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Seismic behavior of precast 100 MPa grade HSC frames under reversed cyclic loading
Highlights Seismic behavior of precast 100 MPa grade HSC frame was evaluated. Precast column, composite beam, and CIP beam-column connection was employed. Precast HSC frame achieved an emulative design principle, and a better ductility. A degenerated four-linear restoring forcing model was proposed.
Abstract This paper concerns characterizing the seismic behavior of precast high-strength concrete (HSC) frames. A half-scale, two-story, and two-bay precast HSC frame and a corresponding cast-in-place (CIP) frame were designed, constructed, and tested under reversed cyclic loading according to a prescribed history. The precast HSC frame consisted of precast column, composite beam, and CIP beam-column connection. HSC used had a nominal compressive strength of 100 MPa. Results demonstrate that both frames failed by crushing of concrete at the column bases, exhibiting a mixed sidesway failure mechanism. The hysteresis curves of both frames are arch-shaped without an evident pinching effect, and the energy dissipation capacity of two test frames is close. Also, the precast HSC frame and CIP frame show similar load-carrying capacity, with a difference of less than 1%. Global displacement ductility of the precast HSC frame is 3.75, which increases by 20.9% than that of the CIP frame. Moreover, a degenerated four-linear restoring forcing model for CIP and precast 100 MPa grade HSC frames is proposed.
Seismic behavior of precast 100 MPa grade HSC frames under reversed cyclic loading
Highlights Seismic behavior of precast 100 MPa grade HSC frame was evaluated. Precast column, composite beam, and CIP beam-column connection was employed. Precast HSC frame achieved an emulative design principle, and a better ductility. A degenerated four-linear restoring forcing model was proposed.
Abstract This paper concerns characterizing the seismic behavior of precast high-strength concrete (HSC) frames. A half-scale, two-story, and two-bay precast HSC frame and a corresponding cast-in-place (CIP) frame were designed, constructed, and tested under reversed cyclic loading according to a prescribed history. The precast HSC frame consisted of precast column, composite beam, and CIP beam-column connection. HSC used had a nominal compressive strength of 100 MPa. Results demonstrate that both frames failed by crushing of concrete at the column bases, exhibiting a mixed sidesway failure mechanism. The hysteresis curves of both frames are arch-shaped without an evident pinching effect, and the energy dissipation capacity of two test frames is close. Also, the precast HSC frame and CIP frame show similar load-carrying capacity, with a difference of less than 1%. Global displacement ductility of the precast HSC frame is 3.75, which increases by 20.9% than that of the CIP frame. Moreover, a degenerated four-linear restoring forcing model for CIP and precast 100 MPa grade HSC frames is proposed.
Seismic behavior of precast 100 MPa grade HSC frames under reversed cyclic loading
Xue, Weichen (author) / Hu, Xinyu (author) / Ren, Dongsheng (author) / Hu, Xiang (author)
Engineering Structures ; 243
2021-05-29
Article (Journal)
Electronic Resource
English
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