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学者姓名：黄新艺
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Abstract ：
Based on the prototype tall pier bridge on Jingtai Highway, one new composite tall pier is designed. By utilizing the finite element software, the solid models are established for the nonlinear stability analysis of the tall pier under the cantilever stage, and the beam model for the pier after construction. Then, the stability capacity and coefficients were obtained. The parametric analysis was carried out to investigate the influence of thickness, of the yield point of LYP steel plate, of the height of specimens and, of the distance of a tie beam. Numerical calculations show that: unbalanced cantilever construction stage is the most unfavorable condition for the bridge, and the failure mode is compression-bending in longitude. The stability coefficient decreases by 30% compared with the balanced cantilever construction. Under different working conditions, the maximum strain of steel tubes occurred around 0.1~0.2 height of the CFST column on the compression side. With the increase of the slenderness ratio of the pier, the stability decreases significantly, and the failure mode gradually transforms from elastoplastic instability to elastic instability. The increase in the thickness of the LYP steel plate is beneficial to the improvement of the stability. It is favorable for the stability of the pier that the distance of tie beams is designed according to the experience of conventional tall piers, i.e. 10 m~12 m. Based on the parametric analysis, proposed are a new simplified model for new composite tall piers and formulas for calculating the stability capacity. The theoretical calculation results are in a good agreement with the numerical results when the slenderness ratio of the tall pier more than 70. When the slenderness ratio less than 70, it is accepted to calculate the stability capacity by the reduction of the bearing capacity of stocky columns. © 2025 Tsinghua University. All rights reserved.
Keyword ：
Bridge piers Bridge piers Cantilever beams Cantilever beams Cantilever bridges Cantilever bridges Composite bridges Composite bridges Plates (structural components) Plates (structural components) Tubular steel structures Tubular steel structures
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| GB/T 7714 | Cai, Zhe-Han , Zhuo, Wei-Dong , Wang, Zhi-Jian et al. STABILITY OF CONCRETE-FILLED STEEL TUBULAR COLUMN-LYP STEEL PLATE COMPOSITE TALL PIER IN CONSTRUCTION AND SERVICE STAGES [J]. | Engineering Mechanics , 2025 , 42 (2) : 216-228 . |
| MLA | Cai, Zhe-Han et al. "STABILITY OF CONCRETE-FILLED STEEL TUBULAR COLUMN-LYP STEEL PLATE COMPOSITE TALL PIER IN CONSTRUCTION AND SERVICE STAGES" . | Engineering Mechanics 42 . 2 (2025) : 216-228 . |
| APA | Cai, Zhe-Han , Zhuo, Wei-Dong , Wang, Zhi-Jian , Huang, Xin-Yi , Liu, Qiu-Jiang . STABILITY OF CONCRETE-FILLED STEEL TUBULAR COLUMN-LYP STEEL PLATE COMPOSITE TALL PIER IN CONSTRUCTION AND SERVICE STAGES . | Engineering Mechanics , 2025 , 42 (2) , 216-228 . |
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以京台高速公路某大桥为工程背景，设计了相应的新型组合高墩。通过有限元方法，考虑包括材料与几何非线性，分别采用实体单元建立了针对高墩悬臂施工阶段的模型，以及梁单元建立了全桥运营阶段模型分析其稳定性，获得其稳定承载力以及稳定系数。通过有限元参数分析，探讨了不同工况、墩身高度、软钢板厚度、屈服强度以及系梁间距对高墩稳定性的影响。计算结果表明，悬臂不平衡施工为最不利工况，组合高墩发生纵桥向压弯变形失稳，该阶段高墩的稳定系数相较悬臂平衡施工阶段下降30%。不同工况下，墩身的最不利截面处于受压侧钢管混凝土柱距离墩底0.1~0.2高度区域；随着墩身长细比增大，稳定系数出现显著下降，其破坏模式由弹塑性失稳逐渐转变为弹性失稳；软钢板厚度增大有利于稳定系数的提高；系梁间距按照传统高墩经验设计，取10 m~12 m最有利高墩稳定。基于参数分析结果，提出新型组合高墩简化模型，所得到的稳定承载力计算方法，适用于长细比超过70的组合高墩；当长细比小于70，建议采用短柱极限承载力折减方法计算。
Keyword ：
参数分析 参数分析 桥梁工程 桥梁工程 稳定 稳定 简化模型 简化模型 组合高墩 组合高墩
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| GB/T 7714 | 蔡哲罕 , 卓卫东 , 王志坚 et al. 钢管混凝土柱-软钢板组合高墩施工与运营阶段的稳定性 [J]. | 工程力学 , 2025 , 42 (2) : 216-228 . |
| MLA | 蔡哲罕 et al. "钢管混凝土柱-软钢板组合高墩施工与运营阶段的稳定性" . | 工程力学 42 . 2 (2025) : 216-228 . |
| APA | 蔡哲罕 , 卓卫东 , 王志坚 , 黄新艺 , 刘秋江 . 钢管混凝土柱-软钢板组合高墩施工与运营阶段的稳定性 . | 工程力学 , 2025 , 42 (2) , 216-228 . |
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Photocatalytic technology offers broad applications in the treatment of cyanobacterial blooms. This study successfully synthesized a series of highly efficient Ag2MoO4/ZnSnO3 photocatalysts through a straightforward hydrothermal method. Among the synthesized photocatalysts, the 35 % Ag2MoO4-doped Ag2MoO4/ZnSnO3 exhibited the highest photocatalytic activity, achieving nearly 100 % algal removal within 3 h under visible light irradiation. This composite also displays excellent reusability and chemical stability, offering a more effective and sustainable solution compared to traditional methods such as chemical coagulation or physical filtration. The exceptional efficiency results from the potent oxidative capabilities of various reactive oxygen species, which are generated through the efficient Z-scheme electron transfer mechanism facilitated by Ag2MoO4/ZnSnO3. Upon photocatalytic process of Ag2MoO4/ZnSnO3, some algal cells became destabilized and sedimented, with visibly damaged cell walls. In the initial stage, the photosynthetic system was inhibited, a critical factor leading to algal cell death. The accumulation of reactive oxygen species (ROS) induced oxidative damage, leading to the collapse of the antioxidant system, cell rupture, and continuous leakage of intracellular electrolytes (K+, Ca2+, Mg2+), organic matter, and proteins. Even after five consecutive cycles, the Ag2MoO4/ZnSnO3 photocatalyst maintained an algae removal rate above 95 %, demonstrating excellent reusability and stability. In conclusion, Ag2MoO4/ ZnSnO3, as a stable and efficient photocatalyst, presents a promising approach for mitigating harmful algal blooms.
Keyword ：
Ag2MoO4/ZnSnO3 Ag2MoO4/ZnSnO3 Microcystis aeruginosa Microcystis aeruginosa Photocatalysis Photocatalysis Z -scheme heterojunction Z -scheme heterojunction
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| GB/T 7714 | Fan, Gongduan , Xu, Zongqiong , Lin, Bin et al. Efficient inactivation of Microcystis aeruginosa using Z-scheme heterojunction Ag2MoO4/ZnSnO3 photocatalysts: Synthesis, mechanism, and reusability [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2025 , 362 . |
| MLA | Fan, Gongduan et al. "Efficient inactivation of Microcystis aeruginosa using Z-scheme heterojunction Ag2MoO4/ZnSnO3 photocatalysts: Synthesis, mechanism, and reusability" . | SEPARATION AND PURIFICATION TECHNOLOGY 362 (2025) . |
| APA | Fan, Gongduan , Xu, Zongqiong , Lin, Bin , Wu, Xinyi , Huang, Yuzhou , Luo, Jing et al. Efficient inactivation of Microcystis aeruginosa using Z-scheme heterojunction Ag2MoO4/ZnSnO3 photocatalysts: Synthesis, mechanism, and reusability . | SEPARATION AND PURIFICATION TECHNOLOGY , 2025 , 362 . |
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The load transfer mechanism and failure mode of narrow soils induced by rotating about the top of excavation retaining structures (RT displacement mode) are investigated using the Finite Element Limit Analysis (FELA) method with the Hardening Mohr-Coulomb (HMC) model. A logarithmic spiral curve model is innovatively proposed to accurately characterize the evolution of the failure surface in narrow soils behind retaining structures under RT displacement mode based on numerical simulation results. Through analysis of principal stress vector diagrams obtained from FELA simulations, an asymmetric soil arching effect is identified in the upper zone of the narrow soils behind the retaining structure. An optimized differential element method is developed by constructing asymmetric arched differential elements along the deflection of principal stresses at the soil's limit state, thereby establishing an analytical framework for calculating earth pressure in narrow soils under RT displacement mode. The proposed analytical method is validated through favorable agreement with finite element analysis results. Additionally, sensitivity analyses are performed to evaluate the effects of soil strength parameters, interface friction angles, and aspect ratios on earth pressure distribution, earth pressure coefficients, and the location of the resultant thrust. © 2025 Elsevier Ltd
Keyword ：
Failure modes Failure modes Fracture mechanics Fracture mechanics Sensitivity analysis Sensitivity analysis Trenching Trenching
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| GB/T 7714 | Huang, Xin-yi , Chen, Chang , Chen, Fu-quan et al. Earth pressure on rotating-about-top excavation retaining walls adjacent to existing structures [J]. | Computers and Geotechnics , 2025 , 185 . |
| MLA | Huang, Xin-yi et al. "Earth pressure on rotating-about-top excavation retaining walls adjacent to existing structures" . | Computers and Geotechnics 185 (2025) . |
| APA | Huang, Xin-yi , Chen, Chang , Chen, Fu-quan , Kuang, Yi-xing . Earth pressure on rotating-about-top excavation retaining walls adjacent to existing structures . | Computers and Geotechnics , 2025 , 185 . |
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With the convenient and fast requirements for construction in bridge engineering, prefabricated assembly technology is widely applied in engineering construction. Typically, prefabricated bridge decks are connected through cast-in-place wet joints. Wet joints, as the primary load-bearing parts of bridge decks, undergo complex stress and are prone to cracking and damage. Particularly in the negative bending moment region of bridges, the influence of tensile stress on wet joints is more severe, thus enhancing the mechanical performance and crack resistance of joints becomes crucial. This paper investigates the mechanical behavior of prefabricated reinforced concrete bridge deck panels with variable cross-sections under negative bending moments, focusing on the performance of Ultra High-Performance Concrete (UHPC) wet joints. Full-scale experimental tests were conducted on a 176 m steel truss composite continuous rigid bridge, employing C50 concrete panels with UHPC wet joints. Results show three distinct stages: elastic, crack initiation and propagation, and failure. The maximum failure load reached 822 kN, with a maximum displacement of 21.64 mm. Concrete strains indicate compressive stress near the wet joint and tensile stress near the loading positions. Cracks primarily develop at the wet joint interface and propagate under increasing load, ultimately leading to flexural-shear failure near the variable cross-section of the wet joint. Numerical simulations using ABAQUS/CAE (2020) corroborate experimental findings, closely matching load-displacement curves and identifying damage locations. The study demonstrates that UHPC wet joints significantly enhance crack resistance, meeting design requirements for improved mechanical performance in bridge structures subjected to negative bending moments.
Keyword ：
experimental study experimental study force properties force properties numerical analysis numerical analysis precast bridge deck precast bridge deck ultra-high-performance concrete ultra-high-performance concrete wet joints wet joints
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| GB/T 7714 | Hu, Jiaqi , Gu, Yin , Yan, Jinhuang et al. Experimental Study on Flexural Resistance of UHPC Wet Joint Precast Reinforced Concrete Bridge Deck Slabs with Variable Cross-Section [J]. | APPLIED SCIENCES-BASEL , 2024 , 14 (7) . |
| MLA | Hu, Jiaqi et al. "Experimental Study on Flexural Resistance of UHPC Wet Joint Precast Reinforced Concrete Bridge Deck Slabs with Variable Cross-Section" . | APPLIED SCIENCES-BASEL 14 . 7 (2024) . |
| APA | Hu, Jiaqi , Gu, Yin , Yan, Jinhuang , Sun, Ying , Huang, Xinyi . Experimental Study on Flexural Resistance of UHPC Wet Joint Precast Reinforced Concrete Bridge Deck Slabs with Variable Cross-Section . | APPLIED SCIENCES-BASEL , 2024 , 14 (7) . |
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To improve the seismic performance of bridges with tall piers, a composite box tall pier with replaceable components is proposed, based on design the concept of earthquake resilient structures. The composite tall pier composes of four concrete-filled steel tubular (CFST) columns and low-yield-point (LYP) steel plates. Axial and eccentric compression tests on a set of specimens were conducted to investigate the bearing capacity of composite tall piers, and their axial load-displacement curves, axial load-strain curves and failure modes were obtained. Based on the verified finite element model, parametric analysis was carried out to investigate the influence of load eccentricity, of the slenderness ratio of specimens and, of the thickness of LYP steel plate on the compressive bearing capacity. The results showed that: both the composite tall piers under axial and eccentric loads exhibited obvious in-plane bending, and the failure modes were global elastic-plastic instability. As eccentricity ratio increased from 0 to 0.54, or slenderness ratio increased from 4 to 79, the compressive capacity decreased by 49% and 38%, respectively. The influence of eccentricity and slenderness ratio was essentially independent of each other. As the thickness of LYP steel plate increased from 1mm to 10mm, the axial bearing capacity only increased by 9.5%, and the eccentric bearing capacity increased by about 25%. Supposed the composite tall pier could be simplified as a lattice column composed of CFST columns and steel beams, a calculation formula for the axial compressive capacity was proposed, considering the restraint effects of LYP steel plates on the columns and the steel beams. The calculation formula for the eccentric compressive capacity was proposed with the reduction coefficient, which could be expressed as a product of the reduction coefficients of stability and eccentricity ratio. The theoretical calculation results are in a good agreement with the test results and numerical results, which shows that the proposed calculation formula can be used for the calculation of the compressive capacity of composite tall piers. © 2024 Tsinghua University. All rights reserved.
Keyword ：
Axial loads Axial loads Bearing capacity Bearing capacity Bearings (machine parts) Bearings (machine parts) Bridges Bridges Compression testing Compression testing Ductile fracture Ductile fracture Earthquakes Earthquakes Elastoplasticity Elastoplasticity Piers Piers Plates (structural components) Plates (structural components) Seismic design Seismic design Steel beams and girders Steel beams and girders
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| GB/T 7714 | Cai, Zhe-Han , Zhuo, Wei-Dong , Wang, Zhi-Jian et al. COMPRESSIVE BEARING CAPACITY OF COMPOSITE TALL PIER COMPOSED OF CONCRETE-FILLED STEEL TUBULAR COLUMN AND SOFT STEEL PLATE [J]. | Engineering Mechanics , 2024 , (3) : 150-162 . |
| MLA | Cai, Zhe-Han et al. "COMPRESSIVE BEARING CAPACITY OF COMPOSITE TALL PIER COMPOSED OF CONCRETE-FILLED STEEL TUBULAR COLUMN AND SOFT STEEL PLATE" . | Engineering Mechanics 3 (2024) : 150-162 . |
| APA | Cai, Zhe-Han , Zhuo, Wei-Dong , Wang, Zhi-Jian , Huang, Xin-Yi , Liu, Qiu-Jiang . COMPRESSIVE BEARING CAPACITY OF COMPOSITE TALL PIER COMPOSED OF CONCRETE-FILLED STEEL TUBULAR COLUMN AND SOFT STEEL PLATE . | Engineering Mechanics , 2024 , (3) , 150-162 . |
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抗侧刚度是高墩设计中需要关注的构件基本性能之一.通过4个试件的低周往复水平荷载试验,初步研究了轴压比和软钢板相对高厚比对新型可更换部件的矩形钢管混凝土柱-软钢板组合箱形截面高墩抗侧刚度的影响.试验结果表明:在弹性阶段,新型组合高墩试件具有较大的初始抗侧刚度,可满足高墩对墩顶位移量的控制要求;软钢板发生弹塑性屈曲后,试件的抗侧刚度下降32％～53％.利用试验结果对新型组合高墩有限元模型进行验证,以验证后的有限元模型为基础进行参数拓展分析,探讨影响新型组合高墩抗侧刚度的关键因素.参数分析结果表明:轴压比、软钢板相对高厚比及其屈服强度对高墩的初始弹性抗侧刚度几乎没有影响;软钢板发生弹塑性屈曲后的高墩抗侧刚度与软钢板相对高厚比密切相关,当软钢板相对高厚比由200降至100时,屈曲抗侧刚度和最小抗侧刚度分别增加37％和48％.将新型组合高墩简化为由软钢板连接的多肢钢管混凝土柱,分别推导建立了适用于新型组合高墩初始弹性抗侧刚度和屈曲抗侧刚度的实用计算公式,理论计算结果与试验结果和有限元计算结果吻合良好;当软钢板属于中厚板或厚板时,后者计算公式可用于估算大震后新型组合高墩的抗侧刚度.
Keyword ：
参数分析 参数分析 实用计算公式 实用计算公式 抗侧刚度 抗侧刚度 桥梁工程 桥梁工程 组合高墩 组合高墩
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| GB/T 7714 | 蔡哲罕 , 卓卫东 , 王志坚 et al. 矩形钢管混凝土柱-软钢板组合高墩的抗侧刚度 [J]. | 中国公路学报 , 2024 , 37 (8) : 158-169 . |
| MLA | 蔡哲罕 et al. "矩形钢管混凝土柱-软钢板组合高墩的抗侧刚度" . | 中国公路学报 37 . 8 (2024) : 158-169 . |
| APA | 蔡哲罕 , 卓卫东 , 王志坚 , 黄新艺 , 刘秋江 . 矩形钢管混凝土柱-软钢板组合高墩的抗侧刚度 . | 中国公路学报 , 2024 , 37 (8) , 158-169 . |
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Lateral stiffness is a basic component property in the design of a tall pier. To investigate the effects of axial compression ratio and relative height to thickness ratio of a low-yield-point (LYP) steel plate on the lateral stiffness of an innovative tall pier with rectangular concrete-filled steel tubular (CFST) columns and a replaceable LYP steel plate composite box section, quasi-static cyclic tests were conducted on four tall pier specimens. The preliminary test results indicate that the specimens with composite box sections have sufficient initial lateral stiffness to meet the displacement limit requirement at the top of the tall piers during the elastic stage, and the lateral stiffness might decrease by 32%-53% when clastic-plastic buckling occurs in the LYP steel plates. Furthermore, extensive parametric analyses were conducted to explore the influence of the key factors on the lateral stiffness of the tall piers with composite box sections by verified finite element models. The parametric analysis shows that axial compression ratio and both relative height-thickness ratio and yield strength of the LYP steel plate have little effect on the initial elastic lateral stiffness; the post-buckling lateral stiffness is closely related to the relative height-thickness ratio of the LYP steel plate: when the relative height to thickness ratio decreases from 200 to 100, the buckling and the minimum lateral stiffnesses increase by 37% and 48%, respectively. By simplifying the tall pier with a composite box section as that with multiple CFST columns linked by LYP steel plates, the practical formulas for the initial elastic and buckling lateral stiffnesses were established, respectively. The theoretical calculation results agree well with the experimental and numerical results, and the latter can be used to estimate the minimum lateral stiffness of the tall pier with medium or thick LYP steel plates after a severe earthquake ground motion input. © 2024 Chang'an University. All rights reserved.
Keyword ：
Bridge piers Bridge piers Buckling Buckling Tubular steel structures Tubular steel structures
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| GB/T 7714 | Cai, Zhe-Han , Zhuo, Wei-Dong , Wang, Zhi-Jian et al. Lateral Stiffness of Rectangular Concrete-filled Steel Tubular Columns and Low-yield-point Steel Plate Composite Tall Pier [J]. | China Journal of Highway and Transport , 2024 , 37 (8) : 158-169 . |
| MLA | Cai, Zhe-Han et al. "Lateral Stiffness of Rectangular Concrete-filled Steel Tubular Columns and Low-yield-point Steel Plate Composite Tall Pier" . | China Journal of Highway and Transport 37 . 8 (2024) : 158-169 . |
| APA | Cai, Zhe-Han , Zhuo, Wei-Dong , Wang, Zhi-Jian , Huang, Xin-Yi , Liu, Qiu-Jiang . Lateral Stiffness of Rectangular Concrete-filled Steel Tubular Columns and Low-yield-point Steel Plate Composite Tall Pier . | China Journal of Highway and Transport , 2024 , 37 (8) , 158-169 . |
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To investigate the patterns of wave pressure exerted on the superstructure and substructure of offshore boxgirder bridges under the influence of tsunamis, a scale model of 1:25 for both the pier-girder and pier model was constructed for tsunami wave impact testing. The study examined pressure and flow field characteristics at various locations on the box girders and piers under different tsunami wave conditions, analyzing the interaction and mechanisms of tsunami impact pressures between the girders and piers, as well as the effect of impact submersion coefficients on these pressures. The findings indicate significant variations in the degree to which different parts of the box girder are affected, with notably higher pressure at the Girder-Pier Connection (GPC) of the girder's bottom compared to other areas, reaching a differential of 16%. Under conditions where the pier is not submerged, the peak pressure at the top of the pier in the pier-girder model was found to be 40% higher than in the pier-only model. Therefore, ignoring the interaction between girders and piers can lead to an underestimation of the pressures caused by tsunami waves. This research is crucial for identifying bridge failure modes and developing mitigation and protection measures.
Keyword ：
Flow field characteristics Flow field characteristics Impact submersion coefficients Impact submersion coefficients Offshore box-girder bridges Offshore box-girder bridges Pressure Pressure Tsunami Tsunami
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| GB/T 7714 | Yu, Anhua , Gu, Yin , Lai, Xiaohe et al. Experimental study on tsunami impact on offshore box-girder bridges [J]. | OCEAN ENGINEERING , 2024 , 314 . |
| MLA | Yu, Anhua et al. "Experimental study on tsunami impact on offshore box-girder bridges" . | OCEAN ENGINEERING 314 (2024) . |
| APA | Yu, Anhua , Gu, Yin , Lai, Xiaohe , Huang, Xinyi . Experimental study on tsunami impact on offshore box-girder bridges . | OCEAN ENGINEERING , 2024 , 314 . |
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本实用新型涉及一种可移动伸缩的钢筋存放架，包括两块承载板，两承载板通过中间的调节伸缩杆连接在一起；所述承载板底部安装有脚轮，承载板上侧固定连接有竖直支撑架，所述竖直支撑架上固定连接有若干向上翘起一定角度的钢筋支撑梁，两侧竖直支撑架上的钢筋支撑梁位置一一对应。该可移动伸缩的钢筋存放架使用方便，实用性强，不仅能够实现对钢筋的快速存放，而且能够实现对各种规格型号的钢筋进行分类，避免了钢筋使用错误的情况，有利于快速取用；通过调整调节伸缩杆的长度能够调节两侧竖直支撑架之间的距离，以适应不同规格长度的钢筋存放，通用性强。
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| GB/T 7714 | 黄新艺 , 吴宏伟 , 谷音 . 一种可移动伸缩的钢筋存放架 : CN202222678943.2[P]. | 2022-10-12 00:00:00 . |
| MLA | 黄新艺 et al. "一种可移动伸缩的钢筋存放架" : CN202222678943.2. | 2022-10-12 00:00:00 . |
| APA | 黄新艺 , 吴宏伟 , 谷音 . 一种可移动伸缩的钢筋存放架 : CN202222678943.2. | 2022-10-12 00:00:00 . |
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