SPH-FEM coupled simulation of SSI for conducting seismic analysis on a rectangular underground structure

Liang, Sunbin; Chen, Zhiyi

doi:10.1007/s10518-018-0456-z

Cited by 24 publications

(10 citation statements)

References 46 publications

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“…Kalateh and Koosheh [30] used the SPH-FEM method to simulate the interaction between a convergent-divergent nozzle and cavitating flow, and the results showed that the behaviour of liquid and vapor at the interface matched other numerical and experimental methods. Liang and Chen [31] applied the SPH-FEM method to soil-structure interaction problems during the seismic analysis of a rectangular underground structure, and results indicated that the distribution and magnitude of seismic earth pressure were influenced by the magnitude of soil deformation. Fragassa et al [32] analyzed the effect of air in FSI problems by coupling FEM and SPH.…”

Section: Introductionmentioning

confidence: 99%

Seismic Analysis of a Large LNG Tank considering the Effect of Liquid Volume

Zhao

et al. 2020

Shock and Vibration

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Large Liquefied Natural Gas (LNG) tanks are prone to damage during strong earthquakes, and accurate seismic analysis must be performed during the design phase to prevent secondary disasters. However, the seismic analysis of large LNG tanks is associated with high computational requirements, which cannot be satisfied by the calculation efficiency of traditional analytical techniques such as the Coupled Eulerian–Lagrangian (CEL) method. Thus, this paper aims to employ a less computationally demanding algorithm, the Smoothed Particle Hydrodynamics-Finite Element Method (SPH-FEM) algorithm, to simulate large LNG tanks. The seismic response of a 160,000 m3 LNG prestressed storage tank is evaluated with different liquid depths using the SPH-FEM algorithm, and simulation results are obtained with excellent efficiency and accuracy. In addition, large von Mises stress at the base of the tank indicates that strong earthquakes can severely jeopardize the structural integrity of large LNG tanks. Therefore, the SPH-FEM algorithm provides a feasible approach for the analysis of large liquid tanks in seismic engineering applications.

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Section: Introductionmentioning

confidence: 99%

Seismic Analysis of a Large LNG Tank considering the Effect of Liquid Volume

Zhao

et al. 2020

Shock and Vibration

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“…The phase of high-frequency component at A1 and A15 have a difference of about 180° with that at A17 and A18. The difference in the phase and amplitude of high-frequency component at each structural story is mainly caused by the rotation vibration of the underground structure during earthquake (Liang and Chen, 2019). Figure 12 shows the change in the acceleration of each story from t = 0.6625 s to t = 0.6825 s (Δt = 0.02, which is half of the period of the high-frequency component) in case 2 to illustrate the rotation of underground structure.…”

Section: Seismic Responses Of Soilsmentioning

confidence: 99%

Seismic response characteristics of multi-story subway station through shaking table test

Chen

Huang

Chen

2021

Advances in Structural Engineering

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A series of shaking table tests were carried out to investigate the seismic response characteristics of a multi-story subway station. Dynamic responses, including accelerations of the soils and the underground structure, layer drift, dynamic earth pressure, and lateral deformation of soils were recorded and analyzed. Several seismic characteristics of multi-story subway station structures are figured out. It is found that in addition to the racking deformation, the rotation vibration is observed for the multi-story subway station subjected to acceleration waves. From the viewpoint of frequency, the low-frequency component and high-frequency component of the acceleration response of the subway station represent the translation and rotation component of the multi-story subway structure, respectively. In addition, the rotation vibration of the deep-depth structure leads to the local squeezing and detachment from the surrounding soils alternately at both top and bottom ends of the sidewalls. This results in the hump-shaped distribution of dynamic earth pressure. The racking deformation of the multi-story subway station has a linear relationship with the dynamic earth pressure at a certain area along the sidewall, where the top of hump-shaped distribution of dynamic earth pressure is.

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“…In Eqs. (14)(15)(16)(17)(18)(19)(20)(21), by the ratio of the shear modulus of the medium to that of the lining (μ̃ = μ med /μ lin ), the interaction of the tunnel and the surrounding ground is taken into consideration, as a highly significant phenomenon associated with tunnels [27,28]. For solving the problem based on the derived theoretical solution, a program is developed by using the software Matlab ® .…”

Section: Analytical Solutionmentioning

confidence: 99%

Dynamic Analysis of a Deeply Buried Tunnel Influenced by a Newly-built Adjacent Cavity with a Special Emphasis on the Minimum Seismically Safe Tunnel Distance

Zlatanović

Lukić

Sesov

et al. 2021

Period. Polytech. Civil Eng.

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Contemporary life streams, more often than ever, impose the necessity for construction of new underground structures in the vicinity of existing tunnels, with an aim to accommodate transportation systems and utility networks. A previously uninvestigated case, in which a newly-constructed tunnel opening is closely positioned behind an existing tunnel, referred to as the tunnel–cavity configuration, has been considered in this study. An exact analytical solution is derived considering a pair of parallel circular cylindrical structures of infinite length, with the horizontal alignment, embedded in a boundless homogeneous, isotropic, elastic medium and excited by time-harmonic plane SV-waves under the plane-strain conditions. The Helmholtz decomposition theorem, the wave functions expansion method, the translational addition theorem for bi-cylindrical coordinates, and the pertinent boundary conditions are jointly employed in order to develop a closed-form solution of the corresponding boundary value problem. The primary goal of the present study is to examine the increase in dynamic stresses at an existing tunnel structure due to the presence of a closely driven unlined cavity, as well as in a localized region around the tunnel (at the position of the cavity in close proximity), under incident SV-waves. A new quantity called dynamic stress alteration factor is introduced and the aspect of the minimum seismically safe distance between the two structures is particularly considered.

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SPH-FEM coupled simulation of SSI for conducting seismic analysis on a rectangular underground structure

Cited by 24 publications

References 46 publications

Seismic Analysis of a Large LNG Tank considering the Effect of Liquid Volume

Seismic Analysis of a Large LNG Tank considering the Effect of Liquid Volume

Seismic response characteristics of multi-story subway station through shaking table test

Dynamic Analysis of a Deeply Buried Tunnel Influenced by a Newly-built Adjacent Cavity with a Special Emphasis on the Minimum Seismically Safe Tunnel Distance

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