Seismic response behavior of deep flexible underground structures in sand-insights from an experimental–numerical investigation

Keykhosropour, Lohrasb; Lemnitzer, Anne

doi:10.1007/s10518-022-01388-x

Cited by 6 publications

(1 citation statement)

References 25 publications

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“…The study showed that the acceleration response of numerical simulation was consistent with that of a model test, but there were certain differences in the dynamic internal forces of the structure. Keykhosropour et al [33] conducted a numerical simulation study on the seismic response characteristics of deep-buried underground flexible structures in sandy soil and analyzed the effects of internal friction Angle, cohesion, and structural stiffness on the development of seismic earth pressure and wall deformation. Yoo et al [34] developed a dynamic numerical analysis model based on PLAXIS2D and conducted a series of dynamic numerical analyses for deep underground structures under various earthquake conditions.…”

Section: Introductionmentioning

confidence: 99%

3-D Numerical Simulation of Seismic Response of the Induced Joint of a Subway Station

et al. 2023

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In recent times, induced joints have been set along the length of subway stations in order to avoid disordered cracking of the main structures occurring due to temperature stress, concrete shrinkage, creep, or uneven foundation settlement. At present, the use of induced joints in subway station structures is mainly based on engineering experience. The seismic response of induced joints has not yet been well explained, much less mastered. In this study, a 3-D numerical model of a subway station incorporating certain sorts of induced joints is established systematically. Then, the seismic response of those induced joints applied in different positions and various forms has been studied under different seismic waves by varying the spectral characteristics and peak acceleration values of the waves. The results show that the horizontal relative sliding displacement of the structures on both sides of an induced joint increases gradually from bottom to top along the structure of the subway station. While the vertical sliding displacements that occur along the section width are larger at both ends of the induced joints than in the middle. What is more, with an increase in seismic intensity, the horizontal relative sliding displacement becomes larger, while the vertical displacement becomes even smaller. In addition, the relative sliding displacement can be reduced by increasing the residual longitudinal reinforcement ratio of the induced joint. Furthermore, it is discovered that the setting of key grooves at the bottom plate of the induced joint section has a certain effect on controlling the horizontal relative sliding displacement, as well as a significant effect on preventing the vertical relative dislocation of the structures on both sides of the induced joint.

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Section: Introductionmentioning

confidence: 99%