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学者姓名：吴兆旗
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Abstract ：
The connection between offshore wind power foundation structures and steel pipe piles is usually carried out by grouting. With the development of offshore wind power to deep sea, the grouting connection between wind power foundation and steel pipe piles is deeper and deeper in underwater position. To determine the influence of seawater pressure on the basic mechanical properties of grouting material, the grouting material specimens were placed in a pressure vessel for curing, and then their basic mechanical properties such as compressive strength, flexural strength, and elastic modulus were tested. In addition, the phase composition and microstructure were analyzed by X-ray diffractometer and scanning electron microscope. The results show that the compressive strength of grouting material is improved after curing under a pressure environment. Seawater pressure does not produce a “wedging” effect, but further improves the compactness of grouting material. When the seawater pressure increases from 0 MPa to 0. 75 MPa, the compressive strength, flexural strength, and elastic modulus of grouting material increase by 10. 7%, 2. 9%, and 16. 7%, respectively. Seawater pressure does not change the phase composition of grouting material, but reduces its internal porosity and increases its compactness, thus improving its mechanical properties. © 2024 Bulletin of the Chinese Ceramic Society Press. All rights reserved.
Keyword ：
grouting material grouting material mechanical property mechanical property microstructure microstructure offshore wind power offshore wind power phase composition phase composition seawater pressure seawater pressure
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| GB/T 7714 | Jiang, G. , Li, Z. , Zhou, X. et al. Basic Mechanical Properties of Grouting Material for Offshore Wind Power Foundation under Different Seawater Pressures; [不同海水压力下海上风电基础用灌浆料的基本力学性能] [J]. | Bulletin of the Chinese Ceramic Society , 2024 , 43 (11) : 4055-4060and4082 . |
| MLA | Jiang, G. et al. "Basic Mechanical Properties of Grouting Material for Offshore Wind Power Foundation under Different Seawater Pressures; [不同海水压力下海上风电基础用灌浆料的基本力学性能]" . | Bulletin of the Chinese Ceramic Society 43 . 11 (2024) : 4055-4060and4082 . |
| APA | Jiang, G. , Li, Z. , Zhou, X. , Zhang, K. , Wu, Z. . Basic Mechanical Properties of Grouting Material for Offshore Wind Power Foundation under Different Seawater Pressures; [不同海水压力下海上风电基础用灌浆料的基本力学性能] . | Bulletin of the Chinese Ceramic Society , 2024 , 43 (11) , 4055-4060and4082 . |
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Abstract ：
海上风电基础结构与钢管桩之间通常采用灌浆方式进行连接。随着海上风电向深远海发展，风电基础结构与钢管桩灌浆连接在水下的应用位置越来越深。为明确海水压力对灌浆料基本力学性能的影响，将灌浆料试件置于压力容器养护后，进行抗压强度、抗折强度、弹性模量等基本力学性能测试，并利用X射线衍射仪、扫描电子显微镜等分析了物相组成和微观结构。结果表明：经过压力环境养护后，灌浆料抗压强度提高；海水压力不但不会产生“楔入”作用，反而进一步提高了灌浆料的密实度；当海水压力从0 MPa增大到0.75 MPa时，灌浆料的抗压强度、抗折强度、弹性模量分别增大了10.7%、2.9%、16.7%;海水压力不会改变灌浆料的物相组成，但是会降低内部孔隙率，增大密实度，从而提高其力学性能。
Keyword ：
力学性能 力学性能 微观结构 微观结构 海上风电 海上风电 海水压力 海水压力 灌浆料 灌浆料 物相组成 物相组成
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| GB/T 7714 | 蒋光遒 , 李智 , 周兴政 et al. 不同海水压力下海上风电基础用灌浆料的基本力学性能 [J]. | 硅酸盐通报 , 2024 , 43 (11) : 4055-4060,4082 . |
| MLA | 蒋光遒 et al. "不同海水压力下海上风电基础用灌浆料的基本力学性能" . | 硅酸盐通报 43 . 11 (2024) : 4055-4060,4082 . |
| APA | 蒋光遒 , 李智 , 周兴政 , 张阔纪 , 吴兆旗 . 不同海水压力下海上风电基础用灌浆料的基本力学性能 . | 硅酸盐通报 , 2024 , 43 (11) , 4055-4060,4082 . |
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The behavior of Shallow Steel-beam-Concrete Composite (SSCC) decks, made of steel beam connected to concrete, is the object of this study. Emphasis is placed on the effect that different Steel-beam-Concrete (SC) bonding measures and techniques have on the composite action. An extensive review of several experimental tests showed that the SC bonding force consists of two components: one deriving from the direct steel-concrete adhesion in the compression zone and one dependent on the adopted SC bonding technique. The effectiveness of such SC bonding techniques, which varies from negligible to full composite action (FCA), has been assessed by comparing the experimental tests with numerical simulations having FCA. The closer the test result to the FCA result, the more effective the adopted SC bonding technique. Analytical equations for the bending capacity at yield and ultimate of SSCC decks with FCA have been developed, meant to be adopted in design.
Keyword ：
Composite action Composite action Composite slim floor beam Composite slim floor beam Flexural capacity Flexural capacity Shallow Steel-Beam-Concrete Composite decks Shallow Steel-Beam-Concrete Composite decks Shear connections Shear connections Web openings Web openings
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| GB/T 7714 | Lin, Zhou , Monti, Giorgio , Wu, Zhao-qi . Composite action in Shallow Steel-beam-Concrete Composite decks [J]. | ENGINEERING STRUCTURES , 2023 , 286 . |
| MLA | Lin, Zhou et al. "Composite action in Shallow Steel-beam-Concrete Composite decks" . | ENGINEERING STRUCTURES 286 (2023) . |
| APA | Lin, Zhou , Monti, Giorgio , Wu, Zhao-qi . Composite action in Shallow Steel-beam-Concrete Composite decks . | ENGINEERING STRUCTURES , 2023 , 286 . |
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This paper uses ABAQUS software to perform finite element simulation on eccentric compression member of corroded circular steel tubes strengthened by FRP tube grouting. The working mechanisms, failure mode and the lifting of mechanical properties are investigated. The results show that the load-displacement curve of the member represents both bilinear and trilinear models. The former is in the overall buckling failure mode, while the latter is in the strength failure mode of the circular steel tube with bare ends. After strengthening, the bearing capacity increases by up to 114.99%. Moreover, the increase positively correlates with corrosion rate, grouting thickness, and FRP tube thickness. It first decreases before increasing as the slenderness ratio changes, while the concrete strength has little effect. At the same time, the bound flexural stiffness ratio is derived and provides reference suggestions for the practical engineering application of FRP tube grouting to strengthen corroded steel structures.
Keyword ：
Bound flexural stiffness ratio Bound flexural stiffness ratio Corrosion rate Corrosion rate Finite element analysis Finite element analysis FRP tube grouting FRP tube grouting Mechanical performance lifting Mechanical performance lifting
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| GB/T 7714 | Fu, Hao , Zhao, Huanhuan , Pan, Zhiyong et al. Behaviour of corroded circular steel tube strengthened with external FRP tube grouting under eccentric loading: Numerical study [J]. | STRUCTURES , 2023 , 56 . |
| MLA | Fu, Hao et al. "Behaviour of corroded circular steel tube strengthened with external FRP tube grouting under eccentric loading: Numerical study" . | STRUCTURES 56 (2023) . |
| APA | Fu, Hao , Zhao, Huanhuan , Pan, Zhiyong , Wu, Zhaoqi , Chin, Chee-Loong , Ma, Chau-Khun . Behaviour of corroded circular steel tube strengthened with external FRP tube grouting under eccentric loading: Numerical study . | STRUCTURES , 2023 , 56 . |
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Abstract ：
本实用新型涉及一种便于维护的输电铁塔塔脚构造，包括输电塔的主材角钢、斜材角钢以及设置于主材角钢下部的塔脚结构，塔脚结构包括塔脚底板以及设置在塔脚底板上的塔脚主靴板结构，主材角钢与塔脚主靴板结构上部之间、斜材角钢与塔脚主靴板结构侧部之间经多个连接螺栓连接，塔脚底板上设有多个用以将塔脚结构固定于地面基础上的地脚螺栓，地脚螺栓外部设有混凝土保护帽，用以将位于斜材角钢下方的塔脚结构下部包裹起来。本实用新型结构简单，设计巧妙，使用方便，通过合理设置减少主材角钢、斜材角钢的锈蚀，从而免于更换，同时塔脚主靴板结构与主材角钢、斜材角钢之间经连接螺栓连接，且该连接处靠近地面基础，更换维护十分方便。
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| GB/T 7714 | 韩纪层 , 林德源 , 洪毅成 et al. 一种便于维护的输电铁塔塔脚构造 : CN202223134802.0[P]. | 2022-11-25 00:00:00 . |
| MLA | 韩纪层 et al. "一种便于维护的输电铁塔塔脚构造" : CN202223134802.0. | 2022-11-25 00:00:00 . |
| APA | 韩纪层 , 林德源 , 洪毅成 , 吴兆旗 , 夏晓健 , 严康骅 et al. 一种便于维护的输电铁塔塔脚构造 : CN202223134802.0. | 2022-11-25 00:00:00 . |
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Fatigue analysis of hybrid wind turbine towers between cut in wind speed and cut out wind speed are demonstrated. Nominal stress method and miner liner accumulated damage theory are adopted. Through the analysis of the results, comparative research on effect of parameters of aspect ratio, height ratio and unequal legs for fatigue properties of hybrid wind turbine towers. The results show that the optimal range of aspect ratio of hybrid towers is 1/6-1/4, the optimal range of height ratio of hybrid towers is 0.60-0.67. Fatigue analysis of hybrid towers, should select the right junction of leeward towers and the S-N curve from EN 1993-1-9.The effect of unequal legs for fatigue properties of hybrid towers can be neglected. © 2023 EDP Sciences. All rights reserved.
Keyword ：
Design load spectrum Design load spectrum Fatigue property Fatigue property Finite element analysis. Finite element analysis. Hybrid tower Hybrid tower Wind power generation Wind power generation
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| GB/T 7714 | Wei, Y. , Li, Y. , Wu, Z. et al. Fatigue analysis of hybrid wind turbine towers [未知]. |
| MLA | Wei, Y. et al. "Fatigue analysis of hybrid wind turbine towers" [未知]. |
| APA | Wei, Y. , Li, Y. , Wu, Z. , Chen, J. , Jiang, S. , Xiao, X. . Fatigue analysis of hybrid wind turbine towers [未知]. |
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There is no standard for rock-socketed pile foundation of offshore wind farm at China and abroad. According to the practical geological and environmental conditions of offshore wind power plant, response of rock-socketed pile under horizontal load was analyzed by using a finite element software, ABAQUS. Then, the parameters of rock-socketed pile, i.e. depth, pile diameter, ratio of pile diameter to thickness, and grouting thickness were investigated by orthogonal analysis and parametric analysis. It is found that the thickness of grouting has little influence on the displacement of pile head. The diameter and the ration of diameter to thickness of pile, rock-socketed depth have significant influence. The displacement of pile tip tends to stable and the bending moment at bottom of pile become zero when the rock-socketed depth reaches 3dp. The maximum Tresca stress of grouting body and 1st principal stress of rock mass decrease with an increase of rock-socketed depth. © Published under licence by IOP Publishing Ltd.
Keyword ：
ABAQUS ABAQUS Bearing capacity Bearing capacity Concrete construction Concrete construction Electric utilities Electric utilities Grouting Grouting Mortar Mortar Offshore oil well production Offshore oil well production Offshore wind farms Offshore wind farms Offshore wind turbines Offshore wind turbines Pile foundations Pile foundations Piles Piles Rocks Rocks
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| GB/T 7714 | Wu, Zhaoqi , Zhang, Xingcheng , Song, Qiming et al. Numerical analysis of horizontal bearing capacity of large-diameter implanted rock-socketed piles for offshore wind turbines [C] . 2022 . |
| MLA | Wu, Zhaoqi et al. "Numerical analysis of horizontal bearing capacity of large-diameter implanted rock-socketed piles for offshore wind turbines" . (2022) . |
| APA | Wu, Zhaoqi , Zhang, Xingcheng , Song, Qiming , Liu, Wei , Chen, Zhibing . Numerical analysis of horizontal bearing capacity of large-diameter implanted rock-socketed piles for offshore wind turbines . (2022) . |
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| GB/T 7714 | Jiang Shaofei , Fu Chun , Wu Zhaoqi et al. 基于独立成分分析的经验模态分解过程中改进的本征模态函数判断方法 : ZA202200153[P]. | 2022-01-03 . |
| MLA | Jiang Shaofei et al. "基于独立成分分析的经验模态分解过程中改进的本征模态函数判断方法" : ZA202200153. | 2022-01-03 . |
| APA | Jiang Shaofei , Fu Chun , Wu Zhaoqi , Lin Guixing . 基于独立成分分析的经验模态分解过程中改进的本征模态函数判断方法 : ZA202200153. | 2022-01-03 . |
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| GB/T 7714 | Wu Zhaoqi , Chen Jiangyan , Zhang Kuoji et al. 一种用于悬臂板构件的防冷热桥节点及其建筑 : ZA202206614[P]. | 2022-06-15 . |
| MLA | Wu Zhaoqi et al. "一种用于悬臂板构件的防冷热桥节点及其建筑" : ZA202206614. | 2022-06-15 . |
| APA | Wu Zhaoqi , Chen Jiangyan , Zhang Kuoji , Yan Shijie . 一种用于悬臂板构件的防冷热桥节点及其建筑 : ZA202206614. | 2022-06-15 . |
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| GB/T 7714 | Wu Zhaoqi , Wu Shengping , Meng Quansong et al. 预应力高强纤维布加固柱构件的施工方法 : ZA202206453[P]. | 2022-06-10 . |
| MLA | Wu Zhaoqi et al. "预应力高强纤维布加固柱构件的施工方法" : ZA202206453. | 2022-06-10 . |
| APA | Wu Zhaoqi , Wu Shengping , Meng Quansong , Liu Han . 预应力高强纤维布加固柱构件的施工方法 : ZA202206453. | 2022-06-10 . |
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