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学者姓名：杨艳
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Abstract ：
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. © 2024 Elsevier Ltd
Keyword ：
Concrete slabs Concrete slabs Heat storage Heat storage Heat transfer Heat transfer Hysteresis Hysteresis Latent heat Latent heat Microstructure Microstructure Phase change materials Phase change materials Specific heat Specific heat Storage (materials) Storage (materials)
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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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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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Abstract ：
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. © 2024 Institution of Structural Engineers
Keyword ：
ABAQUS ABAQUS Bond strength (materials) Bond strength (materials) Columns (structural) Columns (structural) Compressive strength Compressive strength Crystal lattices Crystal lattices Load limits Load limits Pressure vessels Pressure vessels Tubular steel structures Tubular steel structures Ultra-high performance concrete Ultra-high performance 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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In this paper, the stress analysis of the most critical beam-arch joint of Yuehu Bridge is conducted, despite the variation in the specific structure of each tied arch bridge. To achieve this, two specimens with different scale ratios were designed. The smaller specimen was used to consider the effect of bridge deck and loading to failure. The experimental results indicate that both specimens did not exhibit significant deformation under the design load, and the measuring point's stress was located in the elastic section. This implies that the original bridge structure design is rational. However, the arch rib steel plate of the 1/8 scale specimen buckled when subjected to 1.8 times the design load. To validate the experimental results, a finite element model that considers the elastoplastic behavior of the material was established and compared with the experimental results. The comparison shows that the finite element model can predict the mechanical behavior of the structure effectively, thus confirming the rationality of the structure design. Additionally, the study also analyzed the buckling problem of tied arch bridges, which is another critical issue. The in-plane and out-of-plane buckling of fixed and hinged parabolic arches under uniform axial compression were investigated. The results demonstrate that the boundary conditions, rise-span ratio, and bridge deck width significantly affect the buckling performance. Overall, this study provides essential insights into the stress and buckling behavior of tied arch bridges, which can guide the design and construction of such structures in the future.
Keyword ：
Arch Arch Beam-arch joint Beam-arch joint Experiment Experiment Finite element method Finite element method Mechanical behavior Mechanical behavior
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| GB/T 7714 | Yang, Yan , Lin, Benqing , Zhang, Wei . Experimental and numerical investigation of an arch-beam joint for an arch bridge [J]. | ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING , 2023 , 23 (2) . |
| MLA | Yang, Yan et al. "Experimental and numerical investigation of an arch-beam joint for an arch bridge" . | ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING 23 . 2 (2023) . |
| APA | Yang, Yan , Lin, Benqing , Zhang, Wei . Experimental and numerical investigation of an arch-beam joint for an arch bridge . | ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING , 2023 , 23 (2) . |
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An experimental study on six axially-loaded composite short columns with different thicknesses of steel tube and that of the concrete plate was carried out. Compared to the mechanical behavior of component specimens under axially compressed, the failure modes, compression deformation, and strain process were obtained. The two main parameters that have a significant enhancement to cross-sectional strength were also analyzed. The failure of an axially loaded UHPC-CFST short column is due to the crushing of the UHPC plate, while the CFST member does reach its maximum resistance. A reduction coefficient K ' c, related to the confinement coefficient, is introduced to account for the contribution of CFST members to the ultimate load-carrying capacity of the UHPC-CFST composite short columns. Based on the regression analysis of the relationship between the confinement index xi and the value of fcc/fc, a unified formula for estimating the axial compressive strength of CFST short columns was proposed, combined with the experimental results in this research, and an equation for reliably predicting the strength of UHPC-CFST composite short columns under axial compression were also proposed.
Keyword ：
axial compression axial compression bearing capacity bearing capacity composite column composite column Concrete-Filled Steel Tube (CFST) Concrete-Filled Steel Tube (CFST) Ultra High Performance Concrete (UHPC) Ultra High Performance Concrete (UHPC)
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| GB/T 7714 | Wei, Jiangang , Xie, Zhitao , Zhang, Wei et al. Axial compressed UHPC plate-concrete filled steel tubular composite short columns, Part I: Bearing capacity [J]. | STEEL AND COMPOSITE STRUCTURES , 2023 , 47 (3) : 405-421 . |
| MLA | Wei, Jiangang et al. "Axial compressed UHPC plate-concrete filled steel tubular composite short columns, Part I: Bearing capacity" . | STEEL AND COMPOSITE STRUCTURES 47 . 3 (2023) : 405-421 . |
| APA | Wei, Jiangang , Xie, Zhitao , Zhang, Wei , Yang, Yan , Luo, Xia , Chen, Baochun . Axial compressed UHPC plate-concrete filled steel tubular composite short columns, Part I: Bearing capacity . | STEEL AND COMPOSITE STRUCTURES , 2023 , 47 (3) , 405-421 . |
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To improve the seismic performance and repairability of precast structures, an artificial plastic hinge (APH) was proposed for precast beam-column joint. The proposed APH was made from a combination of steel and high-strength-concrete (HSC), and the AHP will dissipates energy through metal plastic deformation when the earthquake occurs. To carry out the research, three full-scale beam-column joints were designed and fabricated, including one cast-in-place joint and two precast joints with APH. By using hysteretic loads, the seismic performance of joint was examined. For more systematic research, the finite element models were established and verified, and the parameter analysis was carried out. The findings demonstrate that the proposed joint performs well in terms of ductility and energy dissipation. It is recommended to use 12 mm steel plate thickness in the actual design, and to ensure the number of connecting bolts to avoid connection damage under earthquake. Through design optimization, the damage to the APH will be revealed at the location of the replaceable steel components, so as to achieve rapid repair after the earthquake.
Keyword ：
Artificial plastic hinge Artificial plastic hinge Column-beam joint Column-beam joint Precast structure Precast structure Repairable structure Repairable structure Seismic performance Seismic performance
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| GB/T 7714 | Yang, Yan , Gao, Shenghui , Zheng, Yiran et al. Seismic performance of precast column-beam joint with artificial plastic hinge [J]. | JOURNAL OF BUILDING ENGINEERING , 2023 , 67 . |
| MLA | Yang, Yan et al. "Seismic performance of precast column-beam joint with artificial plastic hinge" . | JOURNAL OF BUILDING ENGINEERING 67 (2023) . |
| APA | Yang, Yan , Gao, Shenghui , Zheng, Yiran , Liu, Xiang , Zhang, Wei , Lin, Ben-Qing . Seismic performance of precast column-beam joint with artificial plastic hinge . | JOURNAL OF BUILDING ENGINEERING , 2023 , 67 . |
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For plate structures, their random parameters can be regarded as a two-dimensional random field in the plane. To solve the plate theory considering a two-dimensional random field, an efficient strategy for the stochastic finite element method was adopted. Firstly, the stochastic finite element method was used to establish the plate structural model, in which the random field characteristics of the parameter were considered, and the mathematical expression of its random field was obtained through the Karhunen-Loeve expansion; secondly, the point estimate method was applied to calculate the statistics of random structures. The computational efficiency can be significantly improved through the reference point selection strategy. The accuracy and efficiency of the calculation strategy were verified, and the influences of correlation length and coefficient of variation of the parameter on the random response of plate structures under different plate types (including Kirchhoff plate and Mindlin plate) and boundary conditions (including simply supported and clamped supported) were discussed. The proposed method can provide some help in solving static problems of plate structures.
Keyword ：
Kirchhoff plate Kirchhoff plate KL expansion KL expansion Mindlin plate Mindlin plate plate structure plate structure stochastic finite element method stochastic finite element method
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| GB/T 7714 | Yang, Yan , Ge, Fang-Wen , Liu, Xiang . Stochastic Finite Element Analysis of Plate Structures Considering Spatial Parameter Random Fields [J]. | MATHEMATICS , 2023 , 11 (11) . |
| MLA | Yang, Yan et al. "Stochastic Finite Element Analysis of Plate Structures Considering Spatial Parameter Random Fields" . | MATHEMATICS 11 . 11 (2023) . |
| APA | Yang, Yan , Ge, Fang-Wen , Liu, Xiang . Stochastic Finite Element Analysis of Plate Structures Considering Spatial Parameter Random Fields . | MATHEMATICS , 2023 , 11 (11) . |
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Abstract ：
正交异性钢桥面板受力行为复杂，基于子系统可以更加有效地分析钢桥面板的疲劳受力行为，以钢桥面板子系统1为研究对象，分析轮载作用面积和轮载作用位置对子系统1疲劳受力行为的影响，在此基础上分析了盖板厚度和U肋厚度对U肋-盖板构造细节处3个弯矩的影响。同时基于等效结构应力法，对子系统1的主导疲劳开裂模式进行研究。研究结果表明：轮载作用面积为600 mm×200 mm且轮载作用在U肋间时，子系统1中U肋-盖板构造细节的受力最不利；子系统1以U肋外侧弯矩Mr大于U肋内侧弯矩Ml的情况为主；子系统1焊根开裂模式的主导疲劳开裂模式均为开裂模式Ⅱ，增大盖板厚度能有效降低焊缝焊根开裂的风险；焊趾开裂模式的主导疲劳开裂模式与盖板和U肋厚度有关，增大盖板厚度能减小开裂模式Ⅰ发生的概率，增大U肋厚度能减小开裂模式Ⅲ发生的概率；在焊根和焊趾的主S-N曲线相同的情况下，子系统1的主导开裂模式为焊趾开裂模式。
Keyword ：
U肋-盖板构造细节 U肋-盖板构造细节 正交异性钢桥面板 正交异性钢桥面板 疲劳开裂模式 疲劳开裂模式 等效结构应力法 等效结构应力法 轮载作用位置 轮载作用位置 轮载作用面积 轮载作用面积
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| GB/T 7714 | 赵秋 , 游鹏飞 , 杨艳 . 钢桥面板U肋-盖板构造细节（子系统1）疲劳受力行为研究 [J]. | 建筑钢结构进展 , 2023 , 25 (05) : 82-92 . |
| MLA | 赵秋 et al. "钢桥面板U肋-盖板构造细节（子系统1）疲劳受力行为研究" . | 建筑钢结构进展 25 . 05 (2023) : 82-92 . |
| APA | 赵秋 , 游鹏飞 , 杨艳 . 钢桥面板U肋-盖板构造细节（子系统1）疲劳受力行为研究 . | 建筑钢结构进展 , 2023 , 25 (05) , 82-92 . |
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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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为了研究三轴受压下UHPC的受力性能，以围压大小和钢纤维掺量为试验参数，进行20组UHPC试件常规三轴试验，分析UHPC的破坏形态、应力-应变曲线、峰值应力和应变等力学性能。结果表明：围压和钢纤维掺量均为零的试件破坏时呈劈裂破坏，其他试件则呈剪切破坏；围压和钢纤维掺量对应力-应变曲线弹性模量和弹性段曲线形状影响较小；随着围压增大，峰值应力和应变呈不断增大趋势；随着钢纤维掺量增大，峰值应力和轴向峰值应变呈先增大后不变和先增大后减小趋势，环向峰值应变则呈增大趋势。通过对UHPC八面体正应力-体积应变和剪应力-剪应变关系进行分析，基于Drucker-Prager二参数准则，建立了UHPC八面体破坏准则计算方法。`
Keyword ：
八面体破坏准则 八面体破坏准则 围压 围压 应力-应变关系 应力-应变关系 破坏形态 破坏形态 钢纤维掺量 钢纤维掺量
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| GB/T 7714 | 周俊 , 韦建刚 , 杨艳 et al. UHPC三轴受压力学性能研究 [J]. | 工程力学 , 2023 , (11) : 206-217,226 . |
| MLA | 周俊 et al. "UHPC三轴受压力学性能研究" . | 工程力学 11 (2023) : 206-217,226 . |
| APA | 周俊 , 韦建刚 , 杨艳 , 陈宝春 , 黄颖 . UHPC三轴受压力学性能研究 . | 工程力学 , 2023 , (11) , 206-217,226 . |
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