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