Capacity Curves for Reinforced Concrete Buildings Designed in Accordance With Portuguese Regulation

Abstract eng:
In recent decades, more specifically in the last 50 years, has been observed a growing concern related to seismic risks in large urban areas. Thus, as a result directly related to this awareness, new methods of analysis and design have been created and developed allowing the structures to become more resistant and seismically safe. Currently the civil engineering structures are designed to be able to survive the worst actions expected to occur during its lifetime. As such, the structures must be designed and analyzed to be endowed with the capacity to withstand the demands faced, being subject to a complex process of design covering various aspects, not just the structural and seismic safety but also other complementary aspects related to occupant safety and comfort. This paper aims to disseminate the results obtained from the assessment of the resisting capacity of regular buildings designed in accordance with the application of the 1983 Portuguese regulation regarding the seismic action in current buildings, following the requirements of Regulamento de Estruturas de Betão Armado e Pré-Esforçado (REBAP) e o Regulamento de Segurança e Ações para Edifícios e Pontes(RSA). In these, buildings seismic analysis was based on RSA, which allowed obtaining earthquake actions equivalent forces, to be applied in each of the floors, and the resisting capacity, estimated through nonlinear static analysis (pushover). Some final remarks are presented and discussed, as well as envisaged future developments of the work in what concerns the definition of damage state thresholds and the development of analysis based on specific performance levels.

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