Experimental Research On Regional Confined Concrete Beams Under Shear Load

Regional Confined Concrete (RCC) is a newly developed structure based on the research of normal confined concrete (NCC). The confined area acted an independence small element form with work. The RCC promotes the load-carrying capacity and ductility of concrete elements efficiently by confining the concrete with longitudinal bars and stirrups where are needed.Compared with NCC, RCC has its own mechanical property and different failure mode due to the change of confining configuration.The anti-seismic capacity and safety margin can be improved if the RCC is applied to structures. The RCC reduces the section of elements efficiently therefore the clear space of house can be increased and the material and energy saved.Three beams with un-integral supports subjected to shear forces are tested in the research project including' one NCC beam and two RCC beams. Analyses are conducted focusing on the resisting shear capacity, forming of cracks, failure modes, longitudinal bars and stirrups work behaviors. Results shown that the RCC improved the resisting shear capacity and delayed the failure.