CAJ | 학술논문

利用有限元软件ABAQUS分别对空心截面T型管节点和主管中填充混凝土T型管节点在支管端部平面内弯曲荷载作用下的静力强度进行了研究。有限元模型的可靠性通过已有文献中的圆钢管混凝土N型管节点的试验结果进行了验证。利用有限元模型分别对3个主管中未填混凝土和3个主管中填充混凝土的T型管节点的静力强度进行分析。结果表明，主管中填充混凝土能显著的提高管节点的抗弯承载力。在此基础上，对钢管混凝土T型节点进行参数分析，参数包括支主管直径比β，主管直径与2倍主管壁厚比γ，支主管壁厚比τ，钢材屈服强度fy 和混凝土的抗压强度fc 。分析表明，参数β，γ，τ和fy 对T型节点抗弯承载力有显著影响，而混凝土的抗压强度fc对节点的承载力影响不大。
이용유한원연건ABAQUS분별대공심절면T형관절점화주관중전충혼응토T형관절점재지관단부평면내만곡하재작용하적정력강도진행료연구。유한원모형적가고성통과이유문헌중적원강관혼응토N형관절점적시험결과진행료험증。이용유한원모형분별대3개주관중미전혼응토화3개주관중전충혼응토적T형관절점적정력강도진행분석。결과표명，주관중전충혼응토능현저적제고관절점적항만승재력。재차기출상，대강관혼응토T형절점진행삼수분석，삼수포괄지주관직경비β，주관직경여2배주관벽후비γ，지주관벽후비τ，강재굴복강도fy 화혼응토적항압강도fc 。분석표명，삼수β，γ，τ화fy 대T형절점항만승재력유현저영향，이혼응토적항압강도fc대절점적승재력영향불대。
The static strengths of circular hollow section ( CHS ) tubular T-joints and corresponding T-joints with concrete filling in the chord member under in-plane bending load at the brace end are investigated by using finite element analysis software ABAQUS. The finite element model is firstly verified by comparing the predicted results with reported experimental results on concrete-filled circular tubular ( CFCT ) N-joint. Thereafter, the static strengths of three CHS T-joints and three CFCT T-joints are analyzed using the verified model. The numerical re-sults show that concrete filled in the chord member can significantly improve the flexural capacity of the joints. Fur-thermore, parametric analyses on CFCT T-joints are conducted. The parameters include brace-to-chord diameter ra-tio β, chord diameter-to-wall thickness ration γ, brace-to-chord wall thickness ratio τ, yield strength of steel fy , and strength grade of concrete fc . The results indicate that the parameters of β,γ,τ and fy have significant effect on the static strength of CFCT T-joints. However, the effect of the strength grade of concrete fc is minor.