Research On Shear Behavior Of Steel Beam To CFST Column Connections

Recently, concrete filled steel tube structure have been widely applied to practical projectbecause of the superior mechanical property and more and more researches were proceedingby the following. Connections are important components for the CFST structure. Therefore,the design of connections is the key point for the popularizing and using of CFSTstructure.This paper researched the shear mechanical property of CFST column-steel beamjoints. The main works were shown as follows:(1) On the basis of reading references, the finite element models of CFST column-steelbeam joints were set up by the rules of the design of connections in the standard. There aresome advantages of these styles of connections: simple in construction, explicit in forcetransmission, fewer stress concentration than other connections with stiffening ring.(2) The models were proved to be reasonable through many typical calculations. On thatbasis, the overall processes of CFST column-steel beam joints at monotonous loading wereanalyzed. With the results of research, shear capacity was fixed by studying strain-stressrelation in microcosmic view and the fracture morphology in macroscopic view.(3) The main parameters influence on shearing force-shearing deformation relation wereanalyzed. Based on the result of simulation analysis, the shear capacity formulas wereproposed. Also the formulas were verified by comparing the finite element calculation with tformulas calculation, the consequence proved to be reasonable. Thus, the research can providesome design advice for the practical project.(4) Based on the theory of modeling CFST column-steel beam joints in a plane, the spacejoints were designed and the shear capacity was also analyzed under different loadcarryingcondition. Preliminary study on shear capacity of space joints was carried out with somesimple parameter analysis...