1 Experimental and numerical studies of ferritic stainless steel tubular cross- 1 sections under combined compression and bending 2 Ou Zhao 1 , Barbara Rossi 2 , Leroy Gardner 3 , Ben Young 4 3 4 5 Abstract: An experimental and numerical study of ferritic stainless steel tubular cross- 6 sections under combined loading is presented in this paper. Two square hollow section (SHS) 7 sizes – SHS 40×40×2 and SHS 50×50×2 made of grade EN 1.4509 (AISI 441) stainless steel 8 were considered in the experimental program, which included two concentrically-loaded stub 9 column tests, two four-point bending tests and fourteen eccentrically-loaded stub column 10 tests. In parallel with the experimental investigation, a finite element (FE) study was also 11 conducted. Following validation of the FE models against the test results, parametric analyses 12 were carried out to generate further structural performance data. The experimental and 13 numerical results were analyzed and compared with the design strengths predicted by the 14 current European stainless steel design code EN 1993-1-4 and American stainless steel design 15 specification SEI/ASCE-8. The comparisons revealed that the codified capacity predictions 16 for ferritic stainless steel cross-sections under combined loading are unduly conservative. The 17 deformation-based Continuous Strength Method (CSM) has been extended to cover the case 18 of combined loading. The applicability of CSM to the design of ferritic stainless steel cross- 19 sections under combined loading was also evaluated; The CSM was shown to offer 20 1 PhD Candidate, Dept. of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, UK. (Corresponding author). Email: ou.zhao11@imperial.ac.uk. 2 Professor of Structural Engineering, Dept. of Civil Engineering, KU Leuven, Belgium. Email: barbara.rossi@kuleuven.be 3 Professor of Structural Engineering, Dept. of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, UK. Email: leroy.gardner@imperial.ac.uk 4 Professor of Structural Engineering, Dept. of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China. Email: young@hku.hk Zhao, O., Rossi, B., Gardner, L., & Young, B. (2016). Experimental and Numerical Studies of Ferritic Stainless Steel Tubular Cross Sections under Combined Compression and Bending. Journal of Structural Engineering (ASCE), 142(2), 04015110.