Abstract
Reinforced concrete (RC) square columns are vulnerable to sudden dynamic impact loadings such as vehicle impact to bridge column or air blast shock due to blast effects. In this experimental study, RC square columns strengthened with CFRP strip subjected to sudden low-velocity lateral impact loading were investigated. A free falling weight test setup was used to apply the impact loading to RC square columns. The test specimens were manufactured with square cross sections with one-third geometric scale. In scope of the study, four test specimens were manufactured and tested. The main variables considered in the study were the application point of impact loading and CFRP strip spacing. A 9.0 kg mass was allowed to free fall from a height of 1.0 m to apply the impact loading on the columns. During the impact tests, acceleration, impact force, column midpoint displacement, and CFRP strip strains measurements were taken. The general behavior of test specimens, collapse mechanisms, acceleration, displacement, impact load, and strain–time relationships were interpreted and the load–displacement relationships were obtained. The data from the experimental study was used to investigate the effect of variables on the impact performances of RC columns.
Published Version
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