Mutual influencing analysis of seismic response of underground and above ground frame structures

With the development of subway construction in China, the scale of exploitation and utilization of underground space is becoming more and more larger. The dynamic characteristics of soil-above ground structure must be changed with the existence of underground structure, and therefore, the seismic ability of above ground structures will be influenced. The calculation models for soil-underground frame structure-above ground structure interaction system are established based on finite element method. The mutual influencing on seismic response of underground structure and above ground structure are calculated and analyzed. The analysis showed that above ground frame structure has little influence on the seismic response of underground structure, while the underground structure has great influence on the seismic of above ground structure. The results in the paper can provide references for the seismic design of underground and above ground structures.