Spalling in concrete subjected to shock wave blast
Journal article, 2016

This paper studies the response in a concrete wall subjected to shock wave blast, leading to spalling failure. This situation is important since spalled-off fragments in protective structures may cause severe injury to the persons or equipment it is supposed to protect. Many theoretical expressions indicates that spalling occurs when and where the tensile strength of a strain-softening material like concrete is reached regardless of the time duration of the applied load. By using a simple uni-axial numerical model, this study shows that spalling instead might occurs when the cyclic response from a blast wave gradually increase the inelastic strains in the concrete. This means that spalling takes place after several loading cycles and not necessarily at the depth where tensile strength is firstly reached. Furthermore, the study shows that the cyclic response in the material model used for numerical simulation has a decisive influence on the position and extent of the resulting spalling crack.

Cyclic crack propagation

Stain-softening

Wave propagation

Cyclic response

Transverse/reverse loading

Concrete

Spalling

Dynamic response

Author

Jonas Ekström

Chalmers, Civil and Environmental Engineering, Structural Engineering

Rasmus Rempling

Chalmers, Civil and Environmental Engineering, Structural Engineering

Mario Plos

Chalmers, Civil and Environmental Engineering, Structural Engineering

Engineering Structures

0141-0296 (ISSN) 1873-7323 (eISSN)

Vol. 122 72-82

Areas of Advance

Building Futures (2010-2018)

Subject Categories

Civil Engineering

DOI

10.1016/j.engstruct.2016.05.002

More information

Created

10/7/2017