Research Article
May 1972
Beam-Column Subassemblages Under Repeated Loading
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VIEW THE REPLYAuthors: Vitelmo V. Bertero, M.ASCE, Egor P. Popov, F.ASCE, and Helmut KrawinklerAuthor Affiliations
Publication: Journal of the Structural Division
Volume 98, Issue 5
Abstract
The behavior of two types of structural steel half-scale subassemblages of a multistory unbraced frame have been investigated experimentally. These subassemblages were subjected to simulated gravity and cyclic seismic loads. The results obtained in the tests of the upper story specimens show that the weakest element of the subassemblage was the panel zone, where large shear deformation and diagonal buckling occurred. The weakness of the subassemblages representing a lower story, was associated with lateral torsional instability of the beams, which was triggered by local instabilities. From the interpretation of the results, it is concluded that for an efficient design of earthquake resistant structure, it is advisable to have a design which provides a balance between the inelastic deformations, which may take place in each of the critical regions (beam ends and panel zone). It also appears that the energy absorption and dissipation capacity of properly designed steel subassemblages exceeded the required energy even for cases of extreme earthquakes.
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Published In
Journal of the Structural Division
Volume 98 • Issue 5 • May 1972
Pages: 1137 - 1159
Copyright
© 1972 American Society of Civil Engineers.
History
Published in print: May 1972
Published online: Feb 1, 2021
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Authors
Affiliations
Vitelmo V. Bertero, M.ASCE
Prof. of Civ. Engrg., Univ. of California, Berkeley, Calif.
Egor P. Popov, F.ASCE
Prof. of Civ. Engrg., Univ. of California, Berkeley, Calif.
Helmut Krawinkler
Asst. Research Engr., Dept of Civ. Engrg., Univ. of California, Berkeley, Calif.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.