Shear strength of annealed wire fiber reinforced concrete coupling beam under cyclic loads

Abstract

Abstract The design and construction of the coupling beams remain challenging due to the presence of large reversed-cyclic nonlinear rotation demands combined with large shear forces. One way to increase the shear strength of a coupling beam is to use fiber. The purpose of this research is to determine the shear strength for coupling beam using annealed wire fiber. Two coupling beam test specimens measuring 20 cm x 40 cm with a length of 115 cm with a ratio of L n / h is 2.875 with the details of 1 coupling beam without fiber (CB-1) and 1 coupling beam with fiber (CBF-1). Annealed wire fiber used in research with diameter (D) 0.8 mm with fiber length (L) 48 mm (L / D ratio is 60) with fiber composition 0.75% of volume. The results show the Shear strength of coupling beam using fiber increases by 58% from normal concrete shear strength. Also, the shear strength of the coupling beam in SNI 2847:2013 is 0.67 and 0.42 of the experimental shear strength of normal CB and annealed wire fiber CB so that the design of the coupling beam based on SNI 2847:2013 can be used as a reference in planning earthquake resistant building structures.

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