Experimental Analysis On Seismic Behavior Of Prefabricated Reinforced Concrete Column To Steel Beam Exterior Joints With Ribbed Angle Steel

Basic structural forms of reinforced concrete column-steel beam composite joints, such as beam-and column-through structures, are difficult to construct due to their complex structure. A joint connection construction method based on the ribbed angle steel was proposed in this study to improve construction performance of such joints, and the industrial assembly construction between reinforced concrete columns and steel beams was realized. By carrying out low cyclic loading test and numerical simulation of three full-scale specimens, the influence of beam–column section,the number of bolts between assembly connectors and steel beams on the performance of joints was examined by carrying out low cyclic loading test and numerical simulation of three full-scale specimens. Moreover, failure mode of joint was analyzed in detail and seismic performance indexes, such as bearing capacity, hysteretic performance, ductility, and energy dissipation capacity of joints, were compared. The results reveal that for different resistance matching among columns, beams, and connectors with ribbed angle steel, there are three failure modes of the joints, namely, shear failure in core area, slip at beam end, and slip at beam end with shear failure in core area. Seismic performance of joints varies with their failure modes. Hysteretic curve of shear failure joint in the core area shows evident pinch phenomenon. Ductility and equivalent viscous damping coefficients are 2.026 and 0.11, respectively. The seismic performance of the joint is consistent with that of the cast-in-place reinforced concrete beam–column joint. The hysteretic curve of the joint is full, ductility, and equivalent viscous damping coefficients reach 3.89 and 0.23, respectively, when slip exists between the connector and the steel beam. The joint demonstrates satisfactory seismic performance. This study provides an experimental basis for the engineering application of the novel prefabricated connection joint. © 2021 School of Science, IHU. All rights reserved.