Ductile moment connections used in steel column-tree moment-resisting frames

Chen, Cheng-Chih; Lin, Chun Chou; Lin, Chieh Hsiang

doi:10.1016/j.jcsr.2005.11.012

Cited by 77 publications

(22 citation statements)

References 13 publications

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“…Li et al [5] and Zhao et al [6] studied a dog bone-shaped connection, a reduced connection with a long slot, and a bolted-welded connection with enlarged weld access holes and found that good weld quality is the main factor that prevents the brittle fracture of the connections. Chen et al [7,8] investigated the seismic performance of a bolted-welded beam end strengthened connection and proposed a method that strengthens the beam end by forming a plastic hinge in the beam away from the column face. The proposed method could effectively improve the seismic 2 Advances in Materials Science and Engineering performance of beam-column connections.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Seismic Performance of Site-Bolted Beam to Column Connections in Modularized Prefabricated Steel Structures

Liu

Cui

Zheng

et al. 2017

Advances in Materials Science and Engineering

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This paper proposes a site-bolted connection that is suitable for modularized prefabricated steel structures. Excellent ductility is achieved by various structural measures. Six connection specimens with different parameters were subjected to quasi-static loading tests and finite element analysis (FEA) to determine the seismic performance of the proposed connection (e.g., hysteretic behavior, skeleton curve, ductility, and failure mode). The results of the tests and FEA showed that the connection underwent sufficient plastic deformation under cyclic loading and that its ultimate rotation angle could reach 0.09 rad. A clear plastic hinge formed on the beam before the connection failed, which suggests a ductile failure mode. The connection exhibited a wide hysteresis loop, which indicated good seismic performance. The results also showed that the connection does not slip under small earthquakes and could dissipate energy through slippage in the connection region under a moderate earthquake and through slippage in the connection region as well as plastic deformation at the beam end under a severe earthquake. The number of bolts was the main parameter that affected the seismic performance of the connection. The test and FEA results demonstrated that all six specimens had excellent seismic and ductile performance and an exceptional plastic rotation capacity.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Seismic Performance of Site-Bolted Beam to Column Connections in Modularized Prefabricated Steel Structures

Liu

Cui

Zheng

et al. 2017

Advances in Materials Science and Engineering

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“…McMullin [14] and Cheng-chin Chen [15] studied the ductile moment connections used in steel column-tree momentresisting frames. The column-tree is fabricated by welding stub beams to the column in the shop.…”

Section: Introductionmentioning

confidence: 99%

Study on an Innovative Flange Bolted-Welded Connection

Jiao¹,

Zhao²

2015

TOMEJ

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This paper proposes a new type of spliced joint, named flange bolted-welded hybrid joint, which is designed to splice I-shape beam to facilitate the construction of industrialized buildings. The flange, welded with the bottom beam flange as well as the web close to bottom flange, are jointed by high strength bolts. Stiffening plate is welded at top of the flange while downhand welding and high strength friction grip bolts are used for the top beam flange and the beam web, respectively. The connection reduces the construction period and costs. In this paper, monotonic and reversed cyclic loading tests were conducted on three full-scale specimens of this innovative joint to investigate its load-bearing capacity, energy-dissipating capacity and failure modes. The results indicate that the joint has high load-bearing capacity and great ductility. The failure mode is due to the slippage of flange bolts as well as the gap development between the two flange plates. The experimental studies enabled improvement of the design of the connection to be used in moment-resisting steel frame structures.

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“…The failure mode of these specimens was the fracture of the beam flange. In order to avoid the occurrence of brittle fractures in column-tree connections, Chen et al (2006) presented the widened flange columntree connections, in which two distinct connection detail improvements were made, namely, elimination of the weld access hole and widening of the flanges of the stub beam. These were applied to column-tree connections to diminish the potential for brittle fracture caused by the peak plastic strain demand in the weld access hole region.…”

Section: Introductionmentioning

confidence: 99%

Cyclic testing of steel column-tree moment connections with weakened beam splices

Chen

et al. 2014

Int J Steel Struct

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Traditionally, the beam splice assemblies of column-tree connections are designed according to the full-strength design principle. Actually, the beam splice is set up at a certain distance from the column face, thus the plastic moment capacity of the beam splice does not need to be greater than the plastic moment capacity of the beam. This paper experimentally presents the effects of the weakened beam splice on the seismic performance of column-tree steel moment connections. Cyclic tests of two column-tree connection specimens with weakened beam splices and one specimen following the full-strength design principle were conducted to verify their inelastic behavior and failure modes. The test results showed that the moment resisting capacity of the column-tree connection specimens with weakened beam splices did not obviously decrease. Also, their energy dissipation capacity was better than that of the specimen following the full-strength design principle.

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Ductile moment connections used in steel column-tree moment-resisting frames

Cited by 77 publications

References 13 publications

Analysis of the Seismic Performance of Site-Bolted Beam to Column Connections in Modularized Prefabricated Steel Structures

Analysis of the Seismic Performance of Site-Bolted Beam to Column Connections in Modularized Prefabricated Steel Structures

Study on an Innovative Flange Bolted-Welded Connection

Cyclic testing of steel column-tree moment connections with weakened beam splices

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