Flexural stiffness of CFST Warren trusses with consideration of joint deformation
Year: 2025
Type: article
Abstract: This study presents experimental investigations on concrete-filled steel tubular (CFST) Warren trusses, focusing on the stiffness of both the overall truss and its joints. Results indicate that axial force distributions closely match those predicted by an ideal pin-jointed truss model, with joint deformation contributing up to 20 % to the total truss deflection. Analytical models for the axial stiffness of CFST K-joints were developed, explicitly accounting for the effect of infilled concrete under both tensile and compressive brace loading. Joint stiffness equations were derived through finite element analysis and nonlinear regression. These were integrated into a predictive model for the flexural stiffness of CFST Warren trusses. Validation against experimental data showed that the proposed method accurately captures joint effects, with prediction errors within 12 %.
Institutions: Chongqing University, Chang'an University, Fuzhou University
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,310
Awards: G1515890227, G415485656
OpenAlex ID: W4414560731