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Seismic Behavior of Non-Ductile Concrete Frame Structures

by Yahya C. Kurama, (S.M.ASCE),
Stephen P. Pessiki, (A.M.ASCE),
Richard Sause, (M.ASCE),
Shaojie Wu, (S.M.ASCE),



Document Type: Proceeding Paper

Part of: Structures Congress XII

Abstract:

Non-ductile reinforced concrete (RC) frame structures designed and constructed during the 1950's through 1970's exist in many regions of the United States. The frames of these structures were designed to resist gravity loads alone, or, in some cases, gravity and moderate wind loads. These structures do not satisfy modern code requirements for seismic resistance. Attention is now on retrofit to improve the seismic behavior of these structures. A rational retrofit of a non-ductile RC structures requires an assessment of its global strength and ductility capacity as limited by the strength and ductility capacity as limited by the strength and ductility capacity of its critical regions. From this assessment, a critical regions can be identified and prioritized for retrofit. This paper presents a part of the ongoing research at Lehigh performance of non-ductile RC frame structures. The research is investigating the seismic performance of non-ductile RC frame structures, and developing retrofit strategies. This paper describes the design of two prototype non-ductile RC frame structures, their seismic behavior as obtained from a series of inelastic static analyses, an the implications of this behavior for retrofit of these structures.

Subject Headings: Reinforced concrete | Concrete frames | Concrete structures | Structural behavior | Gravity loads | Ductility | Wind loads | United States

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