Comparative Study on Blast Damage Features of Reinforced Concrete Slabs with Polyurethane Sacrificial Cladding Based...

Area of Science:

• Materials Science
• Structural Engineering
• Computational Mechanics

Background:

• Sacrificial cladding is vital for blast resistance.
• Polyurethane's cellular structure and mechanical properties make it suitable for sacrificial cladding.
• Understanding blast mitigation effects on reinforced concrete slabs is crucial.

Purpose of the Study:

• To compare and select a suitable numerical simulation method for evaluating polyurethane sacrificial cladding's blast damage mitigation on reinforced concrete slabs.
• To investigate the damage features of reinforced concrete slabs with polyurethane sacrificial cladding (PU-RCS) under contact explosions.
• To validate numerical simulation results with field test data.

Main Methods:

• Development of three numerical models: Fully Coupled Eulerian-Lagrangian (CEL), Arbitrary Lagrangian-Eulerian (ALE) coupling, and Smoothed Particle Hydrodynamics and Finite Element Method (SPH-FEM) coupling.
• Simulation of contact explosions on reinforced concrete slabs with PU-RCS.
• Comparison of numerical results with a field test.

Main Results:

• The SPH-FEM coupling model accurately simulates damage features like concrete cracking and polyurethane deformation.
• CEL and ALE models effectively simulate shock wave propagation with lower computational costs.
• Field tests provided comparative data for numerical model validation.

Conclusions:

• The SPH-FEM coupling method is the most applicable for simulating blast damage features of PU-RCS.
• CEL and ALE models are suitable for shock wave propagation analysis.
• This study provides insights into selecting appropriate numerical methods for blast resistance research.