Experimental and numerical study on damage mode of RC slabs under combined blast and fragment loading

Li, Ying; Chen, Zhaoyue; Ren, Xianben; Tao, Ran; Gao, Ruxin; Fang, Daining

doi:10.1016/j.ijimpeng.2020.103579

Cited by 37 publications

(16 citation statements)

References 25 publications

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“…Simultaneously, the coordinate and velocity of particles are transferred to FEM nodes. While particles supply boundary conditions for FEM, FEM maintains the continuity of the particles by preventing the boundary effect [35]. In this study regarding fluid-structure interaction, velocity and displacement fields on the solid-fluid interface are exchanged in order to couple the interaction forces between SPH and FEM.…”

Section: Coupled Sph-femmentioning

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: Coupled Sph-femmentioning

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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“…Velocity and displacement are transferred between SPH particles and FEM nodes in each time step. SPH particles provide boundary conditions for FEM, and FEM prevents the boundary effect by maintaining the continuity of the particles [23]. In this fluid-structure interaction study, the interactive forces between SPH and FEM are coupled by exchanging velocity and displacement fields on the solid-fluid interface.…”

Section: Coupled Smoothed Particle Hydrodynamics-finite Element Metho...mentioning

confidence: 99%

Seismic Analysis of a Large LNG Tank Considering Different Site Conditions

Zhao

Zhang

et al. 2020

Applied Sciences

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Seismic resilience of critical infrastructure, such as liquefied natural gas (LNG) storage tanks, is essential to the safety and economic well-being of the general public. This paper studies the effect of different ground motions on large LNG storage tanks under four different site conditions. Key parameters of structural design and dynamic analysis, including von Mises stress of outer and inner tanks, tip displacement, and base shear, are analyzed to directly evaluate the safety performance of the large LNG tanks. Because the size of an LNG tank is too large to perform any experiments on a physical prototype, Smoothed Particle Hydrodynamics-Finite Element Method (SPH-FEM) simulation is used as a feasible and efficient method to predict its seismic response. First, the accuracy of the SPH-FEM method is verified by comparing sloshing frequencies obtained from theoretical formulation to experimental results and SPH-FEM models. Then, the seismic response of a real-life 160,000 m3 LNG prestressed storage tank is evaluated with different liquid depths under four site classes. Simulation results show that the tip displacements of the LNG tank at liquid levels of 25% and 50% under site class IV are nearly identical to that of 75% and 100% under site class II. In addition, the maximum von Mises stress of the inner tanks exceeds 500 MPa in all four site classes and jeopardizes the structural integrity of large LNG tanks. As a result, optimization of structural design and the establishment of an early warning system are imperative to the safety of LNG tanks at high liquid levels.

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“…Kumar [13] designed a free-fall steel impactor test to investigate the impact force, acceleration, and deflection response of the prestressed and reinforced concrete slabs under impact loading. Li [14] conducted an explosion test to study the combined loading effect and failure characteristics of bidirectional RC slabs. Yao [15] analyzed the blast resistance and damage characteristics of reinforced concrete slabs with different reinforcement ratios by explosion experiments with 0.13 kg and 0.19 kg of TNT.…”

Section: Introductionmentioning

confidence: 99%

Experiment and Simulation Study on the Dynamic Response of RC Slab under Impact Loading

Wang

Liu

Xiao

et al. 2021

Shock and Vibration

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Reinforced concrete (RC) slab is an important component in civil construction and protection engineering, and its dynamic response under impact loading is a complex mechanical problem, especially for two or multiple continuous impact loads. In this paper, a series of drop hammer impact tests were carried out to investigate the dynamic response of RC slabs with two successive impacts. The time history of impact force and the failure characteristic of the slab surface were recorded. Moreover, four influence factors, including slab thickness, reinforcement ratio, impact location, and drop hammer height have been discussed. Besides, a 3D numerical model based on the finite element method (FEM) was established to expand the research of constrained force, deflection, and vertical stress of an RC slab. The results show that increasing the slab thickness and reinforcement ratio can improve the impact resistance of an RC slab. The impact point location and drop hammer height have a great influence on the dynamic response of the RC slab. In addition, the RC slab will have more obvious damage under the second impact, but the dynamic response becomes weaker. It may be because of the local damage in the concrete caused by the first impact that would weaken the propagation of vibration.

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Experimental and numerical study on damage mode of RC slabs under combined blast and fragment loading

Cited by 37 publications

References 25 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 Analysis of a Large LNG Tank Considering Different Site Conditions

Experiment and Simulation Study on the Dynamic Response of RC Slab under Impact Loading

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