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Steel and Composite Structures Volume 18, Number 6, June 2015 , pages 1405-1421 DOI: https://doi.org/10.12989/scs.2015.18.6.1405 |
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Design and analysis of non-linear space frames with semi-rigid connections |
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Merve Sagiroglu and Abdulkadir Cuneyt Aydin
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| Abstract | ||
| Semi-rigid connections are the actual behavior of beam-to-column connections in steel frames. However, the behavior of semi-rigid connections is not taken into account for the simplicity in the conventional analysis and design of steel frames. A computer-based analysis and design has been studied for the three-dimensional steel frames with semi-rigid connections. The nonlinear analysis which includes the effects of the flexibility of connections is used for this study. It is designed according to the buckling and combined stress constraints under the present loading after the joint deformations and the member end forces of the space frame are determined by the stiffness matrix method. The semi-rigid connection type is limited to the top and bottom angles with a double web angle connection. The Frye-Morris polynomial model is used to describe the non-linear behavior of semi-rigid connections. Various design examples are presented to demonstrate the efficiency of the method. The results of design and analysis of unbraced semi-rigid frames are compared to the results of unbraced rigid frames under the same design requirements. | ||
| Key Words | ||
| semi-rigid connection; stiffness method; space frames; nonlinear analysis; structural analysis; structural design | ||
| Address | ||
| (1) Merve Sagiroglu: Department of Civil Engineering, Erzurum Technical University, Erzurum, 25070, Turkey; (2) Abdulkadir Cuneyt Aydin: Department of Civil Engineering, Ataturk University, Erzurum, 25240, Turkey. | ||