Improving the behavior Reinforced Concrete frames made of UHPC using the metallic vertical shear link

Abstract. This paper investigates the behaviour reinforced concrete frames of
the Ultra High Performance Concert (UHPC) using the metallic vertical shear
link. The behavior of the UHPC is analyzed such as the case of ultimate strength,
its stiffness and dissipating energy. A metallic vertical eccentrically braced frame
(VEBF) shear link with a shear mechanism is explored in the UHPC. Accordingly,
improving the behavior of the RC frame with double VEBF is investigated.
The proposed system is not easy fabrication and good seismic performance. But
it can be easily replaced after a severe earthquake. Since the VEBF does not carry
the gravity loads, its replacement does not affect the severability of the building
during the repair. The finite element models are applied to investigate the behavior
of moment resisting frame made of UHBC and conventional concrete
strengthened with metal vertical shear link. The accuracy of the prosed results is
compared with the reported experimental test. The numerical results indicated
that adding the VEBF to the RC frame improved the behavior of the RC frame in
elastic and inelastic zones. It enhanced the ultimate strength, stiffness, and energy
absorption of the RC moment-resisting frame. Also, it prevents hinge formation
over the main column.
Keywords: UHPC; Frame; Ultimate strength; Stiffness.

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