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author:

Ma, Yongchao (Ma, Yongchao.) [1] | Qi, Ai (Qi, Ai.) [2] (Scholars:祁皑) | Yan, Guiyun (Yan, Guiyun.) [3] | Zheng, Lianqiong (Zheng, Lianqiong.) [4] | Xue, Panrong (Xue, Panrong.) [5]

Indexed by:

Scopus SCIE

Abstract:

A novel precast replaceable beam-to-column joint with energy-dissipating steel hinges was proposed for the connection of precast structures to improve the seismic performance and post-earthquake resilience. The proposed joint was installed in the predetermined plastic hinge region at beams and the flange segments of the proposed joint were weakened to achieve damage concentration. Cyclic loading tests were conducted on the proposed joint and the steel sleeve confined concrete joint to study the hysteretic performance, including failure mode, load-displacement curves, ductility, and energy-dissipation capacity. Moreover, the hystertic performance of the damage-repaired proposed joint was investigated to verify the post-earthquake resilience. Results demonstrated that the proposed joints could develop favorable failure mode with the necking rupture of the weakened steel plate in steel hinge. The damage of the proposed joint was concentrated in the energy-dissipating hinges while no serious damage was observed in the precast framing components, achieving the objective of damage concentration. Compared with steel sleeve confined concrete joint, the hysteresis curve of proposed joint was more plump while an obvious pinching effect was observed in the steel-confined concrete joint. The bearing capacity and energy-dissipation capacity of the proposed joint were about 1.25 times and 1.55 times of that for the steel sleeve confined concrete joint, respectively. In addition, the hysteretic performance of the repaired specimen was identical to the original one, with the desired failure mode caused by the fracture of the steel hinge. It was noted that the hysteretic performance of the repaired joint was better than the steel sleeve confined concrete joint. The bearing capacity was recovered at up to 96.6% of the original joint while the energy-dissipation capacity was recovered at 96.1%, indicating that the proposed joint achieved the post-earthquake resilience to a great extent.

Keyword:

cyclic loading test damage concentration energy-dissipating steel hinges post-earthquake resilience replaceable beam-to-column joint

Community:

  • [ 1 ] [Ma, Yongchao]Fuzhou Univ, Coll Civil Engn, Fuzhou 350108, Peoples R China
  • [ 2 ] [Qi, Ai]Fuzhou Univ, Coll Civil Engn, Fuzhou 350108, Peoples R China
  • [ 3 ] [Ma, Yongchao]Fujian Univ Technol, Coll Civil Engn, Fuzhou 350118, Peoples R China
  • [ 4 ] [Yan, Guiyun]Fujian Univ Technol, Coll Civil Engn, Fuzhou 350118, Peoples R China
  • [ 5 ] [Zheng, Lianqiong]Fujian Univ Technol, Coll Civil Engn, Fuzhou 350118, Peoples R China
  • [ 6 ] [Xue, Panrong]Fujian Prov Erjian Construct Grp Corp Ltd, Fuzhou 350001, Peoples R China

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Source :

BUILDINGS

ISSN: 2075-5309

Year: 2022

Issue: 8

Volume: 12

3 . 8

JCR@2022

3 . 1 0 0

JCR@2023

ESI Discipline: ENGINEERING;

ESI HC Threshold:66

JCR Journal Grade:2

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 1

SCOPUS Cited Count: 1

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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