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Earthquake collapse analysis of steel frames
Author(s) -
Challa V. R. Murty,
Hall John F.
Publication year - 1994
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290231104
Subject(s) - structural engineering , stiffness , frame (networking) , column (typography) , beam (structure) , planar , moment (physics) , progressive collapse , mechanism (biology) , steel frame , engineering , seismic analysis , geology , computer science , physics , connection (principal bundle) , mechanical engineering , reinforced concrete , classical mechanics , computer graphics (images) , quantum mechanics
The non‐linear response of planar moment‐resistant steel frames is investigated with regard to P ‐Δ‐type collapses under severe earthquake ground motions. The frame model employs configuration updating, fibre‐type beam‐column members with geometric stiffness, panel zone elements at the beam‐to‐column junctions, and realistic hysteretic relations which are used for both the fibres and panel zones. Frame design follows the 1991 Uniform Building Code, and three panel zone designs are considered. It is found that P ‐Δ collapse of the 20‐storey frame examined results from the formation of a collapse mechanism involving the lowest few stories. Column hinging occurs even though the code requirement that column strength exceed beam strength is satisfied. Among the different panel zone designs, the weakest one proved most resistant to developing a collapse mechanism in the frame.