One
of the most cost-effective applications of fiber reinforced polymers (FRPs) is
in hybrid construction with
concrete, where FRP provides the pour form,
protective jacket, and shear and flexural reinforcement for
concrete. Seismic
performance of concrete-filled FRP tubes (CFFT) is the subject of this study.
While previous studies have shown the feasibility of the proposed system both
at the member level and at the connection level, especially under reverse
cyclic loading, this study focuses on the following issues that have not been
addressed before: (a) effect of the type of fibers and hybrid lay-up of the
tube on the performance of the system, (b) effect of combined shear and moment,
especially for shorter columns, (c) lateral performance of two-column bent
systems, and (d) holistic performance of the entire bridge structure on shake
tables. This paper reports on an on-going project to design the next generation
of seismic-resistant bridge substructure, as part of a multi-university
project, which is funded by the NSF-Network of Earthquake Engineering
Simulation Research (NEESR) program.