A Modal Analysis of Vibration Isolation Road with Steel Spring Floating Slab

In order to reduce the impact of road traffic load on the low-frequency vibration of the underground space structure of the Panyu Wanbo Business Center in Guangzhou, a new type of vibration isolation road with steel spring floating slab was developed. 3-D finite element models of steel spring floating slab, underground space, floating slab and underground space structure were established by using ANSYS software. A modal analysis of these three different structures was carried out, and transmission ratio further studied. The results showed that: the fundamental frequency of floating slab road is 8.69 Hz; the fundamental frequency of the underground space is 15.69 Hz; the fundamental frequency of the floating slab and underground space structure is 7.33 Hz; the vibration modal of floating slab was mainly in the form of low frequency, and the vibration modal of roof in the underground space mainly in the form of medium and high frequency; the peak value of transmission ratio of the three structures occurred near the first natural frequency, and the ground frequency was mainly in the form of vibration. The maximum transmission ratio of the lower space structure was 0.878 when the steel spring floating slab was added. Steel spring floating slab road had good effects of vibration reduction and isolation.