Reference Type:  Journal Article
Record Number: 1
Author: Chen, Y., He, K., Zhang, W. X., Chen , B. C. and Wei, J. G.
Year: 2017
Title: Experimental and numerical investigations on skewed plate-to-shs x-joints under compression
Journal: Advanced Steel Construction
Volume: 14
Issue: 4
Pages: 23
Start Page: 539
Short Title: Experimental and numerical investigations on skewed plate-to-shs x-joints under compression
DOI: 10.18057/IJASC.2018.14.4.2
Keywords: Skewed plate-to-SHS X-joints, compression, static behavior, FEA, ultimate bearing capacity, design equation
Abstract: Experimental and numerical investigations were conducted on skewed plate-to-SHS X-joints under compression. In order to research static behavior of skewed plate-to-SHS X-joints under compression, a total of ten specimens including orthogonal and skewed plate-to-SHS X-joints were tested. The failure modes, compression-displacement curves and strain intensity distribution curves of joints were presented in the paper. The effects of τ (The ratio of plate thickness to SHS chord thickness) and θ (skewed angle between plate and SHS chord axis) on the ultimate bearing capacity and ductility of X-joints were also studied. The corresponding finite element analysis (FEA) was also performed and calibrated against the test results. Therefore, an extensive parametric study was carried out to evaluate the effects of main geometric parameters (τ and θ) on the static behavior of skewed plate-to-SHS X-joints under compression. Results of these tests showed that as value of θ increased, ultimate bearing capacity of X-joints increased irregularly. As value of τ increased, the ultimate bearing capacity of X-joints increased significantly. Maximum strain intensity was located in the region of weld seam end between plate and SHS chord. As value of θ increased, ductility of joints with thin plates increased; ductility of joints with thick plates decreased. Except X-joints with θ=90°, coefficient of ductility of joints with thick plates were larger than that of joints with thin plates. In addition, the design equations were proposed for skewed plate-to-SHS X-joints under compression, which were shown to be accurate and reliable.
Author Address: The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China (100124)