Comparison between Traditional CFST T-joint with PBL and CFDSST-to-SHS T-Joint
Volume Title: ICASGE2025
Paper ID : 1011-ICASGE-FULL (R1)
Authors
1School of Architecture and Civil Engineering, Xihua University, chengdu , China
2School of Architecture and Civil Engineering, Xihua University
3School of Architecture and Civil Engineering, Xihua University,chengdu, China
Abstract
Concrete-filled steel tubular (CFST) members are widely used in structural engineering due to their benefits such as ease of construction and optimal material strength utilization. CFST members are commonly applied in truss beams and columns,bridge engineering, and high buildings.These structures feature numerous CFST joints, essential for load transmission and stiffness in truss constructions. The T-joint is the fundamental form of these joints, and traditional CFST T-joints have been studied extensively, the performance of concrete-filled dual steel stiffened tubular (CFDSST) chord-to-square hollow section (SHS) brace T-joints remains unexplored. Consequently, this paper investigates the performances of CFDSST-to-SHS T-joint under axial compressive loading, and make a comparison between traditional concrete-filled steel tube (CFST) T-joint with PBL stiffeners and the CFDSST-to-SHS T-joint. Finite element (FE) models of both types T-joints were developed and validated against available test data. Then the comparison was conducted. A method based on the limit balance theory was used to calculate the bearing capacities of these two T-joints, and the results were compared and analysed
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