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Steel and Composite Structures Volume 41, Number 4, November25 2021 , pages 581-594 DOI: https://doi.org/10.12989/scs.2021.41.4.581 |
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Experimental and numerical studies of miniature bar-typed structural fuses with Teflon pads |
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Sen Yang, Yan Liu, Yu Lin, Dongzhi Guan, Hanbin Ge, Zhengxing Guo and Wenguang Liu
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| Abstract | ||
| Many studies have proved that structural fuses could improve the seismic performance of structures efficiently. A structural fuse named the miniature bar-typed structural fuse (MBSF) has been proposed and investigated by the authors, which consists of a central core bar, a confining tube. To further improve the mechanic performances of the MBSFs under compressive loadings, Teflon pads are introduced to adjust the contact and friction status between the core bar and the confining tube. Three groups of specimens were discussed including the specimen with a single cutting line (SC), the specimen with double cutting lines (DC), and the specimen with triple cutting lines (TC). The results show that the hysteretic performances of the fuses are improved with the help of Teflon pads. The compression strength adjustment factor declines when Teflon pads are appended. Numerical and theoretical analyses are also conducted which expounded the effect of the Teflon pads. Different plastic buckling deformation principles of the core bars are compared by the theoretical analysis. It is shown that Shanley's theory fits the numerical results well, which is recommended for the theoretical calculation of the proposed MBSFs. | ||
| Key Words | ||
| cyclic loading; frictional effect; structural fuse; steel; Teflon pads | ||
| Address | ||
| Sen Yang and Wenguang Liu: School of Civil Engineering, Shanghai University, Shanghai 200444, People's Republic of China Yan Liu and Hanbin Ge: Department of Civil Engineering, Meijo University, Nagoya 468-8502, Japan Yu Lin: College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu Province, People's Republic of China Zhengxing Guo: School of Civil Engineering, Southeast University, Nanjing 210096, Jiangsu Province, People's Republic of China | ||