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学者姓名：杨艳
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Abstract ：
This study developed a machine learning framework to optimize MPCM-integrated concrete for compressive strength and slump. A comprehensive database of 157 experimental datasets was established. Three models (SVM, BPNN, ELM) were evaluated, with ELM showing superior performance (R-2=0.93 for strength, R-2=0.73 for slump). Feature analysis revealed water content as the most influential factor, followed by MPCM dosage and sand content. Experimental results showed adding 40-50 % extra water improved slump but reduced strength by 45 %. Superplasticizer effectiveness plateaued beyond 10 % dosage. Multi-objective optimization using PSO generated practical mix designs meeting target specifications (30 similar to 50 MPa strength, 20 cm slump). Experimental validation confirmed prediction accuracy with less than 5 % deviation. The optimized mixes maximized MPCM content while minimizing cement usage. This data-driven approach provides reliable guidance for sustainable concrete design. Future research will incorporate additional parameters like thermal properties and expand the dataset for broader applicability. The method offers significant potential for energy-efficient construction applications.
Keyword ：
Compressive strength Compressive strength Machine learning Machine learning Microencapsulated phase change materials Microencapsulated phase change materials Multi-objective optimization Multi-objective optimization Slump Slump
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| GB/T 7714 | Wei, Jiangang , Zhang, Hanwen , Yang, Yan et al. Multi-objective optimization of compressive strength and slump in MPCM-integrated concrete using machine learning [J]. | MATERIALS TODAY COMMUNICATIONS , 2025 , 46 . |
| MLA | Wei, Jiangang et al. "Multi-objective optimization of compressive strength and slump in MPCM-integrated concrete using machine learning" . | MATERIALS TODAY COMMUNICATIONS 46 (2025) . |
| APA | Wei, Jiangang , Zhang, Hanwen , Yang, Yan , Zhang, Wei , Liu, Xiang . Multi-objective optimization of compressive strength and slump in MPCM-integrated concrete using machine learning . | MATERIALS TODAY COMMUNICATIONS , 2025 , 46 . |
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This study bridges the knowledge gap regarding the eccentric compression behavior of circular ultra-high-strength concrete filled high-strength steel tube (CuFShT) columns. Tests on 12 medium-length CuFShT specimens with varying steel contents and load eccentricities revealed their failure modes, load-deflection responses, and steel strains. Finite element models were developed to analyze the effects of load eccentricity, slenderness ratio, and cross-sectional parameters on the ultimate load-bearing capacity. Calculation methods for the ultimate capacity, including an evaluation of existing design codes, are discussed, and an explicit method for engineering applications is proposed. The results show that an increased steel content enhances the flexural stiffness and load-bearing capacity, whereas a higher eccentricity significantly reduces the load-bearing capacity. The combined influence of the eccentricity and slenderness ratio suggests the need for an overall reduction factor in the design calculations. After normalizing the slenderness, the cross-sectional parameters showed a minimal impact. Among the existing design codes, including AISC 360–16, AIJ-2008, and T/CECS 987–2021, the European standard EN 1994–1–1 provides the most accurate predictions for CuFShT columns. By incorporating the Perry-Robertson formula, the coupled effects of the eccentricity and slenderness ratio were effectively captured, enabling a precise estimation of the ultimate load-bearing capacity for eccentrically-compressed CuFShT columns using the explicit calculation formula. © 2025 The Authors
Keyword ：
Boiler codes Boiler codes Electric codes Electric codes Tubular steel structures Tubular steel structures Ultra-high performance concrete Ultra-high performance concrete
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| GB/T 7714 | Luo, Xia , Yu, Xinye , Wei, Jiangang et al. Mechanical response of slender ultra-high-strength concrete filled high-strength steel tube columns under eccentric compression [J]. | Case Studies in Construction Materials , 2025 , 22 . |
| MLA | Luo, Xia et al. "Mechanical response of slender ultra-high-strength concrete filled high-strength steel tube columns under eccentric compression" . | Case Studies in Construction Materials 22 (2025) . |
| APA | Luo, Xia , Yu, Xinye , Wei, Jiangang , Jiang, Chenchen , Yang, Yan . Mechanical response of slender ultra-high-strength concrete filled high-strength steel tube columns under eccentric compression . | Case Studies in Construction Materials , 2025 , 22 . |
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This paper experimentally and numerically investigates the structural behavior and resistances of ultra-high strength concrete filled high strength steel tube (CuFShT) stub columns subjected to combined compression and bending loads. Initially, twenty CuFShT stub column specimens with a steel ratio ranging 0.14 to 0.38 were tested under various eccentric loads, constructed from steel tubes with a nominal yield stress ranging from 813 to 1153 MPa, concrete with a compressive strength of 146.7 MPa. Experimental investigation includes the examinations of failure mode, failure load and the evolution of the neutral axis for the stub column specimens under combined loading. Additionally, the development and distribution of longitudinal strains, as well as the ratio of circumferential to longitudinal strains in the steel tubes, were discussed. Following the experimental results, a numerical modeling program was implemented. Finite element models were developed and validated against test results, then used for cross-sectional stress analysis to reveal the eccentric compression mechanism of CuFShT stub columns. Finally, test data were used to assess the applicability of design rules outlined in EN 1994-1-1 (EC4), AISC 360-16, AIJ-2008, and T/CECS 987-2021 to CuFShT stub columns under combined loading. The assessment findings suggest that EN 1994-1-1 (EC4) provides accurate predictions without accounting for the second-order effect, while AIJ-2008 yields precise predictions when considering this effect. Notably, there is an enhancement in predictive accuracy observed for each simplified N-M curve, particularly notable in the case of the curve delineated by T/CECS 987-2021, following adjustments to the pure axial compressive strength and pure bending capacity.
Keyword ：
Bearing capacity Bearing capacity Concrete filled steel tube Concrete filled steel tube Eccentric compression Eccentric compression High strength steel High strength steel N-M curve N-M curve Ultra-high strength concrete Ultra-high strength concrete
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| GB/T 7714 | Luo, Xia , Yu, Xinye , Wei, Jiangang et al. Structural performance of ultra-high strength concrete filled high strength steel tube stub columns under eccentric loading [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 97 . |
| MLA | Luo, Xia et al. "Structural performance of ultra-high strength concrete filled high strength steel tube stub columns under eccentric loading" . | JOURNAL OF BUILDING ENGINEERING 97 (2024) . |
| APA | Luo, Xia , Yu, Xinye , Wei, Jiangang , Li, Cong , Yang, Yan , Qiao, Huiyun et al. Structural performance of ultra-high strength concrete filled high strength steel tube stub columns under eccentric loading . | JOURNAL OF BUILDING ENGINEERING , 2024 , 97 . |
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The shear performance of three concrete-filled steel tubular (CFST) composite columns was investigated via single-point shear tests, considering shear-span ratios of 0.75, 1, and 1.5. The findings indicated that the failure mode of the CFST composite column transitioned from oblique compression shear failure to localized shear failure in the joint areas as shear-span ratio decreased. An extended analysis of the parameters was carried out utilizing the ABAQUS finite element model. The analysis indicates that the ultimate shear resistance capability of steel-concrete composite columns increases with the rise in the strength of the batten concrete, the batten concrete thickness-to-span ratio, and the outer diameter of column limbs. However, it decreases with an increase in shear- span ratio. The accuracy of the calculation methods for existing similar structures was assessed, and based on the force transmission mechanism of CFST composite columns, theoretical and simplified calculation methods were proposed that meet engineering precision requirements. Consequently, this method offers a valuable theoretical reference for engineering applications.
Keyword ：
Calculation method Calculation method Composite column Composite column Concrete-filled steel tube Concrete-filled steel tube Shear capability Shear capability Shear-span ratio Shear-span ratio
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| GB/T 7714 | Wei, Jian-Gang , Han, Jin-Peng , Xie, Zhi-Tao et al. STUDY ON THE ULTIMATE SHEAR PERFORMANCE OF CONCRET-FILLED STEEL TUBULAR COMPOSITE COLUMNS [J]. | ADVANCED STEEL CONSTRUCTION , 2024 , 20 (3) : 232-240 . |
| MLA | Wei, Jian-Gang et al. "STUDY ON THE ULTIMATE SHEAR PERFORMANCE OF CONCRET-FILLED STEEL TUBULAR COMPOSITE COLUMNS" . | ADVANCED STEEL CONSTRUCTION 20 . 3 (2024) : 232-240 . |
| APA | Wei, Jian-Gang , Han, Jin-Peng , Xie, Zhi-Tao , Yang, Yan , Zhang, Wei . STUDY ON THE ULTIMATE SHEAR PERFORMANCE OF CONCRET-FILLED STEEL TUBULAR COMPOSITE COLUMNS . | ADVANCED STEEL CONSTRUCTION , 2024 , 20 (3) , 232-240 . |
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To explore the behavior of ultra-high strength concrete filled steel tubular (UHSC-FST) lattice short columns under eccentric compressive loads, experimental analyses on four specimens and 276 finite element models using ABAQUS were conducted. The study focused on the effects of steel tube wall thickness, concrete strength, steel tube strength, and load eccentricity on failure modes, load-displacement curves, and ultimate load-bearing capacity. Results showed that for columns with minor eccentricity-induced compressive failure, the reduction coefficient of ultimate load capacity has a weak correlation with the parameters. However, for columns with significant eccentricity-induced tensile failure, the reduction coefficient increases with steel tube thickness and strength and decreases with concrete strength. The center-to-center distance of the columns has a minor effect. Based on these findings, a comparative analysis of existing standards was conducted, leading to the development of an accurate method for calculating the ultimate load-bearing capacity of eccentric CFST lattice columns. This method is applicable to various cross-sectional dimensions, material strengths, and steel tube wall thicknesses, with calculation errors within 10 %, ensuring it meets engineering precision requirements.
Keyword ：
Bearing capacity Bearing capacity Calculation method Calculation method CFST lattice column CFST lattice column Eccentric compression Eccentric compression Finite element analysis Finite element analysis Ultra-high-strength concrete Ultra-high-strength concrete
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| GB/T 7714 | Wei, Jian-Gang , Han, Jin-Peng , Luo, Xia et al. Eccentric load capacity of ultra-high strength concrete-filled steel tubular lattice short columns [J]. | STRUCTURES , 2024 , 69 . |
| MLA | Wei, Jian-Gang et al. "Eccentric load capacity of ultra-high strength concrete-filled steel tubular lattice short columns" . | STRUCTURES 69 (2024) . |
| APA | Wei, Jian-Gang , Han, Jin-Peng , Luo, Xia , Yang, Yan , Li, Cong . Eccentric load capacity of ultra-high strength concrete-filled steel tubular lattice short columns . | STRUCTURES , 2024 , 69 . |
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This study addresses the current research gap in the mechanical performance of Concrete Filled Steel Tubular (CFST) lattice columns, focusing on high-strength or ultra-high-strength materials. Tests were conducted on six Ultra-High-Strength Concrete (UHSC) filled steel tubular lattice short columns to investigate their axial compression performance. Experimental parameters included core concrete strength and steel tube wall thickness of the CFST limbs. Discussions covered failure modes, load-displacement curves of specimens, load-strain relationships of limb tubes and lacing tubes, and Poisson's ratios of limb tubes. Subsequently, Finite Element Model (FEM) was established using ABAQUS Software and verified by test results. The FEM was employed for further parameter analysis, including the steel tube wall thickness of the limb, the core concrete strength of the limb, the steel tube strength of the limb, and the center distance between the limbs. Finally, existing calculation methods for predicting the ultimate bearing capacity of UHSC-filled steel tubular lattice short columns were evaluated, leading to the proposal of a practical and accurate calculation method based on the findings.
Keyword ：
Axial compression performance Axial compression performance Calculation method Calculation method Concrete filled steel tube Concrete filled steel tube Lattice column Lattice column Ultimate bearing capacity Ultimate bearing capacity Ultra -high -strength concrete Ultra -high -strength concrete
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| GB/T 7714 | Wei, Jian-Gang , Han, Jin-Peng , Luo, Xia et al. Axial compression performance of ultra-high-strength concrete filled steel tubular lattice short columns [J]. | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2024 , 216 . |
| MLA | Wei, Jian-Gang et al. "Axial compression performance of ultra-high-strength concrete filled steel tubular lattice short columns" . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH 216 (2024) . |
| APA | Wei, Jian-Gang , Han, Jin-Peng , Luo, Xia , Yang, Yan , Li, Cong , Wang, Wen-Rong . Axial compression performance of ultra-high-strength concrete filled steel tubular lattice short columns . | JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH , 2024 , 216 . |
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Phase change materials melt and solidify at different temperature ranges called Phase change hysteresis. This phenomenon should be understood and evaluated in order to adequately design energy storage concretes for applications. Although many studies have analyzed the phase change process in pure - phase change materials such as paraffin. However, there is not enough information about the Phase change hysteresis of energy storage concrete. In order to realistically reproduce the working condition of concrete. This study explores phase change hysteresis in energy storage concrete slabs, focusing on the impact of microcapsule concentration and temperature change rate on thermal efficiency. Experiments were conducted to analyze the thermophysical properties, particularly observing the variations in specific heat capacity and phase transition temperatures. Results showed that increasing the microcapsule concentration enhances the specific heat capacity and latent heat of phase change, while faster temperature changes intensify hysteresis effects. Compared with the results of previous studies. Phase change hysteresis is more significant due to the pore and complex structure of energy storage concrete that impedes heat transfer. The experimental latent heat values were approximately 75 % of theoretical predictions, likely due to microcapsule damage and microstructural impacts on heat transfer. The study's findings are crucial for optimizing the thermal performance of energy storage concrete.
Keyword ：
Energy storage concrete Energy storage concrete Latent heat Latent heat Phase change hysteresis Phase change hysteresis Phase change materials Phase change materials Thermal performance Thermal performance
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| GB/T 7714 | Wei, Jiangang , Zhang, Hanwen , Zhang, Wei et al. Enhancing thermal performance of energy storage concrete through MPCM integration: An experimental study [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 91 . |
| MLA | Wei, Jiangang et al. "Enhancing thermal performance of energy storage concrete through MPCM integration: An experimental study" . | JOURNAL OF BUILDING ENGINEERING 91 (2024) . |
| APA | Wei, Jiangang , Zhang, Hanwen , Zhang, Wei , Liu, Xiang , Yang, Yan . Enhancing thermal performance of energy storage concrete through MPCM integration: An experimental study . | JOURNAL OF BUILDING ENGINEERING , 2024 , 91 . |
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为分析钢管榫卯节点连接构造对节段预制拼装桥墩抗震性能的影响,以福建省某互通立交桥匝道桥为背景进行研究.首先进行钢管榫卯节点连接的足尺节段预制拼装桥墩试设计,采用MIDAS Civil软件建立实桥模型,对试设计的足尺节段预制拼装桥墩开展静力承载力验算;然后按1∶3.75比例缩尺,设计、制作1根整体现浇桥墩(RC)试件和1根钢管榫卯节点连接的节段预制拼装桥墩(PSBP-MTJ)试件,开展拟静力试验;最后对比分析两试件的破坏模式、滞回曲线、骨架曲线与延性、累积滞回耗能、刚度退化与残余位移.结果表明:两试件的破坏模式类似,均为整体压弯型破坏,PSBP-MTJ试件塑性铰区因墩底灌浆套筒的存在而上移;两试件滞回曲线饱满无捏缩,耗能能力相当;PSBP-MTJ试件水平承载能力较RC试件提高约19％;PSBP-MTJ试件的拼装节段之间无剪切滑移出现,预应力筋延缓了其刚度退化,显著提高了其自复位性能,其残余位移仅为RC试件的67％,且残余位移与最大位移比值显著小于未采用无粘结预应力筋连接试件.
Keyword ：
抗震性能 抗震性能 拟静力试验 拟静力试验 有限元法 有限元法 灌浆套筒 灌浆套筒 节段预制拼装桥墩 节段预制拼装桥墩 钢管榫卯节点连接 钢管榫卯节点连接
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| GB/T 7714 | 韦建刚 , 应浩东 , 杨艳 et al. 采用钢管榫卯节点连接的节段预制拼装桥墩抗震性能研究 [J]. | 桥梁建设 , 2024 , 54 (5) : 30-38 . |
| MLA | 韦建刚 et al. "采用钢管榫卯节点连接的节段预制拼装桥墩抗震性能研究" . | 桥梁建设 54 . 5 (2024) : 30-38 . |
| APA | 韦建刚 , 应浩东 , 杨艳 , 林本麟 . 采用钢管榫卯节点连接的节段预制拼装桥墩抗震性能研究 . | 桥梁建设 , 2024 , 54 (5) , 30-38 . |
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开展了闽浙编木拱桥燕尾榫节点足尺模型拟静力试验,分析了闽浙编木拱桥与古建筑木结构中燕尾榫节点受力机理的异同,探讨了燕尾榫节点受力模型应用于闽浙编木拱桥燕尾榫节点的适用性;根据力学平衡和变形协调条件,建立了考虑节点拔榫量与榫卯口缝隙的闽浙编木拱桥燕尾榫节点弯矩转角力学模型与计算公式,并通过试验数据和有限元分析验证了闽浙编木拱桥燕尾榫节点力学模型和节点刚度,揭示了转角位移和加载行程对拔榫量的影响和榫卯口缝隙与两端轴力对燕尾榫节点刚度的影响.研究结果表明:弹性阶段闽浙编木拱桥燕尾榫节点滞回耗能能力随两端轴力增加而增大,转角大于0.04 rad时构件进入屈服阶段,挤压变形不能恢复,转角达到0.06 rad时滞回曲线斜率停止增长,加载结束后燕尾榫节点未破坏;由于闽浙编木拱桥与古建筑木结构中燕尾榫节点受力机理不同,古建筑木结构中的燕尾榫节点受力模型不适用于闽浙编木拱桥燕尾榫节点,有限元计算所得闽浙编木拱桥燕尾榫节点弯矩转角与试验结果的误差仅为3.2％,弹性正、负最大弯矩与试验值的误差分别为16.7％与-5.2％,说明建立的弯矩转角力学模型可精准反映出节点在转动过程中的弯矩转角变化规律;拔榫量在弹性阶段主要受转角影响,弹塑性阶段则主要受加载控制位移和加载级数影响;榫卯口缝隙从0.06 mm减小至0.01 mm时,节点刚度从29.46 kN·m·rad-1增加至52.24 kN·m·rad-1,反映了燕尾榫节点刚度随榫卯口缝隙的减小而增大的趋势.综上所述,提出的力学模型可为现存闽浙编木拱桥保护、修缮和全桥结构抗震性能研究提供参考.
Keyword ：
力学性能 力学性能 受力机理 受力机理 弯矩转角力学模型 弯矩转角力学模型 桥梁工程 桥梁工程 燕尾榫节点 燕尾榫节点 节点刚度 节点刚度 闽浙编木拱桥 闽浙编木拱桥
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| GB/T 7714 | 杨艳 , 郑裔 , 黄聪燕 et al. 闽浙编木拱桥燕尾榫节点力学模型 [J]. | 交通运输工程学报 , 2024 , 24 (5) : 113-130 . |
| MLA | 杨艳 et al. "闽浙编木拱桥燕尾榫节点力学模型" . | 交通运输工程学报 24 . 5 (2024) : 113-130 . |
| APA | 杨艳 , 郑裔 , 黄聪燕 , 韦建刚 , 吴庆雄 , 陈宝春 . 闽浙编木拱桥燕尾榫节点力学模型 . | 交通运输工程学报 , 2024 , 24 (5) , 113-130 . |
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The interlayer component is the weak layer of the composite beam. For the post-strengthened beam, the upper and lower layers are connected by glue bonding. The glue is mainly applied manually, and the craft has great randomness, and the randomness has spatial variability, which affect the normal use and bearing capacity reliability of the composite beams. In order to study the probability response of composite beams considering the spatial random field characteristics of interlayer materials, a finite element model was established. The upper and lower beams were both Euler beam, and the interlayer components were regarded as continuous springs, which were discretized and used as springs to connect the upper and lower beams into system stiffness. The random field characteristics of the continuous spring were expressed by Karhunen-Loeve expansion, and the statistical moments of the response were calculated by the reduced-dimension point estimation method, forming the calculation strategy of KLE-PEM. The comparison with MCS shows that this strategy has high accuracy and efficiency. Probabilistic structural response of composite beams with different correlation length, coefficient of variation of interface stiffness and interface stiffness of were analysis. The results show that the correlation length has little effect on the probability distribution of the response compared with the interlayer stiffness and its coefficient of variation (COV). The COV of interlayer stiffness has little influence on the mean value of the response but has great influence on the dispersion of the result. The greater the COV is, the greater the dispersion of the result is. The interlayer stiffness has a great influence on the statistical characteristics of the response, and within a certain range, the greater the interlayer stiffness, the smaller the deformation of the composite beam and the smaller the probability range.
Keyword ：
Composite beam Composite beam Interlayer Interlayer Karhunen-Loeve expansion Karhunen-Loeve expansion Point estimate method Point estimate method Probabilistic analysis Probabilistic analysis
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| GB/T 7714 | Yang, Yan , Liu, Xiang , Zhang, Xiao-Yi . Probabilistic structural analysis of a composite beam considering random field of interface [J]. | STRUCTURES , 2023 , 57 . |
| MLA | Yang, Yan et al. "Probabilistic structural analysis of a composite beam considering random field of interface" . | STRUCTURES 57 (2023) . |
| APA | Yang, Yan , Liu, Xiang , Zhang, Xiao-Yi . Probabilistic structural analysis of a composite beam considering random field of interface . | STRUCTURES , 2023 , 57 . |
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