Title: Behaviour of Circular Concrete-Filled FRP Tube Columns under Lateral Impact Loading: Numerical Study

Author(s): Maha Hussein Abdallah, Hamzeh Hajiloo, and Abass Braimah

Publication: Symposium Paper

Volume: 356

Issue:

Appears on pages(s): 312-326

Keywords: confinement; FRP tubes; impact loading; dynamic behaviour; pendulum machine, LS-DYNA

DOI: 10.14359/51737278

Date: 10/1/2022

Abstract:
Several studies have shown the superiority of concrete-filled FRP tubes (CFFTs) over conventional reinforced concrete columns. These observations indicated that CFFT columns exhibit much better static structural performance (in terms of ductility and load-carrying capacity). However, up to date, very few studies have considered the behavior of CFFT columns under dynamic impact loading. This paper presents a numerical study to investigate the impact resistance of columns strengthened with glass FRP tubes. LS-DYNA finite element software is used to investigate CFFT and RC columns subject to lateral impact loading induced by a 221 kg pendulum. The columns are 1800 mm with the fixed support at the base and 152 mm internal diameter. The models are designed to simulate the destructive effects of a vehicle collision into bridge piers. The impact forces and deformation states are analyzed. The impact behavior of CFFT columns is also compared with the conventional RC columns counterparts. The numerical results showed that the CFFT columns had higher dynamic impact load and less lateral deflection compared with the RC counterparts. The impact resistance of the CFFT columns was enhanced with an increase in the FRP tube thickness.