Experimental seismic behaviour of bottom-through-diaphragm and top-ring connection to SST columns

Cao, Shuangyin; Shu, Ganping; Lin, Kunhong; Qin, Ying

doi:10.1016/j.jcsr.2018.08.025

Cited by 16 publications

(4 citation statements)

References 18 publications

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“…Chen et al [5] conducted static performance tests and finite element analysis on six CFST columns as well as steel beam joints featuring reinforced diaphragms, which showed that the stiffness of joints with partial stiffening diaphragms equaled 89% as that of joints with full stiffening diaphragms. Cao et al [6] indicated that the five-layer through-bottom reinforcing rings and top-ring-to-column connection had good ductility and excellent dissipative properties in cyclic tests. The experimental research and finite element analysis conducted by Zhang et al [7] investigated four types of joints in circular CFST column steel beams with outer diaphragms, revealing that the failure mode significantly influences the stress distribution characteristics within the joint area.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Mechanical Properties of Bolted Connections between Concrete-Filled Tubular Columns and Steel Beam with Reinforcing Rings

Pan,

Ma,

Cao

et al. 2024

Buildings

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To study the mechanical performance of bolted connections with different structural forms of reinforced rings, based on the results of monotonic loading tests on two bolted connections between a concrete-filled steel tubular column and a steel beam with an outer reinforcing ring, this article uses ABAQUS v.2020 software to establish a three-dimensional refined finite element analysis model of such connections using appropriate constitutive models for concrete and steel. Subsequently, the effect of the dimensions of the steel beam, reinforcing ring, and cover plate on the load-bearing properties and the failure mechanism of the connections is investigated, and the numerical model is consistent with the verification test results. Then, the numerical simulations comparing bolted exterior reinforced rings under seven different construction measures (i.e., number of bolts, stiffeners) based on a conventional welded exterior reinforced rings with rigid connections (i.e., CGJ) are standardized. The research results indicate that when four rows of bolts are introduced on exterior reinforced rings, the web of steel beam is welded with stiffeners, and the top and bottom reinforced rings are also added with stiffeners; this bolted connection with an external reinforcing ring (i.e., GZ-7) can achieve the rigidity and load-bearing capacity of a fully welded external reinforcing ring rigid connection. At the same time, the reinforcing ring plate is bolted to the flange of the steel beam, and the force transmission path at the connection is changed to avoid the brittle fracture easily caused by the welded flange joints. It is also in line with the development trend of sustainable construction of “assembly” and “disassembly”.

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Section: Introductionmentioning

confidence: 99%

Optimization of the Mechanical Properties of Bolted Connections between Concrete-Filled Tubular Columns and Steel Beam with Reinforcing Rings

Pan,

Ma,

Cao

et al. 2024

Buildings

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“…Among the main forms of beam-column joints, the joints with external diaphragms have the advantages of clear force transmission, good plasticity, high bearing capacity, and strong energy dissipation capacity [5][6][7][8]. Because of its own structural characteristics, this joint enables the plastic hinge to occur first in the beam section, allowing the beam to dissipate energy during the seismic event and thus ensure the column does not lose its load-bearing capacity [9,10]. However, due to a large amount of on-site construction work and high requirements for weld quality, the external diaphragm joints are rarely used.…”

Section: Introductionmentioning

confidence: 99%

Moment-Rotation Model of External Cover Plate Joints Between Steel Beams and Concrete-Filled Square Steel Tubular Columns With Inner I-Shaped CFRP Profile

2023

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As a new type of beam-column joint, external cover plate joints can be used in concrete-filled square steel tubular (CFSST) structures. To accurately analyze the mechanical characteristics of this novel joint during structural design, it is necessary to investigate the moment-rotation relationships. Based on the analysis of the force-transferring mechanism, the formulas to decide the initial rotation stiffness and ultimate bending moment are founded by using the component analysis method, while the finite element analysis results are also utilized to verify these formulas. Considering the advantages and disadvantages of the existing typical moment-rotation models, a new representation for calculating the moment-rotation curve of the external cover plate joints is proposed using the ultimate bending moment and initial rotation stiffness as two basic parameters. The research reveals that the moment-rotation model proposed in this paper is able to take all loading stages of this joint into account, which facilitates the analysis of yield and ultimate loads. In addition, this model is smooth and continuous at the piecewise points to avoid numerical problems that may be caused in the calculation. Comparing the moment-rotation curves obtained by the calculation model and finite element simulation, the results show good consistency, demonstrating that the moment-rotation model presented in this paper is applicable to the analysis and design of the external cover plate joints.

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“…The type of diaphragm plays a critical role in the force transfer and distribution of bending moment from beam to column components. Extensive experimental studies have been carried out on connections with external diaphragms (Yoshizato et al 1994;Park et al 2005;Li et al 2010;Vulcu et al 2017;andRong et al 2019), internal diaphragms (Cheng andChung 2003;Chou and Jao 2010;and Kang et al 2015), and through diaphragms Cao et al 2018;and Yu et al 2019). Nonetheless, most of the aforementioned studies are only focused on the performance of plane connections and ignore the interaction of bi-directional forces at beam ends that do exist in actual buildings.…”

Section: Introductionmentioning

confidence: 99%

Bi-directional seismic behavior of steel beam-column connections with outer annular stiffener

Bai

Shu-hong

Mou

et al. 2021

Engineering Structures

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Experimental seismic behaviour of bottom-through-diaphragm and top-ring connection to SST columns

Cited by 16 publications

References 18 publications

Optimization of the Mechanical Properties of Bolted Connections between Concrete-Filled Tubular Columns and Steel Beam with Reinforcing Rings

Optimization of the Mechanical Properties of Bolted Connections between Concrete-Filled Tubular Columns and Steel Beam with Reinforcing Rings

Moment-Rotation Model of External Cover Plate Joints Between Steel Beams and Concrete-Filled Square Steel Tubular Columns With Inner I-Shaped CFRP Profile

Bi-directional seismic behavior of steel beam-column connections with outer annular stiffener

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