A nonlinear analysis of dynamic interactions of CFRD–compressible reservoir system based on FEM–SBFEM

Xu, He; Zou, Degao; Kong, Xianjing; Hu, Zhiqiang; Su, Xiaohui

doi:10.1016/j.soildyn.2018.04.057

Cited by 20 publications

(11 citation statements)

References 41 publications

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“…The suggested model was created in the general-purpose finite element software ABAQUS utilizing a coupled Eulerian -Lagrangian (CEL) analysis. To simulate interactions between highly flexible materials and relatively rigid bodies, classic al Lagrangian formulations can be combined with the Eulerian capabilities offered by ABAQUS (Xu et al [17]). The two-way FSI coupling drastically cuts down on time needed to analyze FSI issues.…”

Section: Modeling Techniquementioning

confidence: 99%

“…To study the damage characteristics of dams, Wang et al [16] employed the Lagrange formulation of fluid in the reservoir-damfoundation numerical model. The boundary element method (BEM) has also been used to shed light on the FSI problems in the engineering sectors (Xu et al [17], Liu [18]). The mentioned researcher approved that the seismic response of the submerged bridge members is amplified because of the hydrodynamic pressure effect.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Response of Deepwater Pile Foundation Bridge Piers under Current-wave and Earthquake Excitation

Alsultani¹,

Karim

Khassaf

2022

ETJ

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 The major methods for investigating the interaction between a wave current and an elevated pile cap foundation are discussed.  The changing rule of hydrodynamic pressure with water depths, current speed, wave properties, earthquake amplitudes, and frequencies are presented.  A series of combined current-waveearthquake tests are shown.Pile foundation bridges are structures extending in the middle of the sea, so they are subject to currents, waves, and earthquake forces. This article presents a hybrid simulation that was used with input excitations of different current velocities, wave properties, and earthquake amplitudes to assess the non-linear dynamic behavior of pile foundation bridge piers. Based on the interface between M ATLAB and ABAQUS software, the general formulations of fluid-structure interaction (FSI) under combined current-wave and earthquake loads are derived. Hydrodynamic and earthquake loading is consistently introduced by creating synthetic time histories of combined current-wave actions and spatially variable ground motion.The behavior of the dynamic model of a deepwater pile foundation bridge for the Songhua River in northeast China was adopted as an example of the study. The accuracy of the created model was verified using prior experimental and analytical computations. It is demonstrated how both linear and nonlinear dynamic behavior performs at various water depths under coupled current-wave-earthquake loading conditions. Revealing interesting aspects, particularly in terms of relative displacement, acceleration, shear, and moment response are shown. The results showed that the hybrid model is an efficient of simulating accurate predictions of the hydrodynamic pressure during earthquake actions for structures in coastal areas.

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Section: Modeling Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Response of Deepwater Pile Foundation Bridge Piers under Current-wave and Earthquake Excitation

Alsultani¹,

Karim

Khassaf

2022

ETJ

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“…Multicore parallel technology of the CPU coupled with the GPU is realized in the GEODYNA program, by which the computational capacity of solving a large-scale elasto-plastic analysis with millions of DOFs is provided. The GEODYNA program has been applied to the dynamic analysis of nonlinear structures [26][27][28]45,46,48,[55][56][57][58][59][60][61][62].…”

Section: Polyhedron Sbfem Procedures For Fluidmentioning

confidence: 99%

“…At present, much research on the numerical analysis of the dam-reservoir dynamic interaction under earthquake conditions has emerged. The scope of research covers arch dams [38][39][40][41], gravity dams [41][42][43][44], and concrete face rockfill dams (CFRDs) [45][46][47][48][49]. The hydrodynamic pressure computational methods used in research include FEM, the boundary element method (BEM) and SBFEM.…”

Section: Introductionmentioning

confidence: 99%

“…Lin et al [50] realized an efficient SBFEM-based solution of hydrodynamic pressure in a 3D reservoir by only discretizing the two-dimensional (2D) interfaces between the reservoir water and the dam's upstream face, thus saving many DOFs, improving computational efficiency, and facilitating large-scale numerical analysis. Using this method [50] to simulate a reservoir, Xu et al [45,48] further developed a nonlinear dynamic coupling method for CFRD-reservoir systems based on the FEM-SBFEM approach. Fortunately, this method [45,50] is suitable for constructing polyhedral fluid elements and can be seamlessly integrated with a (octree) cross-scale dam analysis system based on polyhedron SBFEM.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Calculation Method of Hydrodynamic Pressure Based on Polyhedron SBFEM and Its Application in Nonlinear Cross-Scale CFRD-Reservoir Systems

Yan

et al. 2022

Water

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Hydrodynamic pressure is an important factor that cannot be ignored in the seismic safety evaluation of dams. However, when the polyhedron-scaled boundary finite element method is used to simulate dams in a cross-scale dynamic analysis, polygonal surfaces often appear on the upstream face of dams, which is difficult to deal with for conventional methods of hydrodynamic pressure. In this paper, a three-dimensional calculation method of hydrodynamic pressure based on the polyhedron-scaled boundary finite element method is proposed, in which polygon (triangle, quadrilateral, pentagon, hexagon, heptagon, octagon, etc.) semi-infinite prismatic fluid elements are constructed using the mean-value shape function. The proposed method, with a high efficiency, overcomes the limitation of conventional methods in which only quadrangle or triangle boundary faces of elements are permitted. The accuracy of the proposed method is proved to be high when considering various factors. Furthermore, combined with the polyhedron-scaled boundary finite element method for a solid dam, the proposed method for reservoir water is used to develop a nonlinear dynamic coupling method for cross-scale concrete-faced rockfill dam-reservoir systems based on the polyhedron SBFEM. The results of the numerical analysis show that when the hydrodynamic pressure is not considered, the error of rockfill dynamic acceleration and displacement could reach 15.4% and 12.7%, respectively, and the error of dynamic face slabs’ stresses could be 24.9%, which is not conducive to a reasonable seismic safety evaluation of dams.

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Design of Reservoir Performance Analysis System Based on Big Data Technology

Yongguang

2023

Lecture Notes in Electrical Engineering

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A nonlinear analysis of dynamic interactions of CFRD–compressible reservoir system based on FEM–SBFEM

Cited by 20 publications

References 41 publications

Dynamic Response of Deepwater Pile Foundation Bridge Piers under Current-wave and Earthquake Excitation

Dynamic Response of Deepwater Pile Foundation Bridge Piers under Current-wave and Earthquake Excitation

A Novel Calculation Method of Hydrodynamic Pressure Based on Polyhedron SBFEM and Its Application in Nonlinear Cross-Scale CFRD-Reservoir Systems

Design of Reservoir Performance Analysis System Based on Big Data Technology

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