Damage assessment of reinforced concrete columns retrofitted by steel jacket under blast loading

Abstract

SummaryIn this study, the damage to a reinforced concrete column retrofitted by steel jacket subjected to blast loading was investigated. Actually, this research is an extensive study of the previous works of the authors. Therefore, some of finite element modeling and validation procedure were adopted. Extensively, the effect of the steel jacket used for retrofitting the reinforced concrete column was evaluated. The effects of scaled distance, axial compressive force, and steel cover plate thickness on the structural performance of the column were investigated and discussed. Moreover, the residual strengths of the column with respect to the different scaled distances were also evaluated. Some useful discussions and recommendations, which may interest structural engineers and researchers, were presented as an important outcome of this research.

Blast Loaded Columns—State of the Art Review

“…Column damage is shown in Figure 23. Thai et al [70] modeled in LS-Dyna RC steel jacked columns (25 cm × 25 cm × 360 cm) and observed the influence of steel thickness, scaled distance, and longitudinal compressive force on the behavior of the columns under the blast load. The columns are designed according to Eurocode 2.…”

Numerical study on effect of constant and variable axial loads on RC column subjected to blast load

“…[ 5 , 6 , 7 , 8 ] have performed analytical studies by using a SDOF and MDOF structural dynamic analysis to study the response of reinforced concrete columns under blast loads. In addition to this a numerical assessment on RC columns prone to blast loads are also evaluated by [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. [ 9 , 10 ] evaluated the damage propagation of RC column strengthened by steel jacketing and also predicted the residual strength of a FRP retrofitted RC column subjected to blast loading.…”

“…In addition to this a numerical assessment on RC columns prone to blast loads are also evaluated by [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. [ 9 , 10 ] evaluated the damage propagation of RC column strengthened by steel jacketing and also predicted the residual strength of a FRP retrofitted RC column subjected to blast loading. Thai et al.…”

“…Likewise Thai et al. [ 10 ] also considered different compressive axial load ratios and investigated the damage modes of RC column. A compressive axial load ratio of 0.0–0.8 f c ′A g were considered and the results showed that as the scaled distance drops, the effect of increasing an axial load made the column in severe damage.…”

Structural Response of Steel Jacket-UHPC Retrofitted Reinforced Concrete Columns under Blast Loading

“…Thai et al [ 14 ], used a commercial FE analysis code to study the behavior of 250 × 250 × 3600 mm rectangular concrete columns retrofitted with a steel jacket under blast loading having scale distances from 0.10 to 0.40 m/kg 1/3 . The effects of the axial force and the steel thickness on the blast performance of the specimens were investigated.…”