Development of High Seismic Performance Concrete Frames


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Title: Development of High Seismic Performance Concrete Frames

Author(s): Y. Sun and T. Fukuhara

Publication: Special Publication

Volume: 228


Appears on pages(s): 615-632

Keywords: concrete frame; confinement effect; high-strength concrete; hoop-confinement; residual story deformation; seismic performance; tube-confinement; ultimate load capacity

Date: 6/1/2005

Four one-bay and one-story high-strength concrete frames were made and tested under reversed cyclic lateral force while subjected to high axial compression. Test results have indicated that confinement of high-strength concrete columns in frame by steel tube in stead of conventional hoop and use of high-strength steels as longitudinal rebars of the frame members could not only assure ductile seismic performance to the frame under high axial compression, but also reduce the residual story deformation to acceptable level. The damages in hoop-confined reinforced concrete beam were also significantly mitigated. In addition, a design formula was proposed to evaluate the ultimate lateral load capacity of the confined high-strength concrete frame. Good agreement between the theoretical ultimate lateral loads and the measured results verified validity of the proposed formula.