A novel device to improve robustness of end plate beam-column connections

Shaheen, Mohamed A.; Foster, A.S.J.; Cunningham, Lee S.

doi:10.1016/j.istruc.2020.10.055

Cited by 19 publications

(8 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, only the sleeve with the positive Gaussian curvature is considered in this study. The basic concept of the proposed method has been previously validated by the authors [18]. The previous analysis concluded that the proposed sleeve significantly improves the rotational capacity of connections, required for the survival of the beam to avoid progressive collapse, without changing the initial stiffness of the standard configuration of the connection.…”

Section: Introductionmentioning

confidence: 94%

“…A detailed description of the FE model has been given in a previous paper by the authors [18], however the key details, along with model validation studies, will be described herein. A numerical model of the connection shown in Figure 3a is developed using ABAQUS/Standard version 6.2 [20].…”

Section: Fe Modelmentioning

confidence: 99%

“…The previous analysis concluded that the proposed sleeve significantly improves the rotational capacity of connections, required for the survival of the beam to avoid progressive collapse, without changing the initial stiffness of the standard configuration of the connection. However, the main aim of the previous investigation [18] was to prove the concept of the sleeve device while considering limited connection parameters and limited failure modes. In the present study, extensive analysis of the sleeve device, including different failure modes and various connection parameters, is considered.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

New Technique to Improve the Ductility of Steel Beam to Column Bolted Connections: A Numerical Investigation

et al. 2021

Self Cite

View full text Add to dashboard Cite

A novel method to improve the robustness of steel end plate connections is presented in this paper. Existing commonly adopted techniques alter the stiffness of the beam or the end plate to improve the connection’s robustness. In this study, the robustness is enhanced by improving the contribution of the bolts to the rotational capacity of connections; the higher the bolts’ elongation, the higher the rotational capacity that can be achieved. However, the brittleness of the bolt material, combined with its small length, results in negligible elongation. Alternatively, the load path between the end plate and the bolts can be interrupted with a ductile element to achieve the required elongation. This can be achieved by inserting a steel sleeve with a designated length, thickness, and wall curvature between the end plate and the washer. The proposed sleeve should be designed so that its ultimate capacity is less than the force in the bolt at failure; accordingly, the sleeve develops a severe bending deformation before the failure of any connection components. Using a validated finite element model, end plate connections with various parameters are numerically investigated to understand the performance of the sleeve device. The proposed system substantially enhances the rotational capacity of the connections, ranging between 1.37 and 2.46 times that of the standard connection. It is also concluded that the sleeved connections exhibit a consistent elastic response with the standard connections, indicating the proposed system is compatible with codified elastic design approaches without modification. Furthermore, for a specific connection, various ductile responses can be achieved without altering the connection capacity nor configuration.

show abstract

Section: Introductionmentioning

confidence: 94%

Section: Fe Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New Technique to Improve the Ductility of Steel Beam to Column Bolted Connections: A Numerical Investigation

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Furthermore, the sleeve can be considered as a useful energy dissipation device due to the plastic deformation that it experiences under the applied load. Shaheen et al [28][29][30][31] conducted numerical and analytical investigations to prove the concept of the proposed sleeve method with end-plate connections under monotonic and cyclic loading. The previous analyses concluded that the proposed system substantially enhances the rotational capacity of connections, which is imperative for progressive collapse avoidance, without degrading either the initial stiffness of the standard configuration or the load-bearing capacity.…”

Section: System Descriptionmentioning

confidence: 99%

“…Recently, the present authors developed a new technique to increase the resilience of end plate connections by enhancing the contribution of the bolts to the rotation capacity [28][29][30][31]. A steel sleeve is inserted between the end plate and the washer interrupting the load path and promoting a ductile response by the plastic deformation of the sleeve.…”

Section: Introductionmentioning

confidence: 99%

Enhancing progressive collapse resistance of steel structures using a new bolt sleeve device

Shaheen

Atar

Cunningham

2023

Journal of Constructional Steel Research

Self Cite

View full text Add to dashboard Cite

A Novel Method to Improve Robustness of End Plate Connections at Elevated Temperatures Using Bolt Sleeves

2023

View full text Add to dashboard Cite

The robustness of steel frames during fire events is primarily controlled by the rotational capacity of beam to column connections. Higher values of rotational capacity allow the beam to develop catenary action which enhances the survivability of the steel frame. The present study proposes a novel device to increase rotational capacity of steel end plate beam-column connections at elevated temperatures. By inserting a steel sleeve with a designated length, thickness and wall curvature between the end plate and the washer, the load path between the end plate and the bolts can be interrupted, promoting a more ductile response. An analytical solution predicting the sleeve design parameters is also presented. It is concluded that the proposed device can significantly increase the rotational capacity of the end plate connection at elevated temperatures. Furthermore, a detailed numerical investigation on end plate connections with various failure modes concluded that the proposed sleeve device does not have any negative effect on the connection performance at elevated temperatures.

show abstract

A novel device to improve robustness of end plate beam-column connections

Cited by 19 publications

References 11 publications

New Technique to Improve the Ductility of Steel Beam to Column Bolted Connections: A Numerical Investigation

New Technique to Improve the Ductility of Steel Beam to Column Bolted Connections: A Numerical Investigation

Enhancing progressive collapse resistance of steel structures using a new bolt sleeve device

A Novel Method to Improve Robustness of End Plate Connections at Elevated Temperatures Using Bolt Sleeves

Contact Info

Product

Resources

About