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论文类型：期刊论文
发表时间：2016-09-01
发表刊物：THIN-WALLED STRUCTURES
收录刊物：SCIE、EI、Scopus
卷号：106
页面范围：316-329
ISSN号：0263-8231
关键字：Concrete-filled steel tube; Rectangular section; Thin-walled steel tube; Local bearing forces; FEA model; Bearing capacity, Design formulae
摘要：Rectangular concrete-filled steel tube (CFST) may be subjected to local bearing forces transmitted from brace members while being used as a chord of a truss, and thus development of finite element analysis (FEA) and simple design calculation method for rectangular CFSTs under local bearing forces are very important to ensure the safety and reliable design of such a truss with rectangular CFST chords in engineering practices. A three-dimensional FEA model was developed using ABAQUS software package to predict the performance of thin-walled rectangular CFST under local bearing forces. The preciseness of the predicted results was evaluated by comparison with experimental results reported in the available literature. The comparison and analysis show that the predicted failure pattern, load versus deformation curves and bearing capacity of rectangular CFST under local bearing forces obtained from FEA modelling were generally in good agreement with the experimental observations. After the validation, the FEA model was adopted for the mechanism analysis of typical rectangular CFSTs under local bearing forces. Finally, based on the parametric analysis, simple design equations were proposed to be used to calculate the bearing capacity of rectangular CFST under local bearing forces. (C) 2016 Elsevier Ltd. All rights reserved.