Analysis of the influence of structural parameters on the vibration in buildings above the subway

The rapid development of underground traffic network and lack of land resources are bringing more and more environmental vibration problems in buildings above the subway lines. To study the influence of the reinforced concrete and soil parameters on vibration in buildings caused by the subway below it, the semiexperimental and semi-numerical analysis method was considered. Firstly, a finite element model of the whole structure consisting of the subway station, the soil and the building above was established. Then the source vibration at the subway track bed was measured. At last, by combining the measured source vibration and the finite element model, vibration in the building above the subway was calculated with the initial designing value and fluctuating by ±20% of reinforced concrete and soil parameters. By comparing the results of vibration calculated in the building, the influence of the concrete and soil parameters on vibration of the building structure was analysed. It could be concluded that: the elastic modulus of the structures has more effect on structural vibration than the damping coefficient; the difference of soil parameters has less influence than that of the reinforced concrete. The conclusions may be helpful for vibration reduction design of buildings above the subway station.