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Civil-Comp Proceedings
ISSN 1759-3433 CCP: 79
PROCEEDINGS OF THE SEVENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: B.H.V. Topping and C.A. Mota Soares
Paper 159
Reliability Analysis of a Steel Frame with Semi-Rigid Connections Z. Balogh+ and M. Iványi*
+Department of Civil Engineering, Metropolitan State College of Denver, United States of America
Full Bibliographic Reference for this paper
, "Reliability Analysis of a Steel Frame with Semi-Rigid Connections", in B.H.V. Topping, C.A. Mota Soares, (Editors), "Proceedings of the Seventh International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 159, 2004. doi:10.4203/ccp.79.159
Keywords: reliability, reliability index, steel frames, semi-rigid connections, probability of failure.
Summary
The influence of random variables of semi-rigid beam-column and column-base
connection parameters on the reliability, with respect to the ultimate load, of a steel
frame previously experimentally tested, is studied. The effect of the random
variables on the failure mode is also presented. The random variables considered are
the yield stress of the steel, and the initial stiffness and moment resistance of the
semi-rigid connections. The histograms of the ultimate load multiplier demonstrate
the sensitivity of the reliability index to the adopted random variables.
This study augments an experimental investigation on full-scale frames aimed at determining the effect of flexibility in the beam-column and column-base connections on the behavior of the frames. The frame test presented in this paper was carried out in the Building Research Laboratory, Department of Steel Structures, Technical University of Budapest (currently Budapest University of Technology and Economics).
The reliability of a structure means the structure's ability of satisfying its
requirements within a given
In this paper the Cornell reliability index [1] is used. In accordance with
Eurocode 3 [2], a second-order elastic-plastic in-plane analysis was applied to
analytically determine the load caring capacity of the semi-rigid steel frame.
The design value was taken for
For the purpose of this sensitivity analysis the mean values for the connection
parameters were taken from the tests and the deviation was taken as 10% of the
mean value [4]. The reliability index The extensive experimental study into the behaviour of semi-rigid connections, showed how the complexities arising from the three-dimensional nature of full-scale tests can be addressed [5]. The sensitivity study of the reliability index of the load carrying capacity of the frame showed that the cumulative effect of multiple random variables erode the value of the reliability index. The effect of base-column connections on the reliability index was less significant than the effect of the beam-column connections. References
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