Assessments and preventions of the damages and their modes in the second and third spans of the RC highway straight girder bridge under surface blast using the FEM-SPH coupling
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引用次数: 0
Abstract
The blast threats have become a global safety concern for the ecosystems. Rigorous research using blasts over infrastructures improves the assessment methods, damages and failure modes, either experimentally or numerically. However, experimental blast analysis over a full-scale bridge is not feasible and is against the country's federal law. Alternatively, numerical analysis with experimentally validated parameters of prototype or scale models is better. Eventually, a bridge is one of the significant infrastructures that connect two conflict or geographically cut-off points for vehicle movements. Therefore, single or multispan full-scale bridge's impact analysis under blast is vital. Further, the literature address that coupled finite element method (FEM) - smoothed particle hydrodynamics (SPH) method yield better results at blast temperatures, and damage in the same span of the blast is primarily unrecoverable. Therefore, the current numerical investigation explores the assessments and preventions of the damage and their failure modes in the second and third spans, taking 16 numbers RC straight highway girder-bridge models under surface blast using FEM-SPH coupling with reflected air boundary and 5 mm thick non-Explosive Reactive Armour (nERA) as a protective material over entire bridge surface. The damage assessments of the bridge have been explored using blastwave propagation, interaction, effective plastic strain, particle-damaged contours, mass loss, and failure modes. Finally, the study recommends the application of blast-resistant barriers to provide safety and prevent the blast's primary and/or secondary effects.
期刊介绍:
This journal is specifically dedicated to the dissemination of the latest developments of new engineering analysis techniques using boundary elements and other mesh reduction methods.
Boundary element (BEM) and mesh reduction methods (MRM) are very active areas of research with the techniques being applied to solve increasingly complex problems. The journal stresses the importance of these applications as well as their computational aspects, reliability and robustness.
The main criteria for publication will be the originality of the work being reported, its potential usefulness and applications of the methods to new fields.
In addition to regular issues, the journal publishes a series of special issues dealing with specific areas of current research.
The journal has, for many years, provided a channel of communication between academics and industrial researchers working in mesh reduction methods
Fields Covered:
• Boundary Element Methods (BEM)
• Mesh Reduction Methods (MRM)
• Meshless Methods
• Integral Equations
• Applications of BEM/MRM in Engineering
• Numerical Methods related to BEM/MRM
• Computational Techniques
• Combination of Different Methods
• Advanced Formulations.