Finite Element Study of Seismic Compactness Limits for Tubular Columns in Seismic Frames
Journal
Lecture Notes in Civil Engineering
Journal Volume
519 LNCE
Start Page
200
End Page
210
ISSN
2366-2557
2366-2565
ISBN (of the container)
9783031628832
ISBN
9783031628832
9783031628849
Date Issued
2024
Author(s)
Laura Constain-Montoya
Omar Sediek
Jason McCormick
Chia-Ming Uang
Sherif El-Tawil
DOI
10.1007/978-3-031-62884-9_18
Abstract
Current local seismic compactness limits specified in the American Institute of Steel Construction Seismic Provisions (AISC 341-22) for hollow structural section column members are extrapolated from uniaxial tests of hollow structural sections braces, where the developed plastic hinge is concentrated over a short length at the center of the member. This behavior is very different than the behavior observed in a first story column of a seismic moment frame. To address this difference and explore the behavior of hollow structural section columns in moment frame systems, detailed finite element models of square hollow structural sections are validated to ensure their accuracy under combined large axial loads and cyclic bending moments. These models are then used to explore the influence of different axial load ratios and local slenderness values that cover a range of design parameters for square hollow structural sections. The constant applied axial loads range from 20% to 40% of the column yield strength. The lateral loading protocol is representative of a far-field type earthquake. The performance of these columns is evaluated with regards to maximum moment capacity, moment capacity degradation with continued cycling and rotational capacity. The results will provide a means of developing a rational set of seismic compactness limits for highly ductile hollow structural section columns used in seismic moment frames in the future.
Event(s)
11th International Conference on the Behaviour of Steel Structures in Seismic Areas, STESSA 2024, Salerno, 8 July 2024 through 10 July 2024. Code 315189
Subjects
columns
compactness limits
finite element modeling
hollow structural sections
moment frames
SDGs
Publisher
Springer Nature Switzerland
Type
conference paper