Analytical database on noncompact and slender CFT members

<p>This analytical database presents the results from comprehensive parametric studies conducted using benchmarked finite element method (FEM) models developed by the author (Lai, 2014). These parametric studies are conducted to investigate the effect of tube slenderness ratio (b/t or D/t), material strength ratio (Fy/f’c), axial load ratio (P/Pn) and member length-to-depth ratio (L/B or L/D) on the behavior of noncompact and slender rectangular and circular CFT beam-columns. Updated P-M interaction equations were developed using results from these parametric studies, as discussed in detail by Lai (2014). The updated P-M interaction equations were verified by using them to calculate the P-M interaction curves of 197 beam-columns included in the database.The resulting comparisons of the updated interaction curves (with solid lines) obtained using these equations with interaction curves (with dashed lines) from the parametric studies are included in this database. In the research by Lai (2014), effective stress-strain curves were developed for the steel tube and concrete infill for noncompact and slender CFT members. The validation of these curves are also included in this database. This analytical database also presents the results from comprehensive parametric studies conducted using  benchmarked finite element method (FEM) models developed by the author (Lai, 2014). These parametric studies are conducted to develop effective stress-strain curve for the steel tube and concrete infill for noncompact and slender CFT members. The parameters evaluated in these studies include the effect of tube slenderness ratio (b/t or D/t), steel yield strength (Fy), and concrete compressive strength (f'c). The developed stress-strain curves were discussed in detail by Lai (2014).</p>