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Fire-Resistance Design Method for Stainless Steel Tubular X-Joints
| 题名： | Fire-Resistance Design Method for Stainless Steel Tubular X-Joints |
| 正文语种： | eng |
| 作者： | Ding, Runmin;Fan, Shenggang;Jia, Lianlian;Zhou, Hang |
| 作者单位： | Southeast Univ Sch Civil Engn Jiulonghu Campus Nanjing 211189 Peoples R China;Southeast Univ Sch Civil Engn Minist Educ Key Lab Concrete & Prestressed Concrete Struct Jiulonghu Campus Nanjing 211189 Peoples R China;Yango Grp Co Ltd Caojin Rd 99 Chengdu 610095 Peoples R China;Southeast Univ Sch Civil Engn Jiulonghu Campus Nanjing 211189 Peoples R China |
| 关键词： | Fire;Stainless steel;Tubular X-joint;Yield line model;Failure temperature;Chord preload |
| 摘要： | An experimental study was carried out on the fire-resistant performance of six stainless steel tubular X-joints. The failure process and behavioral responses of all specimens were determined, and the failure criteria of stainless steel tubular X-joints at elevated temperatures was developed. Numerical simulation was performed of the stainless steel tubular X-joints subjected to fire, and the accuracy of the model was verified by comparison with the experimental results. By referring to the yield line model in the existing specifications, a yield line model that simultaneously considers the deformation of the chord flange and web was established for stainless steel tubular X-joints. Through theoretical derivation and fitting, the prediction formula of failure temperature for stainless steel tubular X-joints without considering the effect of chord preload was obtained and then modified with the finite-element results. The adverse effect of chord preload on the failure temperature of tubular X-joint was explored using parametric analysis, and the expression of the reduction factor of failure temperature for stainless steel tubular X-joints under chord preload was obtained. A fire-resistance design method for stainless steel tubular X-joints under chord preload is proposed. |
| 出版年： | 2022 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 148 |
| 期： | 1 |
| 页码： | 04021237.1-04021237.13 |
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