CFRP strengthened CFST columns under vehicular impact

Abstract

Concrete filled steel tubular (CFST) columns are increasingly used in bridge piers and high-rise buildings due to their excellent axial load bearing capacity. These columns may experience severe damage or failure due to transverse impact of vehicle collisions. In this study, numerical investigation is carried out to evaluate the effect of carbon fibre reinforced polymer (CFRP) strengthening CFST columns under vehicular impact. The CFRP composites damage mechanisms are simulated to account four different failure criteria. The cohesive elements are introduced as interface element to properly simulate the adhesively bonded regime. Simplified vehicle model is also developed to represent real vehicle behaviour. The FE analysis results show that externally bonded CFRP composites improve the impact resistance capacity compared to bare CFST column.

Transverse Impact on Hollow and Concrete Filled Steel Tubular Members

“…Alam et al, [13] indicated that strengthening concrete by (CFRP) sheets improved its impact resistance. Wherefore this study suggested utilizing this technique to avoid collapse of (CFST) column subjected to vehicular impact in bridges.…”

“…They also explained that (RACFST) specimens had better deformationresistance capability as normal (CFST) specimens. Alam et al, [13] performed Finite element investigation on Carbon Fiber Reinforced Polymer (CFRP) strengthening (CFST) column under transverse impact loading. They indicated that strengthening concrete by (CFRP) sheets improved its impact resistance.…”

Literature Review: Concrete Filled Steel Tubes Under Transverse Impact Loading

“…Also, Alam et al [120] studied CFRP strengthened CFST columns under vehicular impact. Nevertheless, Aslani et al [121] predicted the axial load capacity of high-strength concrete filled steel tubular columns. Additionally, Ganesh Prabhu et al [122] investigated the compressive behavior of circular CFST columns externally reinforced using CFRP composites.…”