Strength Analysis of Eccentric Rectangular Hollow Section X-Joints Subjected to Axial Compression in the Brace

Document Type

Article

Publication Date

12-1-2024

Abstract

This paper investigates the mechanics behavior of eccentric rectangular hollow section (ERHS) X-joints subjected to axial compression in the brace, based on which analytical formulas are established to predict the strength of the ERHS X-joints. Static testing is conducted on two ERHS X-joint and one RHS X-joint specimens under brace compression, and the corresponding finite element (FE) analysis is performed. It is found that the ultimate strength of the ERHS X-joints with a medium brace/chord width ratio (β) is 39% higher than that of the RHS X-joints. The strength and initial stiffness of the ERHS X-joints increase when β increases. Based on the load transferring mechanism, two analytical models and the corresponding equations are proposed to predict the strength of the ERHS X-joints with β≤0.925 and β=1.0. The proposed models are validated through experimental data and FE results.

Publication Source (Journal or Book title)

Journal of Structural Engineering (United States)

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