Progressive collapse resistance of steel frame with beam to column transfer structure under a middle column-removal scenario. (May 2023)

• Record Type: Journal Article
• Authors: Huang, Xinheng; Elchalakani, Mohamed; Yu, Peng; Lin, Rui; Nie, Yongchao; He, Sheng
• Is Part Of: Structures. Volume 51(2023)
• Page Start: 1
• Page End: 12
• Publication Date: 2023-05
• Subjects: Progressive collapse -- Load resistance -- Span to depth ratio -- Axial compression ratio -- Beam to column transfer structure; Structural engineering -- Periodicals; 624.1
• DOI: 10.1016/j.istruc.2023.03.041
• Languages: English
• ISSNs: 2352-0124

Abstract

Highlights: The progressive collapse resistance of a steel sub-structure with beam to column transfer structure under a middle column-removal scenario is examined through numerical analysis. The effect of the span to depth ratio and axial compression ratio of the beam to column transfer structure are investigated through parametric study. The causations of different failure modes are discussed based on the parametric study. Advice for the design of the span to depth ratio and axial compression ratio of the beam to column transfer structure is proposed. Abstract: The application of B eam to C olumn T ransfer S tructure (BCTS) in practical engineering is more frequent to satisfy the requirement of space and economy of modern structure. However, the structure is unavoidable to increase the burden of the column in the lower floor, which will enlarge the risk of the structure subjected to progressive collapse. Hence, in order to explore the performance of the steel frame with BCTS on anti-progressive collapse, a numerical model is established by using Abaqus and it is validated by the test result. Based on that, a parametric analysis is carried out to discuss the effects of the S pan to D epth R atio (SDR) of the beams, and the A xial C ompression R atio (ACR) of the BCTS. The result indicates that the model with larger ACR leads to smaller load bearing capacity and U ltimate D eformation C apacity (UDC). Meanwhile, the model with larger SDR leads to smaller load bearing capacity but larger UDC. Moreover, it is found that it is inadvisable for unduly increasing the SDR to improve the contribution of the C atenary A ction (CA) but decrease the contribution of the F lexural A ction (FA). In addition, the better performances on progressive collapse can be observed as long as the models with the ACR is not greater than 0.06 in the RDS range from 11 to 19. Thus, the ACR of 0.06 is recommended as the limited value in structure design.