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http://dx.doi.org/10.12989/cac.2018.21.6.669

Behaviour of recycled aggregate concrete beam-column connections in presence of PET fibers at the joint region  

Marthong, Comingstarful (Department of Civil Engineering, National Institute of Technology Meghalaya)
Publication Information
Computers and Concrete / v.21, no.6, 2018 , pp. 669-679 More about this Journal
Abstract
In this paper the behavior of reinforced concrete (RC) beam-column connections under cyclic loading was analyzed. The specimens, manufactured in a reduced-scale were made of (a) recycled aggregate concrete (RAC) by replacing 30% of natural coarse aggregate (NCA) with recycled coarse aggregate (RCA) and (b) RAC incorporating Polyethylene terephthalate (PET) fiber i.e., PET fiber-reinforced concrete (PFRC) at the joint region. PET fiber (aspect ratio=25) of 0.5% by weight of concrete used in the PFRC mix was obtained by hand cutting of post-consumer PET bottles. A reference specimen was also prepared using 100% of NCA and subjected to similar loading sequence. Comparing the results the structural behavior under cyclic loading of RAC specimens are quite similar to the reference specimens. Damage tolerance, load resisting capacity, stiffness degradation, ductility, and energy dissipation of the RAC specimens enhanced due to addition of PET fibers at the joint region. PFRC specimens also presented a lower damage indices and higher principal tensile stresses as compared to the RAC specimens. The results obtained gave experimental evidence on the feasibility of RAC for structural use. Using PET fibers as a discrete reinforcement is recommended for improving the seismic performance of RAC specimens.
Keywords
beam-column connections; recycled aggregate concrete; mechanical properties; polyethylene terephthalate fiber; cyclic loading; seismic performance;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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