Earthquake Strengthening of a Twelve Story Non-Ductile Concrete Frame Building with Unreinforced Masonry Using Displacement Control Criterion

by Shafat A. Qazi, David C. Breiholz & Co, Inc, Lomita, United States,



Document Type: Proceeding Paper

Part of: Structural Engineering in Natural Hazards Mitigation

Abstract:

The structural concern with the Cooper Arms Apartment building when subjected to ground shaking was the in-plane and out-of-plane forces on the infill and consequences of the infill resisting in-plane forces as a braced frame system. The area of rpimary focus was the stability of the infill when subjected to out-of-plane forces. The secondary purpose of the analysis was to determine if the bond between the masonry infill and the reinforced concrete frame was strong enough to resist forces induced by ground shaking. Since the Cooper Arms structure is registered as a historical building, the approach for analysis and retrofit has been tp preserve the historical beauty and exterior fabric of the building while achieving the necessary capacity to safely respond to anticipated strong ground motion from future earthquakes. The structural analysis of the Cooper Arms apartment building was performed following a preplanned critical path.

Subject Headings: Earthquake resistant structures | Concrete frames | Masonry | Concrete structures | Structural analysis | Earthquakes | Residential buildings

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