Seismic Behaviour of Hybrid Fibre Reinforced Concrete Bare Frames

摘要

Fibers have been used to reinforce materials that are weaker in tension than in compression. Hybrid fiber reinforced concrete (HFRC) is the one in which more than one or two types of fibers are used as secondary reinforcement. By providing fibres in the critical zones, i.e., joints of the frames, it is possible to improve the performance of the frames against lateral loading. Hence an attempt is made to determine the behaviour of the hybrid fiber reinforced concrete bare frames against lateral cyclic loading. The fibers used here are polyolefin and steel fibers. Various tests were done on concrete cubes, cylinders and prisms with different dosage of fibers to determine the mechanical properties of HFRC and the test results are compared with control specimens. The hybrid fibres were used in the joints of the frame specimen. The percentage of fibers used is 0.75%, 1.5% & 2%. The cyclic load behavior of hybrid fiber reinforced concrete bare frames was experimentally investigated. The ultimate strength, Deflection, ductility factor and energy dissipation of HFRC bare frames with varying percentage hybrid fibres were compared with control bare frame specimen.