方形CFST柱结构外部膜片连接(EDCs)的膜片轴向承载力

H. Tjahjanto, G. MacRae, A. Abu, C. Clifton, T. Beetham, N. Mago
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引用次数: 0

摘要

本文对考虑双向荷载的方形钢管混凝土柱弯矩框架结构的外隔膜轴向承载力进行了计算。考虑了三种设计方法:(1)CIDECT法;(2)等效梁法;(3)领带法。通过有限元分析,研究了连接方形钢管混凝土柱的外膜片在不同双向膜片轴向力作用下的性能。结果表明,垂直膜片轴向力对膜片轴向承载力的影响不显著,这与CIDECT法和tie法的假设一致。CIDECT方法,在某些情况下,是不保守的。在考虑的方法中,尽管在某些情况下容量预测过于保守,但tie方法是最合理的方法。在计算膜片轴向承载力时,除考虑膜片外,还考虑了钢管的贡献,从而改进了系扣法。改进的连接法可以准确地预测外膜片连接容量的下限。
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Diaphragm axial capacity for external diaphragm connections (EDCs) in square CFST column structures
This paper evaluates external diaphragm axial capacity in moment frame structures with square concrete-filled steel tubular (CFST) columns considering bidirectional loading. Three design methods were considered: (1) the CIDECT method; (2) the equivalent beam method; and (3) the tie method. Finite element analyses were conducted to investigate the behaviour of an external diaphragm plate connected to a square CFST column under varied bidirectional diaphragm axial forces. It is shown that the perpendicular diaphragm axial forces did not reduce the diaphragm axial capacity significantly, which is consistent with the assumptions made by the CIDECT method and the tie method. The CIDECT method, in some cases, was not conservative. Among the considered methods, the tie method was the most justifiable method, although in some cases the capacity predictions were too conservative. The tie method was later modified by considering the contribution of the steel tube in addition to the diaphragm plate in calculating the diaphragm axial capacity. The modified tie method was shown to accurately predict a lower bound estimate of the capacity of an external diaphragm connection.
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来源期刊
CiteScore
2.50
自引率
17.60%
发文量
14
期刊最新文献
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