Journal:Structures

Abstract:This paper proposes an economical and practical corrosion-resistant joint, which is composed of CFBT columns and SSBRC beams connected by external diaphragms. Eight interior joint specimens were tested under constant axial compression and reversed cyclic loading. The test parameters included the axial compressive load levels (n = 0.2 and 0.4), the height of the SSBRC beam (h = 300 mm and 350 mm) and the ratio of the flexural bearing capacity of the SSBRC beam to CFBT column (km = 0.62–1.05). Systematic analyses were conducted on the failure modes, hysteretic responses, deformation capacity, rigidity/strength degradation and energy dissipation, complemented by a decomposition of the column top lateral displacement. Experimental results indicate that the failure mode (beam failure, panel zone failure, or column failure) is predominantly governed by n and km. Within the tested parameter range, the displacement ductility coefficients of the specimens range from 2.64 to 3.34, and the equivalent viscous damping ratios at peak load vary between 0.242 and 0.372. A simplified calculation method for the horizontal bearing capacity of CFBT column to SSBRC beam joints is established, together with a fitted formula for the nominal yield strength of stainless steel bars.

Indexed by:Journal paper

Page Number:2026,94:113355

Translation or Not:no

Included Journals:SCI

First Author:张世江

Co-author:杨志欣,谢红磊,姜航

Correspondence Author:叶勇