Concrete-Filled Hollow Structural Sections. I: Materials, Cross-Section Classification, and Concentrically Loaded Columns

This paper reviews contemporary rules in CSA S16:19, AISC 360-16 and EN 1994-1-1 for concrete-filled hollow structural sections (HSS), covering materials, cross-section classification, concentrically loaded columns. Results from 453 tests on axially compressed HSS members are compared to predicted strengths using current (CSA 1994-1-1) recommended S16 design equations (with limits of validity), a first-order reliability analysis is performed accordance with S408-11. The recommendations herein shown maintain the S16:19 Clause 18.2 level compression members. Design examples provided, results counterpart American code (AISC 360-16). Part I two-part series. II covers flexural members, beam-columns, tension shear.