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RISS 인기검색어
- 검색키워드
- 저자 : Sisi Lu (검색결과 2 건)
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Shearing Bearing Capacity of Screwed Connections of Thin Steel Sheets
Sisi Chao,Linfeng Lu,Hanheng Wu 한국강구조학회 2019 International Journal of Steel Structures Vol.19 No.2
This paper reviews the design rules of single shear screwed connection of cold-formed steel structure in the current design specifi cations, such as North American, Australian/New Zealand, European, British, Japanese and Chinese, and points the shortcomings of Chinese design specifi cation and the mistakes of some published reports on the shear resistance of single shear screwed connections. A total of 194 single screw overlap sheared connections, which were made of steel sheet manufactured in China and were tested by Chinese scholars since 1993, and the detailed test data are introduced. Using the design specifi cations mentioned above recalculated the normal connection shear strength of the 194 connection specimens, and evaluated the accuracy of six design specifi cations under the diff erent failure modes. The Japanese design manual is too conservative to estimate the bearing capacity of the single shear screwed connection under any failure mode. For tilting or tilting and bearing failure mode, the accuracy of the AISI S100 and AS/NZS 4600 diminishes and sometimes tends to be unsafe; however, the Eurocode 3, BS5950-5 and GB50018 are appropriate. As to screw shear failure mode, the AISI S100, AS/NZS 4600, Eurocode 3 and BS5950-5 are appropriate but GB50018 tends to be unsafe. The paper gives a new design formula as a supplement to GB50018 that can accurately predict the bearing capacity of single shear screwed connection in all failure modes. Finally, the Group Eff ect of multiple-screw shear connection was investigated based on 38 multiple-screw connection specimens.
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Crushing Characteristics on Square Tubes Under Progressive Buckling
Kaibo Yan,Sisi Lu,Pan Wang,Weitao Ni,Zhaowei Chen,Shuen Zhao,Shuguang Yao 한국강구조학회 2023 International Journal of Steel Structures Vol.23 No.1
This paper presented the research on crushing characteristics for progressive bucking square tubes under axial loading using the dimensional analysis method. According to the mechanical properties of mild steel and aluminium alloy, the finite element models of progressive buckling square tubes made up of different materials were established. Then dimensional analysis was developed to obtain the influence of inherent parameters on energy absorption characteristics of progressive buckling square tubes, and a theoretical prediction model was proposed to predict the energy absorption characteristics of progressive buckling square tubes subjected to axial loading. The theoretical prediction results were found to match well with finite element analysis and dynamic test results. Furthermore, the equivalence methods of square tubes made up of different materials and geometric parameters were discussed. The results showed that the equivalence of deformation displacement and equivalence of mean crushing force are better equivalence methods for lightweight design, and keeping a constant length and width to obtain an equivalent thickness for progressive buckling square tubes is a more stable equivalence method.
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