The Performance Of Steel Reinforced Concrete Composite Structure Beam-column Joints

Joints are the key parts of connecting beams and columns, designing and calculating the joints is one of the most important part in designing and calculating the steel concrete composite structure. The internal forces of columns and beams is transmitted through the joints, so it is necessary to ensure the safety of the structures by ensuring the safety, joints force is so complex that it is usually in combined stress station of bending shearing and compressing, so it is very important to make sure the joints structure analysis, design reasonable, transfer clear, reliable computing by researching and analyzing the joints' mechanical properties and failure mechanism.This paper is based on the large project of Hefei train station, in different cases as for four joint's kinds (the reinforced concrete beams-steel reinforced concrete column joint, reinforced concrete beams-steel reinforced concrete column joint, steel beams-steel reinforced concrete joint and reinforced concrete beam column-steel beam-steel reinforced concrete column joint),takes advantage of the ABAQUS to do the series of nonlinear finite element analysis. adopted integrated finite element simplified model which isn't considered the bond-slip between the components.The different failure modes to four joint's kinds are obtained through analyzing the stress-strain cloud of concrete and steel. At the same time, different influences on node performance about different stiffened plate, beam web thickness, beam web height, concrete strength, axial compression ratio, shear span ratio are also obtained. It provides a maintenance logistics on the smooth implementation of SRC composition structures and a valuable directive function for similar projects in future.