| Title |
Tensile Design Equation for Enhancing Deformability of Cold-Formed HSS Bracing Members |
| Authors |
Han Sang-Whan ; Kim Wook-Tae ; Ryu Ho-Won |
| Keywords |
Deformability ; Width-thickness Ratio ; Energy Dissipation Capacity ; Tensile Design Equation |
| Abstract |
The purpose of this study is to propose a tensile design equation for cold-formed Hollow Structural Section(HSS) bracing members for improving the deformability of the members. Improvement can be achieved by preventing early fracture at the slotted end connection region in bracing members particularly having a small width-thickness ratio(w/t ratio).For this purpose, experimental tests of bracing members were carried out using quasi static reversed cyclic loading with a symmetric shape in compression and tension. Eight full-scale test specimens were made, which were designed and detailed according to AISC LRFD Manual(2001). In the test, the specimen having a smallest w/t ratio had poor deformable capacity than other specimens. This behavior is contrast to the expectation that the bracing member having smaller w/t ratio has a larger deformable capacity. This is caused by the variability of material strength in cold-formed HSS and the tensile design equation of the bracing member in current design provision as well as the loading history used in this study. In order to improve deformability of HSS bracing members, this study proposed a tensile design equation. |