Analytical Study of Common Rigid Steel Connections under the Effect of Heat

Rahnavard, Rohola; Siahpolo, Navid; Naghavi, Mohammad Reza; Hassanipour, Akbar

doi:10.1155/2014/692323

Cited by 17 publications

(4 citation statements)

References 7 publications

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“…Li et al [19] studied the mechanical properties of flush end-plate composite joints under the combination of axial loading and elevated temperature conditions. Rahnavard et al [20] studied the behaviors of common types of rigid connections, including connections with an endplate, connections with a bolted cover plate, and bolted T joints, under the effect of heat using numerical FE methods with the ABAQUS software. Fang et al [21] proposed an extended end-plate connection that was formed using shape memory alloy bolts.…”

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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“…In the previous two projects, connection and insulation behaviour was temperature independent and modelled in a linear elastic fashion. However, when a certain façade system is exposed to fire: (a) the mechanical properties of connections like stiffness and strength will change significantly [5,6], and (b) the insulation material may be subject to pyrolysis and other types of degradation. Both aspects should be taken into account during the simulation of structures like façades under fire.…”

Section: Introductionmentioning

confidence: 99%

Multi‐scale bolt connection model for thermomechanical simulations

Xu¹,

Hofmeyer²,

Maljaars³

2021

ce papers

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A multi‐scale simulation approach is proposed to predict the fire resistance of structures comprising connections by bolts, as a supplement to an existing two‐way coupled CFD‐FEM method. In the existing model, fire is modelled by CFD, and its effects on the overall structure are found via thermodynamic and thermomechanical models. In this paper, detailed thermomechanical models are presented to predict the behaviour of a bolt connection, in order to find the equivalent linear elastic stiffness for the bolt connection that is modelled as a spring in the overall structure. Each load step, the stiffness of the spring is determined by the detailed model, which for a certain temperature, boundary conditions, and load type, predicts the connection behaviour, including geometric and material non‐linearity and failure. It will be shown that the detailed model simulates existing experiments for elevated temperatures well, and is able to predict all possible failure modes as listed in the Eurocode for ambient temperatures. It is then demonstrated that the model can also be used for all these failure modes for elevated temperatures. In the near future, a strategy will be developed to include the detailed models in the overall structure, within the two‐way coupled CFD‐FEM method.

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“…However, some experimental investigations indicated that field-welding quality is difficult to control in key parts of the connection, and unexpected brittle failure has often been observed between the weld metal and base metal at the toe of the weld access holes [8,9]. erefore, to improve the assemblability of SRC shear walls with steel boundary elements and steel coupling beams, referring to the advantages of modular prefabricated multistory steel structures [10][11][12][13][14][15][16][17], an innovative modular prefabricated HCW system is presented in this study. is modular prefabricated HCW system is composed of two SRC walls with steel boundary elements coupled using a full-bolt-connected modular steel coupling beam, and the modules can be assembled rapidly without being welded on site.…”

Section: Introductionmentioning

confidence: 99%

Coupling Ratio‐Based Design and Seismic Performance of Modular Prefabricated Hybrid Coupled Walls

Shi

Jian-bo

Weng

2019

Advances in Civil Engineering

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Based on the advantages of modular prefabricated multistory steel structure, a full-bolt-connected modular steel coupling beam-hybrid coupled wall system is presented. Further, a method of estimating the coupling ratio (CR) is proposed according to the continuous link method. A CR-based seismic design procedure is determined such that the structure utilizes the lateral stiffness of the shear wall, which is necessary to avoid structural damage under frequently occurring earthquakes. However, it also exhibits excellent ductility of the coupling beams, which is necessary for dissipating energy under infrequent earthquakes. Subsequently, nonlinear hysteretic analyses are conducted from finite element analysis software ABAQUS, and a parametric study based on the finite element technique is performed to identify the optimal value of the coupling ratio. Results indicate that the seismic performance of modular prefabricated HCWs was excellent, and the basic requirements for ductile behavior and lateral stiffness were satisfied for CR values from 50% to 60%. The obtained results confirm the accuracy of the CR-based seismic design method proposed in this study and are supported by the selection of the design parameter at the initial design stage.

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Analytical Study of Common Rigid Steel Connections under the Effect of Heat

Cited by 17 publications

References 7 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

Multi‐scale bolt connection model for thermomechanical simulations

Coupling Ratio‐Based Design and Seismic Performance of Modular Prefabricated Hybrid Coupled Walls

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