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学者姓名：余鑫
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Abstract ：
To meet the critical construction challenges in mountainous and offshore areas, a novel concrete-filled sleeveconnected stainless steel tubular column (sleeve-connected CFSST) is developed by manufacturing the stainless steel tubes in controlled length for convenient transport and assembling on-site with sleeve connection. The spliced steel tubes can further act as formwork to fill on-site mixing concrete for efficient composite action. In this study, the failure modes, load-carrying capacity and ductility of sleeve-connected CFSST columns under axial compressive loading are experimentally investigated with different spliced types. The test results indicates that the outer sleeve can provide additional confinement, leading to strength and ductility enhancement in sleeveconnected CFSSTs. Then finite element (FE) model is validated by the test data, the load-transfer mechanism and confinement effect in typical spliced CFSST columns are systematically analysed by the verified FE model, demonstrating that the existence of core concrete has positive effect on spliced steel tube in transferring axial load and providing additional confinement. Furthermore, the existing design codes give conservative predictions in load-carrying capacity of sleeve-connected CFSSTs. Based on parameter analysis, current predicted methods in cooperation with suggested influenced factor is proposed for compression capacity prediction. Meanwhile, several design recommendations are also delivered within a limited scope.
Keyword ：
Column-column connection Column-column connection Concrete-filled stainless steel tubes (CFSST) Concrete-filled stainless steel tubes (CFSST) Finite element analysis Finite element analysis Outer sleeve Outer sleeve Swage-locking pin Swage-locking pin
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| GB/T 7714 | Yu, Xin , Wang, Tao , Chen, Xian-Gui et al. Performance and design of concrete-filled sleeve-connected stainless steel tubular stub column under axial compression [J]. | ENGINEERING STRUCTURES , 2025 , 328 . |
| MLA | Yu, Xin et al. "Performance and design of concrete-filled sleeve-connected stainless steel tubular stub column under axial compression" . | ENGINEERING STRUCTURES 328 (2025) . |
| APA | Yu, Xin , Wang, Tao , Chen, Xian-Gui , Tan, Ee Loon , Wang, Zhi-Bin , Yu, Tao . Performance and design of concrete-filled sleeve-connected stainless steel tubular stub column under axial compression . | ENGINEERING STRUCTURES , 2025 , 328 . |
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Abstract ：
奥氏体不锈钢S35657因高强度与低合金成本的特点而更适合用作结构钢,但其应用于钢管混凝土柱的研究有待深入.为了研究S35657不锈钢管混凝土柱压弯性能,以截面类型(圆形、方形)、长细比(22、26、43、50)及偏心距(0、40、60 mm)为主要参数,完成16根钢管混凝土柱压弯试验.结果表明:S35657不锈钢管混凝土柱的破坏模态与传统Q355碳钢柱类似,但压弯承载力较碳钢管混凝土柱提高约12％,且压弯承载力均随偏心距与长细比的增加而降低;目前既有规范(规程)对该类柱压弯承载力预测结果偏于保守.建立有限元分析模型并基于试验结果验证其适用性,继而通过验证的模型展开参数分析考察混凝土强度、含钢率和长细比对S35657不锈钢管混凝土柱承载力的影响,分析结果表明:构件稳定系数随着长细比与含钢率的增大而减小,混凝土强度对其影响不大;长细比、含钢率以及混凝土强度对相对轴力-相对弯矩相关曲线影响较大.基于参数分析结果,修正了T/CECS 952-2021《不锈钢管混凝土结构技术规程》中所推荐压弯承载力的计算方法,修正后的简化计算方法对压弯承载力的预测精度提高了约25％.
Keyword ：
S35657奥氏体不锈钢 S35657奥氏体不锈钢 压弯性能 压弯性能 压弯承载力简化计算 压弯承载力简化计算 钢管混凝土柱 钢管混凝土柱 静力试验 静力试验
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| GB/T 7714 | 余鑫 , 王涛 , 王志滨 et al. S35657不锈钢管混凝土柱压弯性能研究 [J]. | 建筑结构学报 , 2025 , 46 (3) : 204-216,230 . |
| MLA | 余鑫 et al. "S35657不锈钢管混凝土柱压弯性能研究" . | 建筑结构学报 46 . 3 (2025) : 204-216,230 . |
| APA | 余鑫 , 王涛 , 王志滨 , 张祖宽 . S35657不锈钢管混凝土柱压弯性能研究 . | 建筑结构学报 , 2025 , 46 (3) , 204-216,230 . |
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Abstract ：
Stainless steel exhibits several advantages as structural material, however its applications are limited due to the high cost. A novel stainless steel, S35657, which replaced the valuable nickel element with cheap nitrogen, was designed to make its use more economical. This study aims to clarify the potential structural application of the novel stainless steel. Tensile tests were firstly conducted to investigate the effect of steel rolling direction, cold- forming enhancement and welding on the behaviour of grade S35657, with comparisons made to commonly used stainless steel S30408 and mild steel Q355. The test results revealed that S35657 grade exhibited higher strength compared to stainless steel S30408, attributed to the added nitrogen element. The post-fire behaviour of S35657 up to 1200 degrees C under unloaded conditions was tested, alongside its post-cold-forming behaviour. This thermomechanical property characterisation indicated no significant strength deterioration until the exposed temperature exceeded 800 degrees C, although the benefits of cold-forming diminished above 500 degrees C. Based on the test results, the existing stress-strain model was modified to accurately represent the pre- and post-fire stress-strain response for grade S35657. Finally, 1269 test data of S35657 stainless steel were collected and statistically analysed. The partial resistance factor of grade S35657 was determined as 1.15 when the standard value of nominal yield strength was selected as 381.9 MPa.
Keyword ：
Cold-forming Cold-forming Mechanical property Mechanical property Post-fire Post-fire Reliability analysis Reliability analysis Stainless steel Stainless steel Stress-strain model Stress-strain model
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| GB/T 7714 | Yu, Xin , Zhu, Bo-Yan , Bu, Yidu et al. Post-fire and cold-formed properties of a novel high nitrogen stainless steel S35657 [J]. | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2025 , 227 . |
| MLA | Yu, Xin et al. "Post-fire and cold-formed properties of a novel high nitrogen stainless steel S35657" . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 227 (2025) . |
| APA | Yu, Xin , Zhu, Bo-Yan , Bu, Yidu , Zhang, Xiao-Dong , Shi, Li-Ming . Post-fire and cold-formed properties of a novel high nitrogen stainless steel S35657 . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2025 , 227 . |
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Owing to their exceptional durability, reinforced sea-sand concrete-filled (square) stainless steel tubular (RSCFSST) columns present a viable structural solution for coastal regions. Axial compressive tests were conducted on eight square RSCFSST short columns and two sea-sand concrete-filled (square) stainless steel tubular counterparts. The experimental results demonstrated that the incorporation of stainless steel rebars increased their axial compressive resistance, peak strain, and ductility by 4-13 %, 21-52 %, and 25-122 %, respectively. Notably, RSCFSST column filled with sea-sand concrete exhibited comparable axial compressive behavior to those columns utilizing normal concrete. A finite element model was developed to conduct the mechanism and parametric analyses. The mechanism analysis revealed that stainless steel outperformed carbon steel in improving both the peak strain and ductility of the composite columns. Parametric analysis indicated that increasing the concrete strength, 0.2 % proof strength of the steel tube, 0.2 % proof strength of stirrups, steel tubular ratio, or stirrup ratio significantly enhanced the axial compressive resistance of the RSCFSST columns. Finally, novel predictive methods were developed for estimating their axial compressive resistances and peak strains, demonstrating superior accuracy in predictions.
Keyword ：
Axial compressive resistance Axial compressive resistance Ductility Ductility Finite element Finite element Reinforced concrete-filled stainless steel tube Reinforced concrete-filled stainless steel tube Sea-sand concrete Sea-sand concrete Stainless steel stirrup Stainless steel stirrup
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| GB/T 7714 | Wang, Zhi-Bin , Tong, Jing-Dong , Zhao, Chun-Guang et al. Axial compressive performance of reinforced sea-sand concrete-filled square stainless steel tubular stub columns [J]. | ENGINEERING STRUCTURES , 2025 , 334 . |
| MLA | Wang, Zhi-Bin et al. "Axial compressive performance of reinforced sea-sand concrete-filled square stainless steel tubular stub columns" . | ENGINEERING STRUCTURES 334 (2025) . |
| APA | Wang, Zhi-Bin , Tong, Jing-Dong , Zhao, Chun-Guang , Tan, Ee Loon , Yu, Xin , Lin, Ji-Ting . Axial compressive performance of reinforced sea-sand concrete-filled square stainless steel tubular stub columns . | ENGINEERING STRUCTURES , 2025 , 334 . |
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Abstract ：
This paper proposes a novel stainless -steel tube locally strengthened by a concrete -filled steel tube to resist impact loads. A drop hammer impact test system was used to determine the failure modes, impact forces, and displacement responses of the strengthened tubes under an impact load. The effects of the strengthening length and thickness of the concrete and outer steel tubes on the impact responses of the strengthened tubes were investigated. The impact resistance was found to improve with an increase in the thickness of the concrete and outer steel thickness. The test results also indicated that the strengthened tubes exhibited a flexural failure mode with a combination of local and global deformations. An analytical model for predicting the dynamic responses of the locally strengthened tubes was established based on an equivalent two -degree -of -freedom (TDOF) model. The analytically predicted results were compared with the experimental results, and the good consistency between these two results demonstrated the accuracy of the established analytical model.
Keyword ：
Analytical model Analytical model Concrete -filled steel tube Concrete -filled steel tube Impact test Impact test Stainless steel tube Stainless steel tube
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| GB/T 7714 | Zhang, Tianhao , Wang, Yonghui , Zhai, Ximei et al. Impact response of stainless steel tube locally-strengthened by concrete-filled steel tube [J]. | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2024 , 186 . |
| MLA | Zhang, Tianhao et al. "Impact response of stainless steel tube locally-strengthened by concrete-filled steel tube" . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 186 (2024) . |
| APA | Zhang, Tianhao , Wang, Yonghui , Zhai, Ximei , Zhi, Xudong , Zhou, Hongyuan , Yu, Xin . Impact response of stainless steel tube locally-strengthened by concrete-filled steel tube . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2024 , 186 . |
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进行了6个不锈钢管混凝土试件的纯弯试验研究，分析了在弯曲荷载作用下，混凝土类型和截面形状对新型S35657奥氏体不锈钢管混凝土构件的破坏模态、荷载-变形关系、抗弯刚度与承载力的影响规律。试验结果表明：固废混凝土对新型不锈钢管混凝土纯弯构件的整体破坏模态影响不大，但固废混凝土有利于提高构件的抗弯承载力与刚度。随后建立了不锈钢管固废混凝土纯弯构件有限元模型并验证了既有材料模型的适用性，最后分析了各规范抗弯承载力计算方法的适用性和预测精度。
Keyword ：
S35657奥氏体不锈钢 S35657奥氏体不锈钢 固废混凝土 固废混凝土 有限元分析 有限元分析 纯弯 纯弯 钢管混凝土 钢管混凝土
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| GB/T 7714 | 余鑫 , 欧阳帆 , 张祖宽 et al. 新型不锈钢管固废混凝土构件受弯性能研究 [J]. | 建筑钢结构进展 , 2024 , 26 (03) : 62-69 . |
| MLA | 余鑫 et al. "新型不锈钢管固废混凝土构件受弯性能研究" . | 建筑钢结构进展 26 . 03 (2024) : 62-69 . |
| APA | 余鑫 , 欧阳帆 , 张祖宽 , 王志滨 . 新型不锈钢管固废混凝土构件受弯性能研究 . | 建筑钢结构进展 , 2024 , 26 (03) , 62-69 . |
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A total of 6 concrete-filled new S35657 austenitic stainless steel tubular（CFSST）beams were prepared for pure bending test，to evaluate the influence of concrete type and cross-sectional shape on the failure mode，load-deformation relationship，flexural stiffness and resistance of CFSST specimens. The test results show that concrete made with waste materials has minor influence on the failure modes，but it has positive effect in improving the flexural stiffness and strength of new CFSST beams. A finite element （FE） model was then established to verify the feasibility and accuracy of current concrete and stainless steel models for further FE analysis. At last，the feasibility and accuracy of current design guidelines for predicting the flexural capacity were also analyzed. © 2024 Tongji University. All rights reserved.
Keyword ：
concrete-filled steel tube concrete-filled steel tube concrete made with waste material concrete made with waste material finite element analysis finite element analysis pure bending pure bending S35657 austenitic stainless steel S35657 austenitic stainless steel
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| GB/T 7714 | Yu, X. , Ouyang, F. , Zhang, Z. et al. Flexural Behaviour of Concrete Made with Waste Materials Filled New Stainless Steel Tubular Beams; [新 型 不 锈 钢 管 固 废 混 凝 土 构 件 受 弯 性 能 研 究] [J]. | Progress in Steel Building Structures , 2024 , 26 (3) : 62-69 . |
| MLA | Yu, X. et al. "Flexural Behaviour of Concrete Made with Waste Materials Filled New Stainless Steel Tubular Beams; [新 型 不 锈 钢 管 固 废 混 凝 土 构 件 受 弯 性 能 研 究]" . | Progress in Steel Building Structures 26 . 3 (2024) : 62-69 . |
| APA | Yu, X. , Ouyang, F. , Zhang, Z. , Wang, Z. . Flexural Behaviour of Concrete Made with Waste Materials Filled New Stainless Steel Tubular Beams; [新 型 不 锈 钢 管 固 废 混 凝 土 构 件 受 弯 性 能 研 究] . | Progress in Steel Building Structures , 2024 , 26 (3) , 62-69 . |
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为考察盐水冷却对S36950 不锈钢高温后力学性能的影响,选取普通S30408 不锈钢为参考对象进行了不同温度工况冷却后两类不锈钢的拉伸试验,获取高温盐水冷却后其力学性能指标(弹性模量、名义屈服强度、抗拉极限强度、断后伸长率等)的变化规律,与同类型钢材采用普通水冷却的既有高温后试验结果对比.结果表明,盐水冷却后两类不锈钢表观均出现了明显的腐蚀现象;盐水冷却使得两类不锈钢在敏化温度段(600～800℃)的高温后弹性模量与延伸率有所波动;采用盐水冷却的两类不锈钢高温后强度均较普通水冷有所下降,且S36950 不锈钢的屈服与极限强度在 800℃高温后下降显著.基于试验结果修正了既有不锈钢高温后本构模型,提高了其对盐水冷却的S36950 不锈钢高温后应力-应变关系的预测精度.
Keyword ：
力学性能 力学性能 奥氏体不锈钢 奥氏体不锈钢 本构模型 本构模型 盐水冷却 盐水冷却 高温后 高温后
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| GB/T 7714 | 张铮 , 黄晓明 , 余鑫 . 盐水冷却对S36950不锈钢力学性能的影响 [J]. | 福建工程学院学报 , 2023 , 21 (4) : 307-313 . |
| MLA | 张铮 et al. "盐水冷却对S36950不锈钢力学性能的影响" . | 福建工程学院学报 21 . 4 (2023) : 307-313 . |
| APA | 张铮 , 黄晓明 , 余鑫 . 盐水冷却对S36950不锈钢力学性能的影响 . | 福建工程学院学报 , 2023 , 21 (4) , 307-313 . |
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本发明涉及一种新型的中空夹层钢管混凝土构件及其连接方法，包括由多段外钢管组成的外钢管构件和位于外钢管构件内部且由多段内钢管组成的内钢管构件，所述外钢管构件和内钢管构件之间设有夹层，所述夹层由上至下间隔设置有多个混凝土层，相邻混凝土层之间设置有用以填充高强灌注砂浆的空腔，所述空腔内设置有抗剪连接件，相邻外钢管的连接处与相邻内钢管的连接处错位设置且均位于空腔侧部。本发明结构简单，设计合理，连接可靠、耐腐蚀性好、施工方便、受力连续性好及外立面平滑美观，同时提高了抗剪切性能。
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| GB/T 7714 | 余鑫 , 欧阳帆 , 王志滨 . 一种新型的中空夹层钢管混凝土构件及其连接方法 : CN202111665625.6[P]. | 2021-12-31 00:00:00 . |
| MLA | 余鑫 et al. "一种新型的中空夹层钢管混凝土构件及其连接方法" : CN202111665625.6. | 2021-12-31 00:00:00 . |
| APA | 余鑫 , 欧阳帆 , 王志滨 . 一种新型的中空夹层钢管混凝土构件及其连接方法 : CN202111665625.6. | 2021-12-31 00:00:00 . |
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本发明提供了一种抗滑移型可拆卸式不锈钢栓钉抗剪连接件，包括栓钉杆，钢板上对应栓钉杆设置的定位孔，防腐螺帽，栓钉杆的一端设置有螺纹接头，螺纹接头贯穿定位孔伸出，螺纹接头螺固于防腐螺帽内，栓钉杆与定位孔之间连接有套筒，所述定位孔为锥形孔。本发明设计合理，满足抗剪承载力的同时具有很好的延性，可以更好适用于钢‑混凝土组合结构材料高强化发展的特点；其次锥形螺帽采用不锈钢，不锈钢具有优异的延展性与变形强化性能使得在旋紧过程中可以通过锥形套筒的塑性变形一方面使得连接紧密，另一方面相应的变形强化使得锥形套筒强度更高；不锈钢螺帽的使用，不仅从材料本身提高了耐腐蚀性能，还可以避免后期可能出现的缝隙腐蚀风险。
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| GB/T 7714 | 余鑫 , 叶兴宇 , 黄振宇 . 一种抗滑移型可拆卸式不锈钢栓钉抗剪连接件 : CN202111664830.0[P]. | 2021-12-31 00:00:00 . |
| MLA | 余鑫 et al. "一种抗滑移型可拆卸式不锈钢栓钉抗剪连接件" : CN202111664830.0. | 2021-12-31 00:00:00 . |
| APA | 余鑫 , 叶兴宇 , 黄振宇 . 一种抗滑移型可拆卸式不锈钢栓钉抗剪连接件 : CN202111664830.0. | 2021-12-31 00:00:00 . |
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