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http://dx.doi.org/10.12989/eas.2018.14.3.261

Seismic behavior of fiber reinforced cementitious composites coupling beams with conventional reinforcement  

Liang, Xingwen (School of Civil Engineering, Xi'an University of Architecture and Technology)
Xing, Pengtao (School of Civil Engineering, Xi'an University of Architecture and Technology)
Publication Information
Earthquakes and Structures / v.14, no.3, 2018 , pp. 261-271 More about this Journal
Abstract
Fiber reinforced cementitious composites (FRCC) materials that exhibit strain-hardening and multiple cracking properties under tension were recently developed as innovative building materials for construction. This study aims at exploring the use of FRCC on the seismic performance of coupling beams with conventional reinforcement. Experimental tests were conducted on seven FRCC precast coupling beams with small span-to-depth ratios and one ordinary concrete coupling beam for comparison. The crack and failure modes of the specimens under the low cycle reversed loading were observed, and the hysteretic characteristics, deformation capacity, energy dissipation capacity and stiffness degradation were also investigated. The results show that the FRCC coupling beams have good ductility and energy dissipation capacities compared with the ordinary concrete coupling beam. As the confinement stirrups and span-to-depth ratio increase, the deformation capacity and energy dissipation capacity of coupling beams can be improved significantly. Finally, based on the experimental analysis and shear mechanism, a formula for the shear capacity of the coupling beams with small span-to-depth ratios was also presented, and the calculated results agreed well with the experimental results.
Keywords
fiber reinforced cementitious composites; coupling beam; span-to-depth ratio; quasi-static test; conventional reinforcement; shear capacity;
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