Research Progress on the Seismic Behavior of Weak-Axis Beam-to-Column Connections of H-Shaped Steel Columns

PengCheng Guo

doi:10.63313/AERpc.9095

Authors

PengCheng Guo Central South University of Forestry and Technology, Changsha, Hunan, China Author

DOI:

https://doi.org/10.63313/AERpc.9095

Keywords:

H-Shaped Steel Column, Weak-Axis Connection, Beam-To-Column Joint, Semi-Rigid Connection, Seismic Behavior, Moment-Rotation Relationship

Abstract

Weak-axis beam-to-column connections of H-shaped steel columns are important force-transferring components in steel frame structures, and their mechanical behavior directly affects structural load-carrying capacity, deformation capacity, and seismic safety. Compared with strong-axis connections, weak-axis connections mainly transfer beam-end moments through the column web and its adjacent region. Owing to the relatively low out-of-plane stiffness of the column web and insufficient restraint of the panel zone, these connections are prone to local deformation, stress concentration, insufficient rotational stiffness, and uncertain plastic development. With the development of prefabricated steel structures and low- to mid-rise steel residential buildings, the seismic behavior of weak-axis connections has attracted increasing attention. This paper reviews existing studies from the aspects of experimental research, finite element analysis, moment-rotation relationship models, and new connection configurations. Previous studies show that end plates, T-shaped connectors, U-shaped connectors, I-shaped plates, column-tree splices, reduced beam sections, and local strengthening measures can improve load-transfer paths, enhance rotational stiffness and energy dissipation capacity, and move plastic deformation away from the column face. However, unified design methods, restoring force models, and prefabricated details still require further investigation.

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