Study on mechanical performance of new circular concrete-filled steel tube column-concrete beam reinforcement connector joint
The traditional concrete-filled steel tube column-concrete beam generally uses ring beam connection joints,in response to the ring beam joints with not only multiple beam intersections but also concrete overhanging beams,the construction is difficult,and the connection joint of concrete-filled steel tube column-concrete beam hybrid structure becomes the construction difficulty.Combining with the project experience of adopting steel-concrete hybrid structure in recent years,the new circular concrete-filled steel tube column-concrete beam reinforcement connector joint was proposed.The structure,characteristics and finite element modeling process of reinforcement connector joints were introduced in detail,and the influence of the boundary conditions of reinforcement connectors on the results was investigated by three sets of models using the finite element analysis method.The results show that,the stress of the reinforcement connectors with end-fixed restraints are slightly larger than the remaining two.In addition,an analysis of the influence of the forms of arrangement of rebar was carried out,highlighting the influence of the arrangement form and size of reinforcement connectors on the stress performance of joint with different beam widths was emphatically introduced.The results show that the locations of rebar connection have a direct effect on the stresses of reinforcement connectors,and reinforcement connectors with uniform rebar arrangement are subjected to uniform and reasonable forces.Finally,several strengthening measures for reinforcement connectors were listed,and that adopting 20mm chamfer can effectively reduce the stress concentration at the joint where end plate connects with center rib and edge rib.
NETL
NSTL
万方数据
