Experimental and FE study on strengthened steel beam-column joints for progressive collapse robustness under column-loss event

Alrubaidi, Mohammed; Abbas, Husain; Elsanadedy, Hussein M.; Almusallam, Tarek; Iqbal, Rizwan A.; Al-Salloum, Yousef

doi:10.1016/j.engstruct.2022.114103

Cited by 18 publications

(13 citation statements)

References 37 publications

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“…To simplify, we assume that the rotations (θ) at both ends of the steel beam are similar. The flexural action resistance (P u,FA ) and CA resistance (P u,CA ) contribute equally to the overall resistance Pu [ 6 , 29 ]. The approximation of these factors may be found through the following: P u,CA = 2 N u,CA sin θ , P u,FA = P u − P u,CA .…”

Section: Resultsmentioning

confidence: 99%

“…An experimental study was completed at King Saud University to examine the progressive collapse resistance of steel beam-column assemblies having two types of simple shear connections under the loss of the middle column [ 6 , 29 ]. The purpose of this study is to compare the ability of strengthened and unstrengthened steel beam–column joints to mitigate progressive collapse should a ground-level column in the external frame be lost in a catastrophic event.…”

Section: Experimental Specimens and Test Setupmentioning

confidence: 99%

“…Previous published research literature on the subject of strengthening steel beam–column connections about mitigating or preventing progressive collapse have been lacking. For steel-framed buildings to improve their structural performance, some researchers, including Alrubaidi, M. et al [ 29 ] (which is related to this work-study), have conducted experimental and numerical testing on two connection strengthening techniques. Even though the schemes generally reduced the risk of progressive collapse in steel frames, the study was limited because only two specimens met the criteria for each parameter.…”

Section: Introductionmentioning

confidence: 99%

“…The scheme does not require very precise construction and fabrication tolerances. The FE models of the three steel assemblies with typical existing simple shear, moment and the strengthened specimen were validated in a previous study by Alrubaidi, M. et al [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation on Progressive Collapse Mitigation of Steel Beam–Column Joint Using Steel Plates

Alrubaidi

Alhammadi

2022

Materials

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This research employed extensive numerical analyses to locate the weak areas and determine the structural issues critical to preventing the spread of collapse. As a result, three specimens were tested using scaled models of strengthened and unstrengthened steel beam–column joint assemblies. The data were utilized to verify numerical models. One simple shear joint from the three experimental assemblies was used as the control specimen (unstrengthened joint). The second was a bolted steel beam–column joint utilized as a reference specimen to reflect the ideal beam–column joint generally employed in intermediate moment-resisting frames in seismic zones worldwide. Similar to the control, the third specimen (strengthened joint) had two side plates welded together to strengthen the connection site. Numerical finite element models were developed using ABAQUS (2020) software to extensively investigate the behavior of steel frame assemblies before and after upgrading. The FEM matrix comprised 17 specimens with varying parameters, including plate thickness, steel grade, a joint between the beam flange-strengthening plates, and a column that was either welded or not welded. The effectiveness of the strengthening techniques was established by comparing the mode of failure and load–displacement characteristics of the investigated specimens. The results indicate that the average increase in peak load due to a change in plate thickness for grades A36 and A572 is approximately 22% and 8%, respectively. Plates made of A572 steel increase peak load by 30%. All strengthened specimens attained catenary action, mitigating the possibility of progressive collapse.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Specimens and Test Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation on Progressive Collapse Mitigation of Steel Beam–Column Joint Using Steel Plates

Alrubaidi

Alhammadi

2022

Materials

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“…The welded connection was applied in the experiment. The connection strengthening studies of simple shear connection has conducted by Alrubaidi et al [57]. The results show that the peak load of the specimen was significantly increased throughout the flexural and catenary action phases after shear connections were strengthened using pre-tensioned high-strength hot-rolled steel bars inside the connection zone.…”

Section: Literature Reviewmentioning

confidence: 99%

Parametric behaviour beam-to-column composite connection using CFS section

2022

IJATEE

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Steel is a series of iron-carbon alloys with welldefined component ratios. [1]. Steel has several advantages over other materials like concrete and wood. The steel quality could be controlled, produced massively, has high strength in tension, high ductility, and very homogenous and uniform material. Steel is divided into cold-formed steel (CFS) and hot-rolled steel (HRS) [2]. CFS has advantages over HRS, such as lightweight, could be formed for unusual sectional configuration, efficient structural application, and is relatively easy to be modified in the field [3]. Due to its lighter weight, the CFS is beneficial in reducing the weight of the building to reduce seismic activity. Connections are an important part of a steel structure, where a proper design and treatment are necessary to make the structure safe and economic [4].

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