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Numerical modelling of reinforced concrete using lattice particle method with extension to FSI-induced structural failure via SPH coupling
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DOI：10.1016/j.compstruc.2025.108075.png)
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Abstract
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In this paper, a fluid structure interaction (FSI) solver based on smoothed particle hydrodynamics (SPH) and lattice particle method (LPM) is further developed to model FSI phenomena with structural failure involving concrete and reinforced concrete (RC). First, the development of the LPM structural solver to model reinforced concrete is presented. An explicit return-mapping algorithm is proposed in the framework of LPM to model the failure of reinforced concrete structures. The predictive capability and generality of the proposed LPM model is assessed against experimental results covering wide range of failure modes seen in RC beams. Key features of the flexural and shear failure in RC beams are captured by the model. With particle size refinement, the structural response and crack pattern show consistent results. Upon verification of the structural solver, the coupled SPH-LPM method is applied to simulate several FSI test cases with solid fracture. Finally, the capability of the current method in tackling complex, real-world FSI cases with structural failure is demonstrated through the test case of failure of plain and reinforced concrete wall due to tsunami-type wave.
Keywords:
Lattice particle method
Volume compensated particle method
Smoothed particle hydrodynamics
Reinforced concrete
Shear failure
Fluid structure interaction
Fracture analysis
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