Modelling and parametric study of self-centering reinforced concrete frame structures

摘要

The beam-column and column-base connections of the self-centering reinforced concrete framesrnin this paper are allowed to open at beam ends and uplift at column bases by releasing thernconstraints, while rubber and prestressed tendons are introduced to ensure the self-centering ofrnthe structure. The seismic performance of the self-centering frames was investigated throughrnnonlinear numerical modelling. Analytical models using OpenSEES are developed to study thernseismic performance of the self-centering frames, and a parametric study is carried out. Thernparameters, such as the relative beam-to-column stiffness, rubber thickness, and the prestressedrntendons on the behavior of the structures are investigated. Through this study, it is recommendedrnto use relatively strong beams, more prestressed tendons, appropriately thick rubber blocks andrnprestressed tendons with proper positions to ensure the seismic performance and the selfcenteringrncapability of the structure.