| The prefabricated steel-concrete composite structure refers to a structural system built by on-site assembly,which has the the advantages of fast installation,high construction quality,environmental protection,and high degree of modularity.The installation process of the steel-concrete composite structure in the current engineering application involves a lot of welding work,which will increase the complexity of the construction,and there is no quality guarantee for the field welding and the anti-corrosion,which restricts the application of prefabricated composite structures in engineering.To this end,this paper has carried out a research on the performance of a new type of assembled full-bolted steel-concrete composite structure system.The system has the characteristics of high assembly rate,full bolt connection,and no formwork for construction.And the system has a wide range of applications,which can be used for high-rise residential,high-rise commercial,multi-storey factories,villas,etc.In this paper,the two-stage capacity of the ribbed U composite beam,the rotational stiffness and bearing capacity of the new beam-column joints,and the overall seismic performance of the structure are studied respectively.The research of ribbed U-shaped composite beams focuses on the stability of U beams in the construction phase and the bearing capacity in the use phase.By changing the arrangement of the stiffeners,the influence of the stiffeners on the distortional and overall buckling of the U-shaped beam is studied.Based on the assumption of full plasticity of the section,a balance equation is established to solve the flexural capacity formula of the ribbed U-shaped composite beam.Designed a fully bolted concrete-filled steel tube column composite beam node,analyzed the force of the plane frame,and obtained the force characteristics of the center column node;According to the stress characteristics of the center column node,the failure form of the beam-column node is analyzed,and the bearing capacity formula of the key part of the beam-column node is given,which ensures the theoretical reliability of the node.The method of numerical analysis is used to monotonically load the beam-column joints.For full-bolt beam-column connections.Analyzed the force and deformation of node columns,bolts and end plates,The influence of factors such as steel content,axial compression ratio,end plate thickness,end plate strength,bolt strength and bolt diameter on the initial stiffness and ultimate bearing capacity of the joint is analyzed.And compared with the code,verify that the full-bolt beam-column node meets the limit requirements of the rigid node.The research on seismic energy dissipation performance of high-rise prefabricated composite structure residential system is The seismic performance of a high-rise building which analyzed by yjk software.The elasticity and elastoplastic time history analysis of the structure is carried out,And compared with the traditional I-beam system to verify the performance of the system structure under earthquake action. |
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