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Title: Large-Scale Tests on Cyclic Behavior of Self-Centering Prestressed Concrete Frames

Author(s): Tong Guo, Lianglong Song, Zhiliang Cao, and Yu Gu

Publication: Structural Journal

Volume: 113

Issue: 6

Appears on pages(s): 1263-1274

Keywords: beam-column connection; column-base connection; posttensioned; residual drifts; self-centering frame

DOI: 10.14359/51689248

Date: 11/1/2016

Abstract:
This paper presents the large-scale experimental investigations of two types of half-scale, one-story, two-bay self-centering (SC) concrete frame systems, and a conventional reinforced concrete (RC) frame system. The first SC frame system—self-centering reinforced column base (SCRB)—represents an SC frame with conventional reinforced column bases (RBs), while the second SC frame system—self-centering post-tensioned column base (SCPB)—represents an SC frame with post-tensioned column bases (PBs). The frame system RC represents a conventional RC frame. All the specimens had identical overall geometry and were tested under quasi-static reversed cyclic lateral loading. The SCRB and RC frames were designed with the same beam-column and column-foundation connection strength, and comparisons were made with regard to the lateral strength, ductility, residual deformation, and energy dissipation characteristics. Comparison of results with the RC frame showed that the SCRB frame had comparable lateral strength and deformation capacity but smaller energy dissipation. In addition, the SCRB frame experienced reduced damage at the beam-column connection regions and better overall recentering capacity, as compared with those of the RC frame. The influence of different design parameters on the seismic behavior of SCPB frame system was experimentally examined, and it is observed that the SCPB frame system sustained negligible residual drifts.