Experimental Research on Mechanical Properties of Pre-embedded Steel Pipe Reinforced Concrete Column-steel Beam Prefabricated Joint
In order to research the influence of axial compression ratio and pre-embedded steel pipes on the mechanical properties of reinforced concrete column-steel beam(RCS)prefabricated joint with end plate and bolt connection,a new design for a reinforced concrete column-steel beam assembled joint is introduced,which involves the use of pre-embedded steel pipes instead of conventional PVC pipes for reserving high-strength bolt holes.Static loading tests were conducted on the beam ends of six specimens under different axial compression ratios.The study modeled and validated based on the test parameters,using the finite element analysis software ABAQUS.Results shows that,except for two specimens with weld fracture that led to termination,the remaining specimens exhibited beam hinge damage.Compared with PVC pipes,pre-embedded steel pipes improved the shear capacity of the reinforced concrete column joint area and played a protective role.All six specimens were classified as semi-rigid joints,and pre-embedded steel pipes enhanced initial stiffness and bearing capacity of the joints.However,the impact on initial stiffness and bearing capacity of the joints was found to be less significant.The study reveals that both initial stiffness and bearing capacity of the joints increased with higher axial compression ratio.Finite element simulations using ABAQUS aligned with the test results,validating the modeling method's reasonableness.These findings provide a valuable reference for subsequent research and practical design application of this novel joint type.
reinforced concrete columnsteel beamjointsaxial compression ratiotestsfinite element analysisbearing capacitystiffness
万方数据
维普
