Numerical-aided design of fiber reinforced concrete tunnel segment joints subjected to seismic loads

Abstract

In this paper, the effects of different steel fiber reinforced concrete (SFRC) composites on the flexural response of segmental joints under seismic actions is investigated numerically based on experimental results. The results in terms of moment – rotation (M–θ) curves derived from an experimental test set-up, are used to calibrate and verify a finite element numerical model of the joint. From seismic analyses, the SFRC mixes show to enhance the seismic performance of the joint compared to plain concrete or traditional reinforced concrete. Finally, equations are proposed to estimate the joint’s moment demand/capacity ratio and rotational ductility for seismic design.