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学者姓名：余鑫
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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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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 ：
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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本发明涉及一种可重复使用型不锈钢管混凝土组合桩及其制作工艺，其中该可重复使用型组合桩包括同轴上下间隔设置且结构相同的第一不锈钢管混凝土桩和第二不锈钢管混凝土桩，所述第一不锈钢管混凝土桩与第二不锈钢管混凝土桩之间同轴固定设有相同外周径的桩接头，桩接头的外周壁上均布嵌设有可伸缩的不锈钢刀片，收缩时不锈钢刀片均不超出桩接头的外周壁，伸展时不锈钢刀片超出桩接头的外周壁，所述第一不锈钢管混凝土桩、第二不锈钢管混凝土桩和桩接头的中心穿设有螺杆，本发明桩体自重小、节约材料、同时竖向和水平承载力高、抗扭刚度大抗扭承载力高等优点；在桩体接头处设置伸缩刀盘便于后期取桩时可以扰动桩身周围土体，便于桩体取出。
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| GB/T 7714 | 余鑫 , 尤海磊 , 王志滨 . 重复使用型不锈钢管混凝土组合桩及其制作工艺 : CN202111459640.5[P]. | 2021-12-02 00:00:00 . |
| MLA | 余鑫 et al. "重复使用型不锈钢管混凝土组合桩及其制作工艺" : CN202111459640.5. | 2021-12-02 00:00:00 . |
| APA | 余鑫 , 尤海磊 , 王志滨 . 重复使用型不锈钢管混凝土组合桩及其制作工艺 : CN202111459640.5. | 2021-12-02 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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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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本实用新型涉及一种基于折纸原理的不锈钢管混凝土受压构件，包括同轴设置的内折叠钢管和外折叠钢管，内折叠钢管和外折叠钢管均由不锈钢板采用Kresling折叠法折叠而成，内折叠钢管和外折叠钢管之间灌装混凝土；内折叠钢管和外折叠钢管的折叠旋转方向相反；内折叠钢管的上、下边缘均通过内卡扣扣紧；外折叠钢管上、下边缘均通过外卡扣扣紧；位置相对应的内卡扣与外卡扣之间通过连杆相连接。通过Kresling折叠法制作成折叠钢管，极大地节省运输空间、提高运输效率和降低运输成本，也避免运输过程中难以避免的碰撞导致钢管发生局部屈曲的风险，提高现场施工的效率；充分利用不锈钢的抗腐蚀性强，使其在山区和海岛离岸地区可以充分发挥其抗腐蚀性强的优点。
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| GB/T 7714 | 余鑫 , 王涛 , 王法承 . 基于折纸原理的不锈钢管混凝土受压构件 : CN202223182621.5[P]. | 2022-11-30 00:00:00 . |
| MLA | 余鑫 et al. "基于折纸原理的不锈钢管混凝土受压构件" : CN202223182621.5. | 2022-11-30 00:00:00 . |
| APA | 余鑫 , 王涛 , 王法承 . 基于折纸原理的不锈钢管混凝土受压构件 : CN202223182621.5. | 2022-11-30 00:00:00 . |
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This paper made efforts on investigating low-temperature mechanical properties of new constructional stainless steel (SS) QN1906Mo. Forty-two tensile coupons were firstly tensioned at four low temperatures of 30,-30,-60, and-80 C. Environment for testing low temperatures was realized through an insulation chamber with injecting LNG. The test results reported low-temperature mechanical properties of SS QN1906Mo materials and welds. Test results showed that decreasing the temperature from 30 to-80 C did not affect the ductility and elastic Young's modulus of SS QN1906Mo material, but significantly increased yield and ultimate strengths of SS QN1906Mo material by 37% and 35%. Decreasing the temperature from 30 to-80 C also exhibited equivalent increments in yield or ultimate for weld coupons to those material coupons but with much larger scatters due to the air voids in the weld coupons. Finally, this paper developed constitutive models to describe stress-strain laws of SS QN1906Mo at varying T range of-80 & SIM;30 C, which were proved their capabilities.
Keyword ：
Cold region Cold region Construction material Construction material Low temperature Low temperature Mechanical property Mechanical property Stainless steel Stainless steel Stress-strain law Stress-strain law Tension test Tension test
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| GB/T 7714 | Yan, Jia-Bao , Zhang, Biao , Yu, Xin et al. Mechanical properties of stainless steel QN1906Mo at sub-zero temperatures: Tests and stress-strain models [J]. | THIN-WALLED STRUCTURES , 2022 , 179 . |
| MLA | Yan, Jia-Bao et al. "Mechanical properties of stainless steel QN1906Mo at sub-zero temperatures: Tests and stress-strain models" . | THIN-WALLED STRUCTURES 179 (2022) . |
| APA | Yan, Jia-Bao , Zhang, Biao , Yu, Xin , Xie, Jian . Mechanical properties of stainless steel QN1906Mo at sub-zero temperatures: Tests and stress-strain models . | THIN-WALLED STRUCTURES , 2022 , 179 . |
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