Abstract
This paper presents an innovative bolt model suitable for the three dimensional finite element analysis (FEA) of the semirigid beam-to-column bolted connections. The model is particularly useful for the moment-rotation relationship of beam-tocolumn connections, especially in cases where the connectors such as endplates, angles, T-stubs, are not particularly thin. In this paper, the bolt tensile behavior is firstly discussed by using a refined finite element model, in which the complex geometries of both external and internal threads were modeled. Then, the bolt behavior predicted by the commonly used models was compared with that of the refined FEA to appraise the accuracy of these models. The comparison shows most of the models commonly used can not predict accurately the axial stiffness, carrying capacity and ductility of bolt simultaneously. Afterwards, an innovative bolt model was proposed and the model accorded with the refined FEA for single bolts. Finally, the proposed model was applied to analyze the moment-rotation behavior of several experimented and well documented connections with different configurations. The results indicate that the proposed model is feasible and efficient.
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Note.-Discussion open until February 1, 2013. This manuscript for this paper was submitted for review and possible publication on September 29, 2011; approved on July 27, 2012.
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Wu, Z., Zhang, S. & Jiang, SF. Simulation of tensile bolts in finite element modeling of semi-rigid beam-to-column connections. Int J Steel Struct 12, 339–350 (2012). https://doi.org/10.1007/s13296-012-3004-8
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DOI: https://doi.org/10.1007/s13296-012-3004-8