Behavior of hollow-core fiber reinforced polymer-concrete-steel bridge columns under extreme loading

"This study introduces an investigation of the behavior of innovative, resilient, and quickly-constructed hollow-core fiber reinforced polymer-concrete-steel (HC-FCS) bridge columns under extreme loading. The HC-FCS column consists of a concrete wall sandwiched between an outer fiber reinforced polymer (FRP) tube and an inner steel tube. The steel tube was embedded into a reinforced concrete footing with an embedded length of 1.6-1.8 times the diameter of the steel tube. The FRP tube only confined the concrete wall and truncated at the top of the footing level. The hollow steel tube was the only reinforcement for shear and flexure inside the HC-FCS column. The steel and FRP tubes act together as stay-in-place formworks. The results obtained from testing the HCFCS columns under seismic loading have been compared with those from testing the conventional reinforced concrete (RC) column. Results showed that the HC-FCS column exhibited a high lateral drift reaching 15.2%, while the well-detailed solid cross-section RC column reached a drift of 10.9%. The HC-FCS column dissipated energy reaching 1.9 times that of the RC column. A simple analytical model and preliminary design guidelines were presented to help implement this new technology. Vehicle collision with RC and HC-FCS bridge columns was also presented in this study using LS-DYNA software. The first equation for estimating the equivalent static force of the vehicle collision, based on the vehicle's mass and velocity, was developed. This approach will allow departments of transportation (DOTs) to design different bridge columns for different impact force demands depending on the anticipated truck loads and velocities from roads survey. In general, the peak dynamic force values of the HC-FCS columns were lower than those of the RC columns when they were subjected to vehicle collision, which could save lives and reduce damage to the bridge column and the vehicle"--Abstract, page v.

Name thesis:degree_name

Ph. D. in Civil Engineering

Grantor

Missouri University of Science and Technology

Author dc:creator

• Abdelkarim, Omar I.

• Accelerated bridge construction
• Composite columns
• Hollow-core columns
• LS-DYNA
• Seismic loading
• Vehicle collision
• Civil Engineering

Repository record dc:identifier

https://scholarsmine.mst.edu/doctoral_dissertations/2610

OAI identifier oai:identifier

oai:scholarsmine.mst.edu:doctoral_dissertations-3615