|Title:||Residual axial compression capacity of localized blast-damaged RC columns||Authors:||Wu, Ke-Chiang
|Keywords:||LS-DYNA; Near-field explosive test; RC column; Residual axial capacity||Issue Date:||2011||Journal Volume:||38||Journal Issue:||1||Start page/Pages:||29-40||Source:||International Journal of Impact Engineering||Abstract:||
The risks associated with suitcase bombs are of serious concern because they can be easily handled and placed within close proximity of key structural components of building structures. The most common failure mode of the structures subjected to blast loads from satchel and suitcase bombs is progressive collapse. High-fidelity physics based computer program, LS-DYNA is utilized in this study to provide numerical simulations of the dynamic response and residual axial capacity of reinforced concrete (RC) columns subjected to blast loads. Field tests using near-field explosive charge were conducted on two RC column specimens. The test results were compared with the analytical results to validate the finite element model. An extensive parametric study was conducted to investigate the relationship between residual axial capacity and structural and loading parameters such as material strength, column detail and blast conditions. Two empirical equations were derived through a multivariable regression analysis in terms of the various parameters to predict the residual capacity index based on a non-dimensional column dimension parameter (ωTNT). According to the proposed equations, the residual capacity index can be determined and compared with a service axial load index. © 2010 Elsevier Ltd. All rights reserved.
|ISSN:||0734743X||DOI:||10.1016/j.ijimpeng.2010.09.002||SDG/Keyword:||Analytical results; Axial capacity; Blast conditions; Blast loads; Building structure; Close proximity; Column dimensions; Compression capacity; Computer program; Empirical equations; Explosive charges; Field test; Finite element models; High fidelity; Loading parameters; LS-DYNA; Material strength; Multivariable regression analysis; Near-field; Numerical simulation; Parametric study; Physics-based; Progressive collapse; RC column; Reinforced concrete column; Residual capacity; Structural component; Test results; Aerodynamic loads; Bombs (ordnance); Computer simulation; Dynamic response; Finite element method; Regression analysis; Reinforced concrete; Secondary batteries; Structural dynamics; Explosives|
|Appears in Collections:||土木工程學系|
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