Seismic resilience analysis of self-centering prestressed concrete frames with generalized flag-shaped hysteretic behavior

Zheng, Jule; Zhou, Zhen; Zeng, Bin; Huang, Linjie

doi:10.1016/j.engstruct.2023.116947

Cited by 4 publications

(1 citation statement)

References 29 publications

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“…The research showed that the PPEFF system had a fast construction speed, low labor consumption, and excellent seismic and continuous collapse resistance performance. Jule Zheng [21] compared the seismic resilience of ordinary RC structures with that of flag-shaped hysteretic behavior and proved that in their proposed self-centering, prestressed concrete frame with a generalized flag-shaped hysteretic, the damage mainly came from the damage of acceleration-sensitive non-structural components in the upper floor. Jiang et al [22] put forward a self-centering prestressed prefabricated steel beam-column joint with a weakened dog-bone-shaped flange cover plate, and carried out finite element simulation and experimental studies.…”

Section: Introductionmentioning

confidence: 99%

The Seismic Performance of Self-Centering Ribbed Floor Flat-Beam Frame Joints

Chen,

Wang,

et al. 2024

Buildings

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To achieve rapid post-earthquake repair of self-centering ribbed floor flat-beam frame structures, a ductile hybrid joint consisting of dog-bone-shaped, weakened, energy-dissipating steel bars connected to the upper and lower column sections through high-strength threads is proposed based on the damage control design concept. By moving the ductile energy-dissipating zone out to the locally weakened section of the energy-dissipating steel bars and the locally unbonded prestressed steel bars in the core area, the residual deformation was limited and the seismic performance improved. Based on the working principle of hybrid joints, low cycle loading tests were conducted on two joint specimens to analyze the influence of lateral prestress on the seismic performance of the hybrid joints. Numerical modeling methods were used to compare the position of the energy-dissipating steel bars in the composite layer and the friction performance of the joints. The research results indicated that the hybrid joint had stable load bearing, deformation, and energy dissipation capabilities, with damage being primarily concentrated in the energy-dissipating steel bars. Even at an inter-story displacement angle of 5.5%, the upper and lower column segments remained elastic. After unloading, the connection seam at the joint was closed, and the self-centering performance was good. When the inter-story displacement angle reached 5.5%, the lateral prestress increased from 150 kN to 250 kN, the ultimate bearing capacity of the joint increased by 16.3%, and the cumulative energy consumption increased by 30.0%. The influence of the friction coefficient of the joint surface on the structural performance was set at a threshold of 0.7. When it was less than the threshold, the ultimate bearing capacity and initial stiffness of the joint increased with the increase in the friction coefficient. After reaching the threshold, the increase in the ultimate bearing capacity of the joint slowed down, and the rate of stiffness degradation gradually accelerated. This joint showed excellent seismic performance and can thus achieve post-earthquake repair of structures.

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Section: Introductionmentioning

confidence: 99%