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作者:

Jiang, Zi-qin (Jiang, Zi-qin.) | Dou, Chao (Dou, Chao.) | Zhang, Ai-lin (Zhang, Ai-lin.) | Wang, Qi (Wang, Qi.) | Wu, Ying-xia (Wu, Ying-xia.)

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EI Scopus SCIE

摘要:

Earthquake-resilient functionality has become a leading issue in seismic engineering, and as an important component of earthquake-resilient, cross joints have become a research hotspot. A new type of earthquake-resilient prefabricated cross joint (ERPCJ) with L-shaped plates for damage control have been proposed in this study. The new type of prefabricated cross joint is constructed of a circular tubular steel column with a cantilever beam, a common beam, and a connection device consisting of a flange cover plate, L-shaped plates, and high-strength bolt groups. By controlling the thickness of the flange cover plate and the distance of the middle bolt, the rigidity of the connection can be adjusted so that the frictional sliding of the bolt and the plastic deformation of the flange cover plate can dissipate energy and ensure that the beams, columns, and other primary components do not undergo plastic failure. To study the seismic performance and earthquake-resilient performance of this new type of cross joint, three specimens were designed and fabricated. Unequal amplitude low cyclic loading tests were carried out on the three designed specimens, while 30 laps of an equivalent amplitude low cyclic loading test was carried out on a repaired specimen. The hysteresis curves, skeleton curves, and failure modes of the specimens were obtained. The effect of the distance of the middle bolt, shape of the bolt holes, and repair test on the seismic performance of the joints were investigated. The experimental results indicate that the joint can effectively utilize the plastic deformation of the flange cover plate and the sliding of the bolt for energy dissipation. Adjusting the middle bolt distance had a significant effect on the bearing capacity and energy dissipation capacity of the joint. Changing the form of the bolt hole from circular hole to slotted hole effectively improves the ductility of the joint. The repaired joint retained its good energy dissipation capability, indicating that the joint has a good post-earthquake restoring performance and can be used as a displacement-control damper.

关键词:

Seismic performance Straight dog-bone weakening Earthquake-resilient Damper Post-earthquake restoring performance Flange cover plate

作者机构:

  • [ 1 ] [Jiang, Zi-qin]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Zhang, Ai-lin]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Wang, Qi]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Wu, Ying-xia]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Jiang, Zi-qin]Beijing Engn Res Ctr High Rise & Large Span Prest, Beijing 100124, Peoples R China
  • [ 6 ] [Zhang, Ai-lin]Beijing Engn Res Ctr High Rise & Large Span Prest, Beijing 100124, Peoples R China
  • [ 7 ] [Wang, Qi]Beijing Engn Res Ctr High Rise & Large Span Prest, Beijing 100124, Peoples R China
  • [ 8 ] [Wu, Ying-xia]Beijing Engn Res Ctr High Rise & Large Span Prest, Beijing 100124, Peoples R China
  • [ 9 ] [Dou, Chao]Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China

通讯作者信息:

  • [Dou, Chao]Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China

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来源 :

ENGINEERING STRUCTURES

ISSN: 0141-0296

年份: 2019

卷: 184

页码: 74-84

5 . 5 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:136

JCR分区:1

被引次数:

WoS核心集被引频次: 68

SCOPUS被引频次:

ESI高被引论文在榜: 0 展开所有

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