Shaking table test and numerical simulation study on a tunnel-soil-bridge pile structure interaction system

Abstract

In this study, the dynamic interaction (SSSI) of a double tunnel–sand–soil–bridge pile system under earthquakes is investigated by conducting a shaking table test in the context of an actual project in Dalian. The dynamic response laws of the structure and site are determined and compared with the results obtained using ABAQUS numerical simulation. In the numerical model introduces, the Kelvin intrinsic model subroutine is introduced, and the equivalent linear method is used to deal with the nonlinearity of the sandy soil in the calculation process. The experimental results are compared with the results obtained using the numerical model to verify the reliability of the numerical simulation. Based on this, eight work­ing conditions are designed, and the interaction law between the structures in the system is investigated through a comparative analysis. The results showed that the tunnel amplifies the dynamic responses of the bridge pile, adjacent tunnel, and far field, while the bridge pile attenuates the dynamic responses of the side tunnel and far field; the presence of both the tunnel and bridge pile increases the internal force of the adjacent structure, and the peak internal force often occurs near the intersection of the structure or at the pile–soil interface.

Energy‐based analysis of seismic damage mechanism of multi‐anchor piles in tunnel crossing landslide area

“…A polystyrene foam board was placed between the tunnel and the two side walls to reduce the effect of boundary seismic reflection on the tunnel structure. A layer of gravel soil with a particle size of 2 cm and a thickness of 5 cm was laid at the bottom of the model box to reduce the relative sliding between the soil and the bottom plate of the box (Xu, 2009).…”

Research on Lateral Load Bearing Characteristics of Deepwater Drilling Conductor Suction Pile

“…However, it is worth noting that the load types considered are limited to combinations of vertical and horizontal loads, lacking consideration for moments. Liu et al utilized a model testing approach to determine the vertical and horizontal load-carrying capacity curves, as well as the V-H composite load-carrying capacity envelope for suction pile foundations [24]. The model test results were then employed to validate the reliability of the numerical simulation results obtained through ABAQUS 2020.…”