Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Damage Tolerance Capacity of Exterior Beam-Column Joint with High-Performance Fiber Reinforced Cementitious Composite
The shear resistance behavior of beam-column joint decides the ductile performance of the reinforced concrete (RC) framed structure. The brittle nature of concrete fails to resist the alternate diagonal compression and tension at the joint region and leads to shear failure. The use of closely spaced stirrups at the plastic hinge region of the joints leads to construction difficulty and works up to a certain extent in providing ductility. The use of discontinuous steel fiber in concrete (SFRC) is one of a kind to improve the joint shear resistance. But the higher volume of steel fiber leads to fiber balling and workability issues which restricts the efficiency of SFRC in joint shear resistance. The absence of coarse aggregate and presence of fine mineral admixtures in high performance fiber reinforced cementitious composites (HPFRCC) overcome the issues with SFRC and enhances the ductility and damage tolerance of joint. In this study the HPFRCC is used at the joint region without critical detailing and tested under reverse cyclic loading. The presence of 1% synthetic fiber and better fiber dispersion improves the crack bridging ability of HPFRCC and allows dense micro cracks formation at the hinge region. The hysteresis curve shows improved shear strength and the post failure analysis shows that the formation of multiple micro cracks enhances the displacement ductility. The use of HPFRCC in the joint region eliminates the need of seismic detailing without compromising the shear resistance and eases the construction activity with improved ductility.
Damage Tolerance Capacity of Exterior Beam-Column Joint with High-Performance Fiber Reinforced Cementitious Composite
The shear resistance behavior of beam-column joint decides the ductile performance of the reinforced concrete (RC) framed structure. The brittle nature of concrete fails to resist the alternate diagonal compression and tension at the joint region and leads to shear failure. The use of closely spaced stirrups at the plastic hinge region of the joints leads to construction difficulty and works up to a certain extent in providing ductility. The use of discontinuous steel fiber in concrete (SFRC) is one of a kind to improve the joint shear resistance. But the higher volume of steel fiber leads to fiber balling and workability issues which restricts the efficiency of SFRC in joint shear resistance. The absence of coarse aggregate and presence of fine mineral admixtures in high performance fiber reinforced cementitious composites (HPFRCC) overcome the issues with SFRC and enhances the ductility and damage tolerance of joint. In this study the HPFRCC is used at the joint region without critical detailing and tested under reverse cyclic loading. The presence of 1% synthetic fiber and better fiber dispersion improves the crack bridging ability of HPFRCC and allows dense micro cracks formation at the hinge region. The hysteresis curve shows improved shear strength and the post failure analysis shows that the formation of multiple micro cracks enhances the displacement ductility. The use of HPFRCC in the joint region eliminates the need of seismic detailing without compromising the shear resistance and eases the construction activity with improved ductility.
Damage Tolerance Capacity of Exterior Beam-Column Joint with High-Performance Fiber Reinforced Cementitious Composite
Structural Integrity
Fonseca de Oliveira Correia, José António (Herausgeber:in) / Choudhury, Satyabrata (Herausgeber:in) / Dutta, Subhrajit (Herausgeber:in) / Jadhav, Nikhil R. (Autor:in) / Chidambaram, R. Siva (Autor:in)
International Conference on Advances in Structural Mechanics and Applications ; 2021 ; Silchar, India
Advances in Structural Mechanics and Applications ; Kapitel: 10 ; 125-138
Structural Integrity ; 26
15.07.2022
14 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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