damage is serious under the action of low-frequency seismic waves.Meanwhile,the structural damage area at the induced joint section is relatively large,where local damage easily occurs.The results can provide a reference for the further study and engineering design of subway stations with induced joints in the loess area.
万方数据
维普
