I have to create a FEM model of an RC bridge pier retrofitted with FRP.
I used Concrete07 for all bridge piers and developed fragility curves of the not retrofitted bridge. Now, I want to retrofit bridge piers with FRP and develop fragility curves for the retrofitted system.
Which material is better to model FRP? ConfinedConcrete01 or FRPConfinedConcrete?
Is it better to be seen the effect of FRP confinement on the concrete core and concrete cover in formulations that were proposed by Mander for Concrete07? or is it better to use from those two materials that I mentioned before?
Ahmed M. Ismail, Mohamed F.M. Fahmy, Zhishen Wu,
Simulating the lateral performance of FRP-confined RC circular columns using a new eccentric-based stress-strain model,
(https://www.sciencedirect.com/science/a ... 2316330306)
Abstract: In this study, a stress-strain model of fiber-reinforced polymers (FRPs)-confined concrete based on the lateral confinement stiffness was adopted to simulate the lateral response of RC columns retrofitted with external FRP jackets and tested under axial and lateral loads. The adopted model and other five-stress-strain models (established in former studies) were comparatively studied to simulate the seismic response of eight RC-circular columns retrofitted with FRP jackets and experimentally tested under both axial and lateral loads. Compared to the experimental results, the simulation results indicated that all stress-strain models could not identify properly the ultimate lateral displacements of the simulated columns. The adopted stress-strain model was revised to consider the effect of a key influential parameter (eccentricity ratio), which showed a critical impact on the simulation of the seismic response of RC-columns under combined bending and axial loadings. Finally, the proposed model was evaluated in predicting the lateral response of additional three columns and the simulation results exhibited a good agreement with the experimental results.
Keywords: Eccentricity; Design-oriented model; Lateral loading; Circular column; FRP-jacket; OpenSees
https://bigeconomy.gr/wp-content/upload ... ournal.pdf