Performance of axially loaded square RC columns with single/double confinement layer(s) and strengthened with C-FRP wrapping under close-in blast

Blast performance prediction of circular column with improvised equivalent helical mesh transverse reinforcement substituted for single helix, UHPFRC plaster and CFRP wrapping under close-in blast

“…Owing to high uncertainties in load prediction under different explosion (blast, impact, terrorist attack etc. ), performance prediction of structure due to these triggering events is a challenging task [10][11][12][13][14]. In general, structures are not designed to resist such explosion-induced loadings and when a load-bearing component of a structure is exposed to such catastrophic explosive event, the process of failure is initiated with damage to the component [15][16][17].…”

“…For the reliable blast-resistant design and analysis of RC structure, it is of signi cant importance to comprehensively understand the mechanism involved in blast loading characteristic, blast wave propagation/interaction with the surrounding, and structural response/damages [20]. The current design approach practice available in standards/manuals are based on the assumption of single-degree-of-freedom (SDOF), where blast loading acting on the structural component is assumed to be simultaneous and uniform [10]. However, such assumption deemed not t suitable for the prediction of structural response/damage subjected to close-in/near-eld blast loading where loading is non-simultaneous and non-uniform [10,12,22].…”

“…The current design approach practice available in standards/manuals are based on the assumption of single-degree-of-freedom (SDOF), where blast loading acting on the structural component is assumed to be simultaneous and uniform [10]. However, such assumption deemed not t suitable for the prediction of structural response/damage subjected to close-in/near-eld blast loading where loading is non-simultaneous and non-uniform [10,12,22]. Blast eld and laboratory test are needed to reliably demonstrate the actual response of the structure and it also validate the delity of computational methods [10,12].…”

“…However, such assumption deemed not t suitable for the prediction of structural response/damage subjected to close-in/near-eld blast loading where loading is non-simultaneous and non-uniform [10,12,22]. Blast eld and laboratory test are needed to reliably demonstrate the actual response of the structure and it also validate the delity of computational methods [10,12]. The lack of experimental research in the area of blast loading due to high cost of live explosion testing, heavy equipment and machinery rental and transportation cost to transfer them to the test site, and the hazard associated with blast are some of the constraints in the evaluation of blast resisting capacity of a structure [10,12,18].…”

“…[18,21]. Such constraints have reduced the number of explosions testing to be carried out [10,12,18].…”