Restoring force model of precast concrete-filled steel tube column- to-RC beam connections with energy-dissipating bolts

ZHANG Yue, LI Dongsheng

Journal of Building Structures ›› 2023, Vol. 44 ›› Issue (04) : 309-318.

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Journal of Building Structures ›› 2023, Vol. 44 ›› Issue (04) : 309-318. DOI: 10.14006/j.jzjgxb.2020.0557
Fundamental theories and general technologies

Restoring force model of precast concrete-filled steel tube column- to-RC beam connections with energy-dissipating bolts

  • ZHANG Yue1, LI Dongsheng2
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Abstract

The precast concrete-filled steel tube column-to-RC beam connections with energy-dissipating bolts and prestressed tendons were proposed. Eight cruciform beam-column joints were tested under low cyclic loading, and the failure characteristics of the joints were summarized. The calculation methods of bearing capacity of the precast RC beam-column joints in yield and limit states were proposed, and a trilinear skeleton curve model was established. The stiffness degradation regularity and hysteretic rule were obtained, and the restoring force model of the precast beam-column connection was established. The theoretical results were compared with the experimental results. The results show that the energy dissipated steel bar can dissipate energy through tension, and the bearing capacity of the specimen decreases due to the plastic hinge on the beam. The proposed skeleton curve model and restoring force model are in good agreement with the test results. The proposed models can accurately simulate the force-deformation relationships of the proposed beam-column connections of the precast structure under earthquake, and provide a theoretical basis for engineering design and seismic analysis.

Key words

precast beam-column joint / concrete-filled steel tube column / bearing capacity calculation / restoring force model

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ZHANG Yue, LI Dongsheng. Restoring force model of precast concrete-filled steel tube column- to-RC beam connections with energy-dissipating bolts[J]. Journal of Building Structures, 2023, 44(04): 309-318. https://doi.org/10.14006/j.jzjgxb.2020.0557

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