Critical collapse deformation of 3-D steel frame with composite floor system

Determination of the CCD (critical collapse deformation) for frame structures is crucial to calculate their final collapse resistance due to a column loss. This paper studies the CCD of 3-D (three-dimensional) steel frame structure in an interior column loss. The work presented in this paper is an e...

Full description

Saved in:
Bibliographic Details
Published in:Journal of constructional steel research 2023-09, Vol.208, p.108034, Article 108034
Main Authors: He, YingHua, Li, GuoQiang, Zhang, JingZhou, Jiang, BinHui, Zhang, Jing
Format: Article
Language:English
Subjects:
Aspect ratio
Collapse deformation
Column-removal
Floor slab
Fracture
Steel frame
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Determination of the CCD (critical collapse deformation) for frame structures is crucial to calculate their final collapse resistance due to a column loss. This paper studies the CCD of 3-D (three-dimensional) steel frame structure in an interior column loss. The work presented in this paper is an extension of previous work by authors on two-dimensional (2-D) steel frame, by further introducing the effects of concrete floor slab. The fracture of steel is considered by Bai-Wierzbicki model, in which the effects of Lode angle and stress triaxiality on fracture of steel are accounted for. The Bai-Wierzbicki model is imported into software ABAQUS by a user-defined subroutine. The CCDs of 2-D steel frame, 3-D steel bare frame, and 3-D steel frame with floor slab due to an interior column loss are compared. The effects of beam span, beam height, slab thickness, and slab aspect ratio on the CCD of 3-D steel frame are studied. For steel frame with different slab span-to-thickness ratios, explicit calculation formulae are established to calculate the CCD of steel frame. It is found that due to the existence of floor slab, the CCD of steel frame is significantly reduced. A larger span-to-depth ratio for steel beam ensures a greater CCD of steel frame. For a certain slab span-to-thickness ratio, the CCD-to-depth ratio of steel beam is almost linear against the span-to-depth ratio of steel beam. Moreover, the CCD of steel frame increases when the slab aspect ratio increases. •CCD of 3-D steel frame with composite floor is quantified.•Effects of beam span, beam height, slab thickness, and slab aspect ratio are studied.•Explicit formula for calculating CCD is established.
ISSN:0143-974X
DOI:10.1016/j.jcsr.2023.108034