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Hysteretic behavior comparison of austenitic and lean duplex stainless steel square hollow section members under cyclic axial loading
Highlight Hysteretic behaviors of square hollow section members for seismic bracing system was investigated. Cyclic axial loading tests were conducted. Structural behavior comparison according to the material property difference of stainless steel was made. Energy dissipation capacity and energy index was compared. Buckling strengths between test and current design specifications were compared.
Abstract In this study, cyclic loading tests for a total of 10 specimens were performed in order to study the cyclic response of square hollow section bracing members with three types of cold-formed stainless steel materials; two austenitic stainless steels and one lean duplex stainless steel. The buckling behaviors, tensile strength, and energy dissipation capacity of the specimens were investigated according to the difference of material properties, width-thickness ratio and slenderness ratio. This study indicated that the number of cycles for grade 304 stainless steel tubular specimens at ultimate state was lower than that of grade 316 stainless steel specimens due to tensile fracture in the weld heat-affected zone. The ultimate strength and energy dissipation capacity of the lean duplex stainless steel specimens was also lower than those of austenitic stainless steel specimens due to initial local buckling. It is found that the grade 316 specimens showed the higher energy dissipation capacity and energy index by 1.78, 2.72 times on average, respectively, compared to the grade 304 members despite their higher material strength. This study also showed that European code tended to underestimate the compressive buckling strength of the bracing members, while Specification for the Design of Cold-formed Stainless Steel Structural Members by American Society of Civil Engineers provided unconservative the buckling strength prediction in the long columns and duplex stainless steel members.
Hysteretic behavior comparison of austenitic and lean duplex stainless steel square hollow section members under cyclic axial loading
Highlight Hysteretic behaviors of square hollow section members for seismic bracing system was investigated. Cyclic axial loading tests were conducted. Structural behavior comparison according to the material property difference of stainless steel was made. Energy dissipation capacity and energy index was compared. Buckling strengths between test and current design specifications were compared.
Abstract In this study, cyclic loading tests for a total of 10 specimens were performed in order to study the cyclic response of square hollow section bracing members with three types of cold-formed stainless steel materials; two austenitic stainless steels and one lean duplex stainless steel. The buckling behaviors, tensile strength, and energy dissipation capacity of the specimens were investigated according to the difference of material properties, width-thickness ratio and slenderness ratio. This study indicated that the number of cycles for grade 304 stainless steel tubular specimens at ultimate state was lower than that of grade 316 stainless steel specimens due to tensile fracture in the weld heat-affected zone. The ultimate strength and energy dissipation capacity of the lean duplex stainless steel specimens was also lower than those of austenitic stainless steel specimens due to initial local buckling. It is found that the grade 316 specimens showed the higher energy dissipation capacity and energy index by 1.78, 2.72 times on average, respectively, compared to the grade 304 members despite their higher material strength. This study also showed that European code tended to underestimate the compressive buckling strength of the bracing members, while Specification for the Design of Cold-formed Stainless Steel Structural Members by American Society of Civil Engineers provided unconservative the buckling strength prediction in the long columns and duplex stainless steel members.
Hysteretic behavior comparison of austenitic and lean duplex stainless steel square hollow section members under cyclic axial loading
Kim, RiHa (author) / Kim, TaeSoo (author) / Im, SeHyeok (author) / Xi, Yunping (author)
Engineering Structures ; 237
2021-03-07
Article (Journal)
Electronic Resource
English
Buckling of stainless steel square hollow section compression members
| Elsevier | 2002
Buckling of stainless steel square hollow section compression members
| Online Contents | 2003