Seismic Analysis of Some Steel Building Frames

by Egor P. Popov, (F.ASCE), Prof.; Dept. of Civ. Engrg., Univ. of California, Berkeley, Calif.,
Vitelmo V. Bertero, (F.ASCE), Prof.; Dept. of Civ. Engrg., Univ. of California, Berkeley, Calif.,

Serial Information: Journal of the Engineering Mechanics Division, 1980, Vol. 106, Issue 1, Pg. 75-92

Document Type: Journal Paper


The design forces specified by standard building codes are smaller than the repeated reversing forces that can be expected to act on a structure during a major earthquake. These large overloads cause the critical elements of a structure to behave inelastically, resulting in large deformations. These effects must be reconized and appraised by designers. In this paper, the state-of-the-art in appraising the inelastic cyclic behavior for three different types of structural steel frames is examined. First, the special features in the analysis of the most widely used moment-resisting frames are considered. This is followed by a review of conventional concentrically braced frames. The paper concludes with comments on a novel bracing system in which the braces are deliberately made eccentric with respect to the beam-column joints.

Subject Headings: Steel frames | Bracing | Seismic tests | Seismic effects | Steel structures | Inelasticity | Structural behavior | Seismic design

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