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学者姓名：杨艳
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Abstract ：
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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本实用新型公开了主梁转体与顶推相结合施工的连续刚构桥结构，连续刚构桥为三跨或五跨，由主梁、桥墩和承台组成，主梁由悬臂施工梁段、中跨合龙梁段、边跨顶推梁段组成，主梁内设置预应力钢束，承台分为上承台和下承台，上、下承台内或之间设置转体球铰；边跨顶推梁段在非桥梁设计位置处制作，通过横向顶推或顺桥向顶推与悬臂施工梁段的梁端相接，预应力钢束穿过悬臂施工梁段与边跨顶推梁段。本实用新型与现有技术相比的优点在于：弥补了连续刚构桥悬臂浇筑法施工工期长、风险大、不可控因素众多等缺陷以及顶推施工应用的局限性。可在主梁转体后迅速与预制段进行连接。大量减少施工工期，减少逐段施工的复杂程度以及现场不安全因素。
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| GB/T 7714 | 请求不公布姓名 , 詹刚毅 , 范军琳 et al. 主梁转体与顶推相结合施工的连续刚构桥结构 : CN202222897912.6[P]. | 2022-11-01 00:00:00 . |
| MLA | 请求不公布姓名 et al. "主梁转体与顶推相结合施工的连续刚构桥结构" : CN202222897912.6. | 2022-11-01 00:00:00 . |
| APA | 请求不公布姓名 , 詹刚毅 , 范军琳 , 杨艳 , 郑裔 , 杨鸿渐 et al. 主梁转体与顶推相结合施工的连续刚构桥结构 : CN202222897912.6. | 2022-11-01 00:00:00 . |
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本实用新型公开了一种混凝土湿接连接的转体撑脚预制装配承台，包括上承台、下承台、上球铰、下球铰、撑脚预制构件、上下承台间填充混凝土，所述撑脚预制构件由钢管、灌注在钢管内部的混凝土柱体和包裹在钢管外侧的预制混凝土块组成，所述钢管外壁焊接数根栓钉，并布置螺旋钢筋，所述预制混凝土块通过栓钉和螺旋钢筋与钢管连接成整体。本实用新型优点在于：受力合理、强度高、施工便利，利用预制混凝土及界面连接钢筋将撑脚及球铰上转盘连成整体，可有效避免封盘混凝土与撑脚连接强度不够的问题，充分保证了钢混组合结构的整体性，有利于转体施工方法的发展与推广。
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| GB/T 7714 | 杨艳 , 詹刚毅 , 范军琳 et al. 一种混凝土湿接连接的转体撑脚预制装配承台 : CN202222897910.7[P]. | 2022-11-01 00:00:00 . |
| MLA | 杨艳 et al. "一种混凝土湿接连接的转体撑脚预制装配承台" : CN202222897910.7. | 2022-11-01 00:00:00 . |
| APA | 杨艳 , 詹刚毅 , 范军琳 , 韦建刚 , 范存智 , 杨鸿渐 et al. 一种混凝土湿接连接的转体撑脚预制装配承台 : CN202222897910.7. | 2022-11-01 00:00:00 . |
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本发明涉及一种钢管混凝土折边拱桥及施工方法，包括桥台、钢管混凝土拱架、桥面结构；钢管混凝土拱架为钢管混凝土折边拱结构，由沿桥宽方向交错布置的若干第一系统拱肋、第二系统拱肋交错布置组成；第一系统拱肋经钢管扣件连接相邻的钢管混凝土横梁B，第二系统拱肋经钢管扣件连接相邻的钢管混凝土横梁A；第一系统拱肋与第二系统拱肋的折角节点间夹持有安装在桥面结构底面的钢管混凝土横梁，使两系统组成整体，相互承托；本拱桥通过改变拱肋连接方式，将钢管拱实现以直代曲，并做到快速施工，具有强度高、刚度大、结构简洁、受力合理、使用寿命长、桥型优美等优点，极具推广研究与应用价值。
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| GB/T 7714 | 杨艳 , 严正力 , 赵秋 et al. 钢管混凝土折边拱桥及施工方法 : CN202111540777.3[P]. | 2021-12-16 00:00:00 . |
| MLA | 杨艳 et al. "钢管混凝土折边拱桥及施工方法" : CN202111540777.3. | 2021-12-16 00:00:00 . |
| APA | 杨艳 , 严正力 , 赵秋 , 陈鹏 , 辛梦琪 , 吴晓晴 et al. 钢管混凝土折边拱桥及施工方法 : CN202111540777.3. | 2021-12-16 00:00:00 . |
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本发明涉及一种通过分段钢筋连接的装配式混凝土连接构造，包括端部对接的两混凝土预制构件，所述混凝土预制构件的连接端内部均设置有预留孔道，所述混凝土预制构件内部的主钢筋均部分端头露出预留孔道的内孔底，两内孔底的主钢筋端头之间经位于预留孔道的多根分段连接钢筋连接，所述预留孔道内部均设置有水泥浆填充层，用以填充分段连接钢筋与预留孔道之间的空隙。本发明可用于装配式混凝土预制结构连接，特别是对于需要预制实现工厂工业化生产、现场直接拼装的混凝土结构，具有现场施工湿作业少、施工周期短、构件质量有保证、经济环保等优点，有良好的工程推广前景。
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| GB/T 7714 | 赵秋 , 胡坤煊 , 官润荣 et al. 通过分段钢筋连接的装配式混凝土连接构造及其施工方法 : CN202210034987.3[P]. | 2022-01-13 00:00:00 . |
| MLA | 赵秋 et al. "通过分段钢筋连接的装配式混凝土连接构造及其施工方法" : CN202210034987.3. | 2022-01-13 00:00:00 . |
| APA | 赵秋 , 胡坤煊 , 官润荣 , 陈萌佳 , 杨艳 . 通过分段钢筋连接的装配式混凝土连接构造及其施工方法 : CN202210034987.3. | 2022-01-13 00:00:00 . |
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本实用新型涉及一种装配化UHPC‑RC组合转体上承台实腹式转盘，包括UHPC外模壳和RC内核心，所述的UHPC外模壳由多块尺寸相同的UHPC异形结构装配组成，所述UHPC异形结构包括UHPC竖板、UHPC底板、UHPC撑脚外壳与UHPC加劲肋，所述UHPC竖板均呈弧形且相邻间相互拼接组成转盘的竖环，所述UHPC底板均呈扇形其外端弧面与UHPC竖板固连为一体，相邻UHPC底板间同拼接组成转盘的底板，所述UHPC加劲肋固设在UHPC竖板与UHPC底板内壁交接处，UHPC撑脚外壳固设在UHPC底板底部同经拼接组成转盘的撑脚外壳，所述转盘的竖环、底板和撑脚外壳内绑扎钢筋并进行混凝土浇筑，形成UHPC‑RC组合的实腹式转盘，该实用新型结构简单，施工方便且不需要转盘的模板工程量而节省大量劳力。
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| GB/T 7714 | 苏家战 , 苏子辰 , 杨艳 et al. 一种装配化UHPC-RC组合转体上承台实腹式转盘 : CN202321580966.8[P]. | 2023-06-20 00:00:00 . |
| MLA | 苏家战 et al. "一种装配化UHPC-RC组合转体上承台实腹式转盘" : CN202321580966.8. | 2023-06-20 00:00:00 . |
| APA | 苏家战 , 苏子辰 , 杨艳 , 赵秋 . 一种装配化UHPC-RC组合转体上承台实腹式转盘 : CN202321580966.8. | 2023-06-20 00:00:00 . |
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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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In order to study the mechanical performance of UHPC under triaxial compression, the conventional triaxial experiment was carried out to analyse the mechanical properties such as the failure modes, stress-strain curve, peak stress and strain by considering the confining pressure and steel fiber content as experimental parameters. The results show that: the specimens without confining pressure and steel fiber exhibit splitting failure, while the others exhibit shear failure. The elastic modulus and elastic segment curve shape of the stress-strain curves remain unchanged as confining pressure and steel fiber content change. With the increase of confining pressure, the peak stress and strain increase continuously. With the increase of steel fiber content, the peak stress increases firstly and then remains unchanged and the axial peak strain increases firstly and then decreases, while the hoop peak strain increases. Based on the Drucker-Prager two parameter criterion, the octahedron failure criterion calculation method of UHPC was established by analyzing its octahedron normal stress, volume strain relationship and, its octahedron shear stress and shear strain relationship. © 2023 Tsinghua University. All rights reserved.
Keyword ：
confining pressure confining pressure failure mode failure mode octahedral failure criterion octahedral failure criterion steel fiber content steel fiber content stress-strain curve stress-strain curve
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| GB/T 7714 | Zhou, J. , Wei, J.-G. , Yang, Y. et al. RESEARCH ON MECHANICAL PROPERTIES OF UHPC UNDER TRAXIAL COMPRESSION; [UHPC 三轴受压力学性能研究] [J]. | Engineering Mechanics , 2023 , 40 (11) : 206-217and226 . |
| MLA | Zhou, J. et al. "RESEARCH ON MECHANICAL PROPERTIES OF UHPC UNDER TRAXIAL COMPRESSION; [UHPC 三轴受压力学性能研究]" . | Engineering Mechanics 40 . 11 (2023) : 206-217and226 . |
| APA | Zhou, J. , Wei, J.-G. , Yang, Y. , Chen, B.-C. , Huang, Y. . RESEARCH ON MECHANICAL PROPERTIES OF UHPC UNDER TRAXIAL COMPRESSION; [UHPC 三轴受压力学性能研究] . | Engineering Mechanics , 2023 , 40 (11) , 206-217and226 . |
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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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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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