Conference Publication Details
Mandatory Fields
Goggins J. M., Broderick B. M., Elghazouli A. Y.
Proceedings of 6th International Conference on Steel and Aluminium Structures
Investigation of the performance of concentrically braced steel frames during earthquakes
Optional Fields
Concentrically braced frame Steel Structures Structural Engineering Earthquake Engineering Earthquake Seismic Design Testing Structural Hollow Sections Eurocode 8
Oxford, England
In this paper, the Eurocode 8 design approaches for concentrically-braced steel frames are assessed against the results of shake table tests on a set of single storey braced frames and a series of correlative nonlinear analyses. The test programme investigated the influence of brace slenderness on the stiffness, resistance and ductility displayed by the frame under earthquake loading. Several sources of member and frame overstrength, which play an important role in seismic performance and design, are identified. The tension-based design approach largely adopted in design is examined together with the member slenderness limits imposed on the bracing members. It is observed that the bracing members with slenderness exceeding the codified limits demonstrated generally satisfactory performance. The results of nonlinear time-history and push-over analyses are observed to agree well with the experimental results, especially with respect to brace tension forces and frame base shear. These are used to support conclusions drawn from the test results.
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