Structural Engineering and Mechanics

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Seismic behavior of steel and sisal fiber reinforced beam-column joint under cyclic loading

  • S.M. Kavitha (Department of Civil Engineering, Alagappa Chettiar Government College of Engineering &Technology) ;
  • G. Venkatesan (Department of Civil Engineering, University College of Engineering Tiruchirapalli (BIT Campus), Anna University) ;
  • Siva Avudaiappan (Departamento de Ciencias de la Construccion, Facultad de Ciencias de la Construccion y Ordenamiento Territorial, Universidad Tecnologica Metropolitana) ;
  • Chunwei Zhang (Multidisciplinary Center for Infrastructure Engineering, Shenyang University of Technology)
  • Received : 2022.12.12
  • Accepted : 2023.11.07
  • Published : 2023.12.10
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Abstract

The past earthquakes revealed the importance of the design of moment-resisting reinforced concrete framed structures with ductile behavior. Due to seismic activity, failures in framed structures are widespread in beam-column joints. Hence, the joints must be designed to possess sufficient strength and stiffness. This paper investigates the effects of fibers on the ductility of hybrid fiber reinforced self-compacting concrete (HFRSCC) when subjected to seismic actions; overcoming bottlenecks at the beam-column joints has been studied by adding low modulus sisal fiber and high modulus steel fiber. For this, the optimized dose of hooked end steel fiber content (1.5%) was kept constant, and the sisal fiber content was varied at the rate of 0.1%, up to 0.3%. The seismic performance parameters, such as load-displacement behavior, ductility, energy absorption capacity, stiffness degradation, and energy dissipation capacity, were studied. The ductility factor and the cumulative energy dissipation capacity of the hybrid fiber (steel fiber, 1.5% and sisal fiber, 0.2%) added beam-column joint specimen is 100% and 121% greater than the control specimen, respectively. And also the stiffness of the hybrid fiber reinforced specimen is 100% higher than the control specimen. Thus, the test results showed that adding hybrid fibers instead of mono fibers could significantly enhance the seismic performance parameters. Therefore, the hybrid fiber reinforced concrete with 1.5% steel and 0.2% sisal fiber can be effectively used to design structures in seismic-prone areas.

Keywords

References

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