Numerical study on seismic behaviours of ConXL biaxial moment connection

Chao, Yang; Yang, Jing; Su, Mingzhou; Liu, Cheng-Zong

doi:10.1016/j.jcsr.2016.02.013

Cited by 26 publications

(14 citation statements)

References 12 publications

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“…A slight pinching at an axial load of 75% the column capacity is observed for 1B, 2BC and 2BI models. In models 3B and 4B the pinching greater than other models even where complies the requirements according to [9]. When an increase in the column axial load occurred, plastic strains in the column walls appeared, which explain the loss of resistance in the hysteretic behavior at an axial load of 75% the column capacity.…”

Section: Hysteretic Behaviorsupporting

confidence: 52%

“…However, it is unlikely that there was an axial load of 75% the column capacity on columns that belonged to special moment frames that comply with the drift according to the standards. Therefore, column and connection elements showed stresses in elastic range, which is acceptable according to [9].…”

Section: Failure Mechanismmentioning

confidence: 83%

“…An equivalent load-displacement method for 2D and 3D joints is employed according to [9]. Based on the above equivalent column top hysteresis curves, the hysteresis behaviors of different joint configurations can be compared through stiffness, equivalent damping and energy dissipation [28].…”

Section: Seismic Performance For Different Jointsmentioning

confidence: 99%

“…A numerical study on the response under biaxial loading of the connection was conducted by [9] using the finite element method and considering 3D joints and different axial load levels (0.2, 0.4, 0.6 and 0.8 Py, where Py = FyAg, Fy is yield stress and Ag is gross area of section). The results obtained showed a ductile failure mechanism according to the seismic provisions [6] philosophy.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical Study on Cyclic Response of End-Plate Biaxial Moment Connection in Box Columns

Gallegos

Núñez

Herrera

2020

Metals

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The 2008 Wenchuan-China earthquake showed the importance of considering the bidirectional seismic action as a cause of failure in column hinge mechanisms. Subsequently, the large 2011 Tohoku-Japan earthquake revealed that Special Moment Frames buildings, made of tubular columns (Hollow Structural Section or Built-up Box Section) and rigid connections with I-beams, did not suffer serious damage. However, only the ConXtech® ConXL™ moment connection has been prequalified according to the (American Institute of Construction) AISC Seismic Provisions for use with tubular columns and the rest of connections do not consider biaxial resistance. The research reported herein investigated the cyclic response of box-columns joints, connected to I beams using the four-bolt extended endplate connection, subjected to bidirectional bending and axial load on the column. To conduct the study, complex nonlinear finite element models (FEMs) of several I beam to box column joint configurations were constructed and analyzed under cyclic loading using the ANSYS software. The results reveal that the failure is concentrated in the beams of all joint configurations except for the columns with axial load equal to 75% of the column capacity, where a combined failure mechanism is achieved. The energy dissipation capacity of joints with a greater number of beams is lower than joints with fewer beams. The bidirectional effect of the seismic action and the level of axial load must be considered to avoid the formation of a column-hinge fragile failure mechanism also the behavior exhibited by 3D joints is more realistic than 2D joints according to real structures.

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Section: Hysteretic Behaviorsupporting

confidence: 52%

Section: Failure Mechanismmentioning

confidence: 83%

Section: Seismic Performance For Different Jointsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Study on Cyclic Response of End-Plate Biaxial Moment Connection in Box Columns

Gallegos

Núñez

Herrera

2020

Metals

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“…Following the equivalent load-displacement method outlined in [19], a seismic assessment was performed for 2D and 3D joints. A comparison of the load-rotation curves, secant and tangent stiffness, equivalent damping and energy dissipation, as defined in [20], was carried out.…”

Section: Seismic Assessmentmentioning

confidence: 99%

Bidirectional Response of Weak-Axis End-plate Moment Connections: Numerical Approach

Núñez

Parraguez

Herrera

2020

Metals

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Brittle failure mechanisms can affect the seismic performance of structures composed of intersecting moment resisting frames, if the biaxial effects are not considered. In this research, the bidirectional cyclic response of H-columns with weak-axis moment connections was studied using numerical models. Several configurations of joints with bidirectional effects and variable axial loads were studied using the finite element method (FEM) in ANSYS v17.2 software. The results obtained showed a ductile behavior when cyclic loads are applied. No evidence of brittle failure mechanisms in the studied joint configurations was observed, in line with the design philosophy established in current seismic provisions. However, beams connected to the column minor axis reached a partially restrained behavior. Joints with four beams connected to the column exhibited a partially restrained behavior for all axial load levels. An equivalent force displacement method was used to compare the hysteretic response of 2D and 3D joints, obtaining higher deformations in 3D joints with respect to 2D joints with a similar number of connected beams. Consequently, design procedures are not capable of capturing the 3D deformation phenomenon.

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Seismic Performance Verification of Rapid-Disassembly Carbon-Minimized Dismantle Connection

Choi,

Kim,

Kim

et al. 2024

Lecture Notes in Civil Engineering

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Numerical study on seismic behaviours of ConXL biaxial moment connection

Cited by 26 publications

References 12 publications

Numerical Study on Cyclic Response of End-Plate Biaxial Moment Connection in Box Columns

Numerical Study on Cyclic Response of End-Plate Biaxial Moment Connection in Box Columns

Bidirectional Response of Weak-Axis End-plate Moment Connections: Numerical Approach

Seismic Performance Verification of Rapid-Disassembly Carbon-Minimized Dismantle Connection

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