Zum Tragverhalten von Rahmenknoten mit Stahlfaserbeton unter seismischer Belastung

Behaviour of FRC beam column joints under seismic loading

The present paper discusses the behaviour of fibre reinforced concrete (FRC) beam column joints under cyclic loading carried out as an Indian-German collaborative research project. To avoid reinforcement congestion in the joint region without compromising performance, FRC is found to be extremely potential. Addition of steel fibres would lead to improved strength, energy dissipation capacity and integrity inside the joint. Moreover an alternate reinforcement detailing has been developed to move the plastic hinge in the beam region. First, the positive effects of using FRC are discussed followed by the experimental studies. Strength of beam column joints using FRC was experimentally evaluated to ensure that they are strong enough to produce a failure in the beam at a predetermined distance away from the column face. The test results showed the beneficial effect of FRC on energy dissipation and joint integrity. Further, the results obtained from both numerical and analytical studies in terms of strength and failure mechanism are in good aggreement with those obtained from the experimental studies. The paper concludes with recommendations to design the beam column joint and to shift the plastic hinge in the beam region.